Pyrrhopappus, 303
Pyrularia, 451
Pyrus, 164
Pyxidanthera, 326
Pyxie, 326
_Quamoclit_, 368
Queen-of-the-prairie, 153
Quercus, 475
Quillwort, 698
Radish, 74
Radula, 707
Ragged-Robin, 85
Ragweed, 273
Ragwort, 293
Ramsted, 379
RANUNCULACEAE, 34
Ranunculus, 40
Rape, Broom, 395
Raphanus, 74
Raspberry, 154
Rattlebox, 127
Rattlesnake-master, 211
Rattlesnake-root, 300
Rattlesnake-weed, 299
_Reboulia_, 729
Redbud, 147
Red-root, 112, 512
Redtop, 647
False, 665
Tall, 667
Reed, 658
Bur, 547
Reseda, 75
RESEDACEAE, 75
RHAMNACEAE, 111
Rhamnus, 111
Rheumatism-root, 53
Rhexia, 183
Rhinanthus, 392
Rhododendron, 320
_Rhodora_, 321
Rhus, 118
Rhynchosia, 147
Rhynchospora, _577_, 584
Ribes, 174
Ribgrass, 423
Ribwort, 422
Riccia, 730
RICCIACEAE, 730
Rice, Indian, 635
Water, 635
Richweed, 407, 465
Ricinus, 460
Riverweed, 444
Robinia, 134
Rocket, 71
Dyer's, 75
Sea, 74
Yellow, 70
Rock-rose, 76
Rosa, 162
ROSACEAE, 150
Rose, 162
Cotton, 267
Guelder, 218
Rock, 76
Rosebay, 320
Rosemary, Marsh, 327
Rosin-weed, 270
Rotala, 184
Rottboellia, 636
Roubieva, 433
RUBIACEAE, 222
Rubus, 154
Rudbeckia, 276
Rue Family, 106
Rue, Meadow, 39
Ruellia, 400
Rumex, 437
Ruppia, 564
Rush, 540
Rush, Bald, 577
Bog, 540
Club, 578
Horned, 586
Nut, 586
Scouring, 676
Spike, 573
Twig, 586
Wood, 546
RUTACEAE, 106
Rye, Wild, 673
Sabbatia, 347
Sage, 412
Jerusalem, 420
Wood, 406
Sagina, 88
Sagittaria, 554, 735
St. Andrew's-cross, 92
St. John's-wort, 92
Marsh, 95
St. Peter's-wort, 92
SALICACEAE, 480
Salicornia, 434
Salix, 480
Salmon-berry, 154
Salsify, 298
Salsola, 435, 734
Saltwort, 435
Salvia, 412
Salvinia, 701
SALVINIACEAE, 701
Sambucus, 217
Samolus, 332
Samphire, 434
Sandal-wood Family, 450
Sandweed, Sea, 651
Sandwort, 85
Sanguinaria, 58
Sanicula (Sanicle), 212
SANTALACEAE, 450
SAPINDACEAE, 115
Sapindus, 116
Sapodilla Family, 332
Saponaria, 83
SAPOTACEAE, 332
_Sarcoscyphus_, 721
Sarracenia, 57
SARRACENIACEAE, 57
Sarsaparilla, 212, 213
Sassafras, 447
Satureia, 411
Saururus, 446
Savin, 494
Savory, 411
Saxifraga, 169
SAXIFRAGACEAE, 168
Saxifrage, 169
Golden, 172
Scabiosa (Scabious), 229, 733
Scale-mosses, 702
Scapania, 713
Schedonnardus, 655
Scheuchzeria, 558
Schizaea, 690
_Schollera_, 536
Schrankia, 149
Schwalbea, 391
Schweinitzia, 325
_Scilla_, 523
Scirpus, _576_, 578, _582_
Scleranthus, 427
Scleria, 586
Sclerolepis, 238
Scolochloa, 666
Scolopendrium, 685
Scrophularia, 380
SCROPHULARIACEAE, 377
Scutellaria, 416
Sedge, 587
Sedge Family, 567
Sedum, 177
Seed-box, 187
Selaginella, 697
SELAGINELLACEAE, 697
Selenia, 63
Self-heal, 418
_Sendtnera_, 710
Senebiera, 74
Senecio, 292
Senna, 147
Sensitive-brier, 149
Sensitive-plant, Wild, 148
Sericocarpus, 254
Service-berry, 166
Sesuvium, 198
Setaria, 634
Seymeria, 388
Shad-bush, 166
Sheep-berry, 219
Shepherdia, 449
Shepherd's-purse, 73
Sherardia, 227
Shin-leaf, 323
Shooting-star, 329
Sibbaldia, 161
Sickle-pod, 66
Sicyos, 195
Sida, 99
Side-saddle Flower, 57
Silene, 83
Silkweed, 339
Silphium, 270
Silver-bell Tree, 334
Silver-berry, 449
Silver-weed, 160
_Sinapis_, 72
Sisymbrium, 71
Sisyrinchium, 515, 735
Sium, 207, _207_
Skullcap, 416
Skunk-cabbage, 550
Sloe, 152
Smartweed, 441
Smilacina, 525, _526_
Smilax, 519
Snake-head, 381
Snake-root, 47
Black, 212
Button, 211, 242
Seneca, 120
Virginia, 445
White, 241
Snapdragon, 380
Sneezeweed, 287
Sneezewort, 289
Snowball-tree, 218
Snowberry, 220
Creeping, 314
Snowdrop, 334
Soapberry, 116
Soapwort, 83
SOLANACEAE, 373
Solanum, 373
Solea, 81
Solidago, 246
_altissima_, 249
arguta, 250, _250_
bicolor, 247
Bigelovii, 247
Boottii, 250
caesia, 247
Canadensis, 251
Curtisii, 247
Drummondii, 252
Elliottii, 250
_elliptica_, 250
_gigantea_, 251
Houghtonii, 252
humilis, 248
juncea, 250
lanceolata, 252
latifolia, 247
Lindheimeriana, 247
_linoides_, 250
macrophylla, 247
Missouriensis, 251
monticola, 247
_Muhlenbergii_, 250
neglecta, 250
nemoralis, 251
odora, 249
Ohioensis, 252
patula, 249
petiolaris, 246
pilosa, 249
puberula, 248
radula, 251
Riddellii, 252
rigida, 252
rugosa, 249
rupestris, 251
sempervirens, 248
serotina, 251, _251_
Shortii, 251
speciosa, 249
squarrosa, 246
stricta, 248, _249_
tenuifolia, 252
_thyrsoidea_, 248
tortifolia, 249
uliginosa, 249
ulmifolia, 250
virgata, 248
Virgaurea, 248
Solomon's-seal, 524
False, 525
Sonchus, 305
Sophora, 127
Sorrel, 437
Mountain, 437
Wood, 105
Sorrel-tree, 316
Sour-gum, 215
Sour-wood, 316
Spanish-bayonet, 524
Spanish-needles, 285
Sparganium, 547
Spartina, 627
Spatter-dock, 56
Spearmint, 407
Spearwort, 41
Specularia, 308
Speedwell, 386
Spergula, 90
_Spergularia_, 89
Spermacoce, 225
Sphaeralcea, 99
Sphaerocarpus, 732
_Sphagnoecetis_, 713
Spice-bush, 447
Spiderwort, 539
Spigelia, 346
Spikenard, 213
False, 525
Spindle-tree, 110
Spiraea, 153, _153_
Spiranthes, 501
Spirodela, 552
Spleenwort, 683
Spoonwood, 319
Sporobolus, 645
Spring-beauty, 91
Spruce, 491
Spurge, 452
Spurrey, 90
Sand, 89
Squaw-root, 394
Squaw-weed, 293
Squirrel-corn, 60
Stachys, 421
Staff-tree, 110
Stagger-bush, 316
Staphylea, 118
Star-flower, 329
Star-grass, 512, 516
Star-of-Bethlehem, 523
Starwort, 86, 255
Water, 182
Statice, 327
Steeple-bush, 153
_Steetzia_, 724
Steironema, 330
Stellaria, 86, 733
Stenanthium, 534
Stenosiphon, 193
Stickseed, 362
Sticktight, 284
Stillingia, 460
Stipa, 641
Stitchwort, 87
Stonecrop, 177
Ditch, 176
Stone-root, 407
Storax, 333
Storksbill, 104
Stramonium, 377
Strawberry, 158
Barren, 158
Strawberry-bush, 110
Streptopus, 526
Strophostyles, 145
_Struthiopteris_, 690
Stuartia, 96
Stylophorum, 58
Stylosanthes, 142
STYRACACEAE, 333
Styrax, 334
Suaeda, 434
Subularia, 69
Succory, 298
Sugar-berry, 463
Sullivantia, 171
Sumach, 118
Sundew, 178
Sunflower, 277
Supple-Jack, 111
Sweetbrier, 164
Sweet-cicely, 210
Sweet-flag, 551
Sweet-gale, 469
Sweet-gum, 180
Sweet-leaf, 334
Sweet-scented shrub, 167
Sweet William, 83
Wild, 354
Sycamore, 466
Symphoricarpos, 220
Symphytum, 367
Symplocarpus, 550
Symplocos, 334
Synandra, 419
Synthyris, 386
Syringa, 174
Tacamahac, 487
Talinum, 91, 733
Tamarack, 493
Tanacetum, 290
Tansy, 290
Taraxacum, 303
Tare, 142
Taxodium, 493
Taxus, 494
Tea-berry, 316
Tea Family, 95
Tea, Labrador, 321
Mexican, 433
New, Jersey, 112
Oswego, 414
Tear-thumb, 442
Teasel, 229
Tecoma, 398
Tephrosia, 133
TERNSTROEMIACEAE, 95
Tetragonotheca, 274
_Tetranthera_, 447
Teucrium, 406
Thalictrum, 39, 39
Thaspium, 204, _208_
Thelesperma, 285
Thelypodium, 72
Thermopsis, 126
Thimbleberry, 155
Thistle, 295
Canada, 296
Cotton, 297
Plumeless, 296
Scotch, 297
Sow, 305
Star, 297
Thlaspi, 73
Thorn, 165
Black, 152
White, 165
Thoroughwax, 206
Thoroughwort, 239
Thuya, 493
Thyme, 411
Basil, 411
Creeping, 411
THYMELAEACEAE, 448
Thymus, 411
Tiarella, 171
Tickseed, 281
Tiedemannia, 202
Tilia, 101
TILIACEAE, 101
Tillaea, 177
Tillandsia, 511
Timothy, 645
Tinker's-weed, 291
Tipularia, 499
_Tissa_, 89
Toadflax, 379
Bastard, 450
Tobacco, 377
Indian, 307
Tofieldia, 532
Toothache-tree, 106
Toothwort, 64
Touch-me-not, 106
Townsendia, 254
Trachelospermum, 338
Tradescantia, 539
Tragia, 460
Tragopogon, 298
Trantvetteria, 39
Tread-softly, 457
Tree-of-heaven, 107
Trefoil, 128
Shrubby, 107
Tick, 138
Trichocolea, 709
Trichomanes, 692
Trichostema, 405
_Tricuspis_, 657, 658
Trientalis, 329
Trifolium, 128
Triglochin, 557
Trilisa, 243
Trillium, 530
Triodia, 657
Triosteum, 219
Tripsacum, 636
Trisetum, 653, 735
_Triticum_, 671, 672
Trollius, 45
Troximon, 302
Trumpet-creeper, 398
Trumpet-flower, 398
Trumpets, 57
Trumpet-weed, 239
Tsuga, 492
Tulip-tree, 50
Tumbleweed, 428
Tupelo, 215
Turnip, Indian, 549
Turnsole, 361
Turtlehead, 381
Tussilago, 291
Twayblade, 499, 501
Twin-flower, 219
Twin-leaf, 53
Twisted-stalk, 526
Typha, 547
TYPHACLAE, 547
Ulmus, 462
UMBELLIFERAE, 198
Umbrella-leaf, 53
Umbrella-tree, 49, 50
Unicorn-plant, 399
Uniola, 662
Urtica, 464
URTICACEAE, 461
Utricularia, 395
Uvularia, 527, _528_
_Vaccaria_, 83
Vaccinium, 312
Valeriana (Valerian), 228
Greek, 356
VALERIANACEAE, 228
Valerianella, 228
Vallisneria, 496
Vanilla-plant, 243
Velvet-leaf, 99
Venus's Fly-trap, 179
Looking-glass, 308
Veratrum, _533_, 533
Verbascum, 379
Verbena, 401
VERBENACEAE, 401
Verbesina, 280
Vernonia, 238
Veronica, 386
Vervain, 401
_Vesicaria_, 69
Vetch, 142
Joint, Sensitive, 137
Milk, 134
Vetchling, 143
Viburnum, 217
Vicia, 142
_Vilfa_, 645, 646
Vincetoxicum, 344
Vine Family, 112
Viola, 78
VIOLACEAE, 78
Violet, 78
Violet, Dame's, 71
Dog's-tooth, 528
Green, 81
Water, 328
Virginian-creeper, 115
Virgin's-bower, 35
VITACEAE, 112
Vitis, 113, 114
Waahoo, 110
Wake-robin, 530
Waldsteinia, 157
Walking-leaf, 685
Wallflower, Western, 71
Walnut, 467
Watercress, 69
Waterleaf, 357
Water-nymph, 55
Water-shield, 55
Waterweed, 495
Waterwort, 91
Wax work, 110
Wayfaring-tree, 217
Weigela, 222
Weld, 75
Wheat, Cow, 393
India, 443
Whin, 127
Whiteweed, 289
Whitlow-wort, 426
Wicky, 319
Willow, 480
Willow-herb, 188
Wind-flower, 36, 38
Winterberry, 109
Wintergreen, 315, 323
Aromatic, 315
Chickweed, 329
Creeping, 315
Spotted, 313
Wistaria, 134
Witch hazel, 179
Wolf berry, 220
Wolfsbane, 46
Woodbine, 115, 220
Woodsia, 690
Woodwardia, 683
Wood-waxen, 127
Wormseed, 434
Wormwood, 289
Roman, 273
Xanthium, 274
Xanthorrhiza, 48
_Xanthosoma_, 550
Xanthoxylum, 106
Xerophyllum, 532
XYRIDACEAE, 536
Xyris, 537
Yam, 517
Yarrow, 289
Yaupon, 108
Yellow-eyed, Grass, 537
Yellow-rattle, 392
Yellow-root, 48
Yellow-wood, 126
Yew, 494
Yucca, 524
Zannichellia, 565
Zephyranthes, 516, 735
Zizania, 635
Zizia, _206_, 207
Zostera, 565
Zygadenus, 534
PLATES
WITH EXPLANATIONS.
EXPLANATION OF PLATE I.
CYPERUS.--(1) Small plant of C. diandrus; (2) a spikelet magnified; (3)
a piece of the rhachis with one scale enclosing its flower; (4) a
separate flower more magnified.--(5) C. erythrorhizos, a spikelet
magnified; the lower scales and flowers have fallen, showing the small
internal scales of the section Papyrus, formed of the winged margins of
the joints of the rhachis detached; (6) a separate one, more enlarged;
(7) a flower; (8) an achene, cut in two.--(9) C. dentatus, a piece of
the rhachis of a spike with the lower part of one scale, showing how it
is decurrent on the joint beneath (cut across) to form scale-like wings.
DULICHIUM.--(1) Upper part of a plant of D. spathaceum; (2) part of a
spikelet somewhat enlarged; (3) piece of rhachis, and one scale
decurrent on the joint beneath; (4) magnified flower.
KYLLINGA.--(1) Plant of K. pumila; (2) one-flowered spikelet on a piece
of the rhachis, enlarged; (3) the same, more enlarged and open; (4)
achene; and (5) section of same magnified.
[Illustration: Genera of Cyperaceae. Plate I]
EXPLANATION OF PLATE II.
HEMICARPHA.--(1) Plant of H. subsquarrosa, natural size; (2) a spikelet
enlarged, with its bract; (3) magnified scale of the same; (5) a flower,
with its single stamen and minute internal scale, magnified; (6) achene,
magnified.
LIPOCARPHA.--(1) Upper part of plants of L. maculata, with spikelets;
(2) diagram of a flower, representing the ovary between the two internal
scales, a single stamen, the scale of the spikelet on one side, and the
axis of the spikelet on the other; (3) scale of spikelet detached; (4) a
flower with its two inner scales; (5) achene, magnified.
FUIRENA.--(1) Upper portion of plant of F. squarrosa, var. pumila; (2)
scale of spike enclosing a flower; (3) open scale of same; (4) flower;
(5) one of the scales and one of the bristles of the perianth; (6)
achene, and (7) section of same.
[Illustration: Genera of Cyperaceae. Plate II]
EXPLANATION OF PLATE III.
ELEOCHARIS.--(1) Small plant of E. olivacea; (2) the spikelet enlarged;
(3) detached scale; (4) flower; (5) achene and bristles.--(6) E.
quadrangulata, spikelet; (7) a scale; (8) flower; (9) achene and
bristles.--(10) E. tuberculosa; the achene with its great tubercle, and
bristles.
SCIRPUS.--(1) Summit of plant of small S. debilis; (2) a spikelet; (3) a
scale of the same, and (4) flower; (5) achene with its bristles.
ERIOPHORUM.--(1) Small plant of E. alpinum, in flower; (2) spikelet; (3)
a scale, and (4) a flower from the same; (5) the spikelet, in fruit, the
bristles forming a cottony tuft; (6) achene and its bristles.--(6, under
_Scirpus_) a small portion of the inflorescence of E. cyperinum; (7) a
flower; (8) a spikelet in fruit; (9) achene from the same, with the
tortuous bristles; (10) section of the achene.
FIMBRISTYLIS.--(1) Summit of a small flowering stem of F. laxa; (2) a
spikelet of the same; (3) a detached scale, and (4) a flower of the
same; (5) achene.--F. autumnalis, (6), a spikelet, enlarged; (7) flower;
(8) achene, and (9) section of the same.
[Illustration: Genera of Cyperaceae. Plate III]
EXPLANATION OF PLATE IV.
DICHROMENA.--(1) Head and involucre of D. latifolia; (2) a scale from
one of the spikelets, and (3) the same cut across; (4) a flower; (5)
achene with its tubercle.
PSILOCARYA.--(1) Part of plant, (2) enlarged spikelet, (3) detached
scale, (4) flower, and (5) achene with its beak, of P. scirpoides.
RHYNCHOSPORA.--(1) Upper part of flowering stem of R. Torreyana; (2) a
spikelet; (3) detached flower; (4) achene, with short bristles at its
base; (5) one of these bristles more magnified.
R. (Sec. CERATOSCHOENUS).--(1) Upper part of fruiting plant, (2) detached
spikelet, (3) flower, and (4) beaked achene, with its bristles, of R.
macrostachya.
[Illustration: Genera of Cyperaceae. Plate IV]
EXPLANATION OF PLATE V.
CLADIUM.--(1) Summit of a plant of C. mariscoides; (2) detached
spikelet; (3) same, open, showing a staminate and a perfect flower; (4)
the nut-like achene, and (5) the longitudinal section of the same.
SCLERIA.--(6) Summit of a flowering stem of S. reticularis; (7) three
spikelets from a cluster, the middle one pistillate, the lateral ones
staminate; (8) staminate spikelet displaying four male flowers, the
filaments of two of them having lost their anthers; (9) pistillate
spikelet displaying a single pistillate flower; (10) achene with the
3-lobed double cup underneath.
CAREX.--(11) Plant of C. pauciflora; (12) a staminate flower with its
scale; (13) scale, and (14) mature pistillate flower, in its perigynium;
(15) cross section of perigynium and of the contained achene; (16)
achene on its stalk, style and stigmas.--(17) C. Jamesii, upper part of
flowering plant; (18) the spike enlarged; (19) a staminate flower and
its scale; (20) pistillate flower in its perigynium; (21) the same with
half the perigynium cut away to show the contained achene and style.
[Illustration: Genera of Cyperaceae. Plate V]
EXPLANATION OF PLATE VI.
CAREX.--(1) C. trisperma, upper part of a stem in fruit; (2) enlarged
spike displayed, with three staminate and two pistillate flowers; (3) a
scale, and (4) a ripe perigynium, of the latter; with (5) a section of
the perigynium near the base, and of the contained achene.--(6) C.
straminea, var. brevior, summit of a fruiting plant; (7) a spike
enlarged; (8) scale of a pistillate flower; (9) the winged perigynium
and the contained achene cut across; (10) detached achene with
persistent style and stigmas.--(11) C. umbellata, whole plant; (12) a
perigynium and its scale; (13) cross-section toward the base of
perigynium and its contained achene; (14) detached achene with its
persistent style and stigmas.--C. bullata; (15) upper part of plant in
fruit, with one pistillate and two staminate spikes; (16) one of its
staminate flowers with the scale; (17) a pistillate scale, and (18)
mature perigynium; (19) longitudinal section of the latter, showing the
achene and its style, and (20) cross-section of the same.
[Illustration: Genera of Cyperaceae. Plate VI]
EXPLANATION OF PLATE VII.
LEERSIA.--(1) Panicle of L. oryzoides, reduced in size; (2) a branchlet
of the same, with its spikelets, of the natural size; and (3) an open
spikelet in flower, enlarged.
ZIZANIA.--(1) A staminate, and (2) a pistillate flower or spikelet of Z.
aquatica; (3) a magnified pistil with a pair of squamulae or hypogynous
scales; (4) a grain, and a magnified longitudinal section of the lower
part of the same, showing the embryo at the outside of the base of the
albumen.
ALOPECURUS.--(1) Part of a plant of A. geniculatus, in flower; (2) a few
spikelets from the spike-like inflorescence, moderately magnified; (3)
an open spikelet in flower, more magnified, and (4) the single flowering
glume detached.
PHLEUM.--A detached spikelet of P. pratense, having the flower with its
glume and palet raised above the empty glumes, magnified.
HELEOCHLOA.--(1) Inflorescence of H. schoenoides; (2) a separate
enlarged spikelet; and (3) the same open, in flower.
SPOROBOLUS.--(1) A spikelet of S. cryptandrus, magnified; (2) the same,
with the flower open, raised above the empty glumes; and (3) the fruit,
more magnified, showing the seed loose in the pericarp (utricle).--(4)
An enlarged spikelet of E. vaginaeflora; and (5) the same displayed.
AGROSTIS.--(1) Panicle of A. alba, var. vulgaris, with (2) an enlarged
open spikelet of the same; also (3) the rough pedicel and glumes of A.
scabra, with the flower separated, the latter having no palet.
[Illustration: Genera of Grasses. Plate VII]
EXPLANATION OF PLATE VIII.
POLYPOGON.--(1) Spike-like contracted panicle of P. Monspeliensis; (2)
an enlarged detached spikelet, showing the long awns to the empty
glumes; (3) the same open in flower; and (4) a separate flower without
the empty glumes.
CINNA.--(1) A magnified spikelet of C. arundinacea; and (2) the same
open, displaying the flowering glume and palet, the single stamen, and
the pistil.
MUHLENBERGIA.--(1) A magnified closed spikelet of M. sylvatica; (2) the
same with the open flower raised out of the empty glumes.--(3) A
magnified spikelet of M. diffusa; (4) its minute and unequal empty
glumes more magnified; and (5) an open spikelet of the same.
BRACHYELYTRUM.--(1) A spikelet of B. aristatum enlarged; (2) the same
displayed.
CALAMAGROSTIS.--(1) An open spikelet of C. Canadensis, enlarged,
displaying all the parts; (2) the same with the flower raised out of the
empty glumes, showing the hairy rudiment behind the palet.
ORYZOPSIS.--(1) An open magnified spikelet of O. asperifolia; and (2)
the flower of the same removed from the empty glumes. Notice the
remarkably long squamulae or hypogynous scales, which here nearly equal
the glume in length.
STIPA.--Empty glumes and flower (a little separated) of S. avenacea,
enlarged.
ARISTIDA.--A spikelet of A. purpurascens, enlarged.
[Illustration: Genera of Grasses. Plate VIII]
EXPLANATION OF PLATE IX.
SPARTINA.--(1) Portion of the inflorescence of S. stricta, of the
natural size; (2) a spikelet enlarged; and (3) the same displaced, the
flower raised above the empty glumes.
CTENIUM.--(1) Spike of C. Americanum; (2) a single spikelet magnified;
and (3) the same displayed, the empty glumes separated.
BOUTELOUA.--(1) A portion of the compound spike of B. racemosa, of the
natural size; and (2) a spikelet displayed and magnified, the flowers
raised out of the empty glumes.
GYMNOPOGON.--(1) Inflorescence of G. racemosus, reduced in size; and (2)
a magnified spikelet with the parts displayed.
CYNODON.--(1) Inflorescence of C. Dactylon, of digitate spikes; (2) a
spikelet magnified and displayed, showing a perfect flower and a
rudiment.
ELEUSINE.--(1) One of the spikes from the digitate inflorescence of E.
Indica; (2) a magnified spikelet; (3) the same with the flowers more
displayed; (4) a flower from the last, showing its parts; (5) the fruit
magnified, showing the seed loose in the utricle; and (6) the wrinkled
seed detached.--(1, under _Dactyloctenium_) Inflorescence of E.
AEgyptiaca, of digitate spikes; (2) one of the spikelets magnified; (3)
the fruit magnified, showing the seed loose in the thin pericarp
(utricle); and (4) the wrinkled seed more magnified.
DIPLACHNE.--(1) Small portion of the inflorescence of D. fascicularis;
(2) one of its spikelets displayed and magnified; (3) an open flower of
the same.
[Illustration: Genera of Grasses. Plate IX]
EXPLANATION OF PLATE X.
TRIODIA.--(1) Magnified spikelet of T. seslerioides; (2) the same
displayed and the lowest flower open; (3) back view of the flowering
glume spread out.
GRAPHEPHORUM.--(1) A magnified spikelet of G. melicoides, displayed; (2)
a part of the hairy rhachis and one flower of the same.
DIARRHENA.--(1) A spikelet of D. Americana, enlarged; (2) the grain in
its glume and palet.
DACTYLIS.--A spikelet of D. glomerata magnified and displayed.
KOELERIA.--(1) A magnified spikelet of K. cristata, expanded, showing
the empty glumes, the three flowers, and a rudiment; (2) lower half of a
flowering glume, partly spread open; it is much more folded and keeled
in its natural condition.
EATONIA.--A magnified spikelet of E. obtusata, expanded, showing the
empty glumes, the two flowers, and a rudiment.
MELICA.--A magnified spikelet of M. mutica, expanded, showing the empty
glumes, two perfect flowers, and an abortive one.
GLYCERIA.--(1) A magnified spikelet of G. nervata; (2) a separate flower
with one joint of the rhachis; and (3) the lower half of a flowering
glume, showing its form (rounded on the back, not keeled).
DISTICHLIS--(1) A pistillate spikelet of D. maritima, enlarged; (2) a
flower from the same; and (3) a flower from a staminate spikelet.
POA.--(1) Panicle of P. compressa, reduced in size; (2) a magnified
spikelet; (3) a separate flower more magnified; (4) a flowering glume
cut across and somewhat outspread.
ERAGROSTIS.--(1) A spikelet of E. pilosa, enlarged; (2) the same, from
which the glumes and all of six lower flowers except the palets have
fallen away; (3) a magnified flower, open; (4) the flowering glume of
the same outspread.
BRIZA.--(1) A spikelet of B. media, enlarged; (2) a separate flower.
FESTUCA.--(1) A spikelet of F. elatior, enlarged; (2) a separate flower;
(3) lower part of a flowering glume, outspread.
BROMUS.--(1) A spikelet of B. secalinus, or Chess; and (2) a separate
flower, enlarged.
[Illustration: Genera of Grasses. Plate X]
EXPLANATION OF PLATE XI.
UNIOLA.--(1) A spikelet of U. latifolia, of about the natural size; (2)
a flower, enlarged; (3) empty flowering glume of the lowest (sterile)
flower.
PHRAGMITES--(1) A spikelet of P. communis, enlarged; (2) one of the
perfect flowers, enlarged; and (3) the lowest flower, which has stamens
only.
ARUNDINARIA.--(1) A spikelet of A. macrosperma; and (2) a separate
flower, magnified.
SCHEDONNARDUS.--(1) Portion of the spike of S. Texanus, enlarged; and
(2) a flower, magnified.
LOLIUM.--(1) Portion of the spike of L. temulentum; and (2) a separate
flower, magnified.
AGROPYRUM.--(1) Portion of the spike of A. repens, or Couch-Grass, of
about the natural size; (2) a flower, magnified.
HORDEUM.--(1) The three one flowered spikelets from one joint of the
spike of H. jubatum, with their awn-like empty glumes, the lateral
flowers abortive and neutral, the middle one alone perfect; (2) this
perfect flower (with an awn-like rudiment) open and enlarged.
ELYMUS.--(1) The two spikelets of one joint of the spike of E.
Virginicus, about the natural size; (2) the empty glumes and the flowers
of one spikelet, enlarged and displayed; and (3) an open flower, more
magnified.
GYMNOSTICHUM.--(1) A spikelet of G. Hystrix; and (2) an expanded flower,
magnified.
ASPRELLA.--(1) A spikelet of A. Hystrix; and (2) an expanded flower,
magnified.
[Illustration: Genera of Grasses. Plate XI]
EXPLANATION OF PLATE XII.
DESCHAMPSIA.--(1) Panicle of D. flexuosa; (2) a spikelet, magnified, the
parts displayed; and (3) one of the flowers detached and open.
DANTRONIA.--(1) Panicle of D. spicata; (2) a spikelet enlarged; and (3)
a separate flower from the same.