1ft. to 2ft. long, 6in. to 12in. broad, lanceolate, with numerous
spreading pinnæ, the lower ones 4in. to 6in. long, 1in. broad,
cut down to a broadly-winged rachis into numerous nearly entire
elliptical spreading pinnules. _sori_ in close regular rows,
reaching nearly from the midrib to the edge, slightly curved, the
lower ones often double. North America, &c., 1823. Hardy or cool
house species. SYN. _Athyrium thelypteroides_.
=A. Thwaitesii= (Thwaites's).* _rhiz._ wide-creeping, stout. _sti._
6in. long, slender, densely clothed with strong white woolly hairs.
_fronds_ 1ft. or more long, 4in. to 6in. broad, with eight to
ten distinct pinnæ beneath the pinnatifid apex, the largest 3in.
long, 5/8in. broad, cut down two-thirds of the way to the rachis
in oblong crenulated lobes, 1/4in. deep, two lines across. _sori_
reaching half-way to the edge, the lowest about one line long.
Ceylon. Very fine stove species. SYN. _Diplazium Thwaitesii_.
[Illustration: FIG. 174. ASPLENIUM TRICHOMANES.]
=A. Trichomanes= (maiden-hair).* Maidenhair Spleenwort. _sti._
densely tufted, 1in. to 4in. long. _fronds_ 6in. to 12in. long,
about 1/2in. broad, with fifteen to thirty opposite pairs of
sessile horizontal pinnæ, which are 1/4in. to 3/8in. broad, one
and a-half to two lines deep, edge slightly crenate, the two sides
unequal, the upper one the broadest, and narrowed suddenly at
the base. _sori_ linear-oblong, three to six on each side of the
midrib. Great Britain, and almost cosmopolitan. Hardy species. See
Fig. 174. There are several varieties in cultivation, of which the
following are the most important:
[Illustration: FIG. 175. ASPLENIUM TRICHOMANES CRISTATUM.]
=A. T. cristatum= (crested).* _fronds_ 4in. to 6in. long,
simply pinnate, with roundish pinnæ, and broad crests at their
extremities, sometimes divided, each fork crested. A very pretty
little variety, requiring frame or greenhouse treatment. See Fig.
175.
=A. T. incisum= (deeply-cut).* _fronds_ 3in. to 6in. long; pinnæ
deeply pinnatifid, the lobes again deeply cut or serrated. A very
rare and pretty form.
=A. T. multifidum= (much-divided).* _fronds_ 3in. to 6in. long,
once, twice, thrice, or, rarely, quadri-furcate, each division
terminated with a little crest. A free-growing kind.
=A. T. ramosum= (branched).* _fronds_ 5in. to 8in. long, freely
branched, each division being again forked; pinnæ deeply cut or
crenated, or serrate. More hardy than any of the other forms.
=A. trilobum= (three-lobed).* _sti._ tufted, 2in. to 3in. long.
_fronds_ 1in. to 1-1/2in. long, 1in. broad, rhomboidal, apex acute,
base cuneate, entire, the margin undulato-crenate, or the lower
part deeply lobed, with broad inciso-crenate divisions. _sori_
broad and short. Chili and South Brazil. A very rare little stove
species. SYN. _A. parvulum_.
=A. umbrosum= (shady). _sti._ 1ft. or more long, scaly at the base.
_fronds_ 2ft. to 5ft. long, 12in. to 18in. broad, ovate-deltoid;
pinnæ ovate-lanceolate, 6in. to 9in. long, 3in. to 6in. broad, with
lanceolate pinnules, which are again cut down to the midribs into
unequal-sided rhomboidal lobes, with the margins sharply crenated.
_sori_ copious, oblong, with large tumid membranous involucres.
Madeira, Canaries, Himalayas, &c. Very widely distributed. A very
handsome greenhouse species. SYNS. _Allantodia australe_, _Athyrium
umbrosum_.
=A. varians= (variable). _sti._ tufted, 1in. to 3in. long. _fronds_
4in. to 6in. long, 1in. broad, oblong-lanceolate, with eight to
twelve pairs of pinnæ on each side, lower ones sub-deltoid, 1/2in.
to 3/4in. long, 1/4in. broad, cut down to the rachis into a few
cuneato-flabellate pinnules, the lowest two lines across, sharply
toothed on the outer edge. _sori_ copious, when mature, covering
nearly the whole under surface of the pinnules. Himalayas, and
widely distributed. Greenhouse species.
=A. Veitchianum= (Veitch's). Synonymous with _A. Belangeri_.
=A. Vieillardii= (Vieillard's).* _sti._ tufted, 4in. to 6in.
long. _fronds_ 6in. to 9in. long, 6in. to 8in. broad, with large
linear-lanceolate terminal pinna, lengthened out at the point, and
deeply serrated, and three to four pairs of erecto-patent similar
lateral ones, which are 3in. to 4in. long, upwards of 1/2in. broad,
equally truncato-cuneate, and the lower ones slightly stalked at
the base. _sori_ distant, falling short of both edge and margin.
New Caledonia. A very graceful greenhouse species. SYN. _A.
schizodon_. _A. apicidens_ is but a variety of this, with shortened
sori and more obtuse venation.
[Illustration: FIG. 176. ASPLENIUM VIRIDE, showing Barren and Fertile
Pinnæ (_a_ and _b_), Sorus (_c_), and Sporangium (_d_).]
=A. viride= (green). Green Spleenwort.* _sti._ densely tufted,
2in. to 4in. long. _fronds_ 4in. to 6in. long, 1/2in. broad, with
twelve to twenty sub-sessile pinnæ on each side, ovate-rhomboid;
upper edge narrowed suddenly at the base, the lower one
obliquely truncate, outer part deeply crenated. _sori_ copious,
linear-oblong, oblique. Great Britain, &c., widely distributed in
both hemispheres. It requires to be planted in a well-drained but
moist situation. Hardy species. See Fig. 176.
=A. vittæforme= (narrow-fronded).* _rhiz._ creeping. _sti._ short,
erect. _fronds_ entire, lanceolate, 12in. to 18in. long, 1-1/2in.
to 3in. broad, narrowed to an acute point, and very gradually
into the stem below; margin obscurely toothed. _sori_ copious,
often reaching from the midrib nearly to the edge. Java, &c. Stove
species. SYN. _A. sundense_.
=A. viviparum= (plant-bearing).* _sti._ tufted. 6in. to 9in. long.
_fronds_ 1ft. to 2ft. long, 6in. to 8in. broad, ovate-lanceolate,
with numerous close-placed erecto-patent pinnæ on each side,
which are 3in. to 4in. long, 1-1/2. to 2in. broad, cut down to a
compressed rachis into numerous pinnatifid pinnules, the lower
segments of which are again forked; ultimate segments 1/4in.
to 3/8in. long, quarter-line broad. _sori_ solitary, marginal.
Mauritius, &c., 1820. A very handsome stove species.
=A. vulcanicum= (volcanic). _sti._ 6in. to 9in. long. _fronds_
1ft. to 2ft. long, 4in. to 8in. broad, oblong-lanceolate, with
a linear-terminal pinna, or gemmiferous at the apex, and six to
twelve lateral ones on each side; lower ones stalked, 2in. to 4in.
long, 3/4in. to 1in. broad, acuminated; edge slightly dentate; the
base truncate. _sori_ very regular and parallel, falling short of
the edge. Malay Islands. Stove species. SYN. _A. heterodon_.
=A. zeylanicum= (Ceylonese).* _sti._ scattered, 4in. to 8in.
long. _fronds_ 6in. to 12in. long, 1in. to 2in. broad, the point
acuminated, apex slightly lobed, the lower two-thirds more deeply
so, and the base quite down to the rachis; lobes blunt, 1/4in. to
1/2in. across. _sori_ linear, two to three lines long. Ceylon.
Stove species. SYN. _Diplazium zeylanicum_.
=ASSONIA= (commemorative of Ignatius de Asso, a distinguished Spanish
botanist, who wrote on the plants of Arragon). ORD. _Sterculiaceæ_.
This genus is now included by best authorities under _Dombeya_.
Ornamental stove evergreen trees, with undivided leaves, and axillary,
bifid, sub-corymbose peduncles. They are of easy culture; thriving
freely in any light rich soil, or a mixture of loam and peat. Young
cuttings will root freely in sand, with a brisk bottom heat, if covered
by a bell glass.
=A. populnea= (Poplar-leaved). _fl._ white, disposed in a terminal,
bifid corymb; peduncles scarcely longer than the petioles. June.
_l._ cordate, acuminated, smooth, a little serrated. _h._ 10ft. to
20ft. Bourbon, 1820.
=A. viburnoides= (Viburnum-like). _fl._ white; peduncles three
times longer than the petioles. _l._ cordate, somewhat acuminate,
crenated, tomentose beneath, as well as younger leaves. _h._ 10ft.
to 20ft. Bourbon, 1822.
=ASTARTEA= (a mythological name: Astarte, the Syrian Venus). ORD.
_Myrtaceæ_. An ornamental greenhouse evergreen shrub, requiring a
mixture of loam, peat, leaf soil, and sand. Young cuttings root readily
in sand under a bell glass in gentle heat.
=A. fascicularis= (bundle-flowered). _fl._ white, pedicellate,
solitary, axillary. May. _l._ opposite, linear, fleshy; when young,
disposed in axillary fascicles. _h._ 6ft. to 9ft. West Australia,
1830.
=ASTELMA= (from _a_, not, and _stelma_, a crown; in reference to the
construction of the fruit). ORD. _Compositæ_. Greenhouse evergreen
shrubs from the Cape of Good Hope. Some species of this genus, which is
now generally referred to _Helipterum_, are very handsome, and thrive
well in a mixture of fibrous peat, leaf soil, and sand, with thorough
drainage. Fill the pots one-third full of crocks; water carefully,
and only when absolutely necessary; and place in a situation near the
glass, allowing a free admission of air. Seeds should be sown in pots
of light, open soil, and placed in a gentle heat; half-ripened cuttings
will strike readily in sandy soil with a hand glass placed over them.
They are now but rarely seen under cultivation.
=A. canescens= (hoary). _fl.-heads_ purple; scales of involucre
ovate; branches one-flowered. May to June. _l._ oblong, blunt,
imbricated. _h._ 1-1/2ft. 1794.
=A. eximium= (fine).* _fl.-heads_ crimson; corymbs sessile.
July. _l._ sessile, ovate, close, erect, white with thick woolly
pubescence. Stem stout. _h._ 3ft. 1793. This is a very beautiful
species.
=A. speciosissimum= (showiest). _fl.-heads_ white, large,
solitary, terminal. July. _l._ sessile, lanceolate-obovate, acute,
three-nerved, woolly. _h._ 8ft. 1691.
=ASTEPHANUS= (from _a_, without, and _stephanos_, a corona; corona
absent). ORD. _Asclepiadeæ_. A genus of pretty evergreen greenhouse
twiners. Flowers few, small, disposed in interpetiolar umbels; corolla
campanulate. Leaves small, opposite. They thrive in a compost of
turfy peat, leaf soil, and loam, in equal parts. Very little water is
required when the plants are at rest. Cuttings root readily in sandy
soil in a moderate heat. Propagation may also be effected by division.
=A. linearis= (linear). _fl._ white; umbels dividing in
threes, lateral and terminal. July. _l._ 1in. long, opposite,
linear-lanceolate. Stem glabrous. Cape of Good Hope, 1816.
=A. triflorus= (three-flowered).* _fl._ white; umbels generally
three-flowered. July. _l._ opposite, lanceolate, villous beneath.
Stems hairy. Cape of Good Hope, 1816.
=ASTER= (from _aster_, a star; general shape of flower-heads).
Michaelmas Daisy; Star-wort. SYN. _Pinardia_ (of Necker). ORD.
_Compositæ_. Hardy herbaceous perennials, except where otherwise
stated. Heads solitary, corymbose, or panicled, heterogamous, rayed;
ray florets pistiliferous, one or two-seriate, fertile or neuter;
ligule elongated, white, blue, or purple; disk florets hermaphrodite,
fertile, tubular, yellow, five-cleft; involucre campanulate or
hemispheric; bracts few or many-seriate, outer smaller or larger;
receptacle flat or convex; pappus hairs few or copious, scabrid, outer
sometimes shorter, rigid, and paleaceous. Leaves alternate. This large
genus contains many handsome border and alpine deciduous perennials
(rarely biennials) of easy culture in ordinary soil. They may be
propagated by divisions in autumn or spring, or by seeds in spring. The
greenhouse species are mostly evergreen shrubs, requiring a compost of
peat, leaf soil, and loam. Cuttings root readily in a sandy soil, under
a hand glass, with very little heat.
=A. acris= (acrid). _fl.-heads_ blue; involucre imbricated, twice
as short as the disk. August. _l._ linear-lanceolate, not dotted,
three-nerved. _h._ 2ft. South Europe, 1731.
=A. acuminatus= (taper-pointed).* _fl.-heads_ white; panicle
corymbose. September. _l._ broad-lanceolate, narrowed at base,
entire, with a very long point. Stem simple, flexuous, angular.
_h._ 2ft. North America, 1806.
=A. adulterinus= (false). _fl.-heads_ violet; involucre squarrose,
shorter than the disk. September. _l._ amplexicaul, lanceolate;
lower ones sub-serrate, smooth; those of the branches linear
squarrose. _h._ 3ft. North America.
=A. æstivus= (summer-flowering).* _fl.-heads_ blue. July. _l._
lanceolate, somewhat amplexicaul, narrowed at the end, scabrous
at edge. Stem erect, hispid; branchlets pilose. _h._ 2ft. North
America, 1776.
=A. albescens= (whitish). _fl.-heads_ purple or whitish,
nearly 1in. across; corymbosely panicled; scales of involucre
ovate-linear, apiculate; ray twenty-flowered. August. _l._
lanceolate on short petioles, denticulate, downy. Plant beset with
rusty down. _h._ 3ft. Nepal, 1842.
=A. alpinus= (alpine).* _fl.-heads_ bright purple, 1in. to 2in.
across; scales of involucre nearly equal, lanceolate, bluntish.
July. _l._, radical ones lanceolate-spathulate; those of the stem
lanceolate. Stem one-flowered. _h._ 6in. to 9in. Europe, 1658. A
very attractive species, having a dwarf, stout habit; it forms
a useful and handsome subject for edging, and its flowers are
valuable for cutting purposes. See Fig. 177.
=A. a. albus= (white).* _fl.-heads_ white, in other respects
resembling the type; but it is much less desirable, and has not
nearly so vigorous a habit. Europe, 1827.
=A. altaicus= (Altaian).* _fl.-heads_ blue-purple, about
2in. across; stem simple, corymbose, downy. June, July. _l._
linear-lanceolate, entire, blunt mucronate, three-nerved at
base, veiny. _h._ 1ft. Siberia, 1804. This, which is frequently
considered a variety of _A. alpinus_, is one of the handsomest.
=A. alwartensis= (Alwart). _fl.-heads_ red; ray very fine;
involucre loosely squarrose. May. _l._ ovate, narrowed at base,
entire, about five-nerved. _h._ 1ft. Caucasus, 1807.
=A. Amellus= (Amellus).* _fl.-heads_ purple, solitary, numerous;
involucre imbricated squarrose; leaves blunt; inner membranous,
coloured at edge. August. _l._ oblong-lanceolate, scabrous. _h._
2ft. Italy, 1596. One of the best border kinds.
[Illustration: FIG. 177. ASTER ALPINUS.]
=A. A. bessarabicus= (Bessarabian).* A most desirable variety,
frequently seen in gardens; it is rather taller than the type, with
larger flower-heads, of a deep purple colour. One of the showiest
of all the Asters. See Fig. 178.
[Illustration: FIG. 178. ASTER AMELLUS BESSARABICUS.]
=A. amplexicaulis= (stem-clasping). _fl.-heads_ violet. July. _l._
ovate-oblong, acute, amplexicaul, cordate, serrated, smooth. Stem
panicled, smooth; branches one to two-headed. _h._ 3ft. North
America.
=A. amygdalinus= (Almond-leaved). _fl.-heads_ white; involucre
closely imbricated. August. _l._ lanceolate, narrowed at base,
acuminated, scabrous at edge. Stem simple, corymbose at end. _h._
2ft. North America, 1759.
=A. argenteus= (silvery).* _fl.-heads_ purple. August. _l._
oblong-lanceolate, silky, sessile. Stem slender, decumbent, loosely
branched; branches and branchlets one-headed. _h._ 1ft. North
America, 1801.
=A. bellidiflorus= (Daisy-flowered). _fl.-heads_ pale red;
involucre with spreading scales. September. _l._ amplexicaul,
narrow-lanceolate, scabrous above, lower sub-serrated. Stem much
branched. _h._ 3ft. North America.
=A. Bigelovii= (Bigelow's).* _fl.-heads_ corymbose, 2-1/2in.
diameter, ray-florets lilac, disk yellow. Summer. _l._ scabrous
pubescent, oblong-spathulate; cauline ones amplexicaul,
ovate-oblong, crenate, obscurely-toothed. _h._ 2-1/2ft. Colorado,
1878. A very handsome biennial species. SYN. _A. Townshendi_.
=A. blandus= (charming). _fl.-heads_ pale purple; racemes
scarcely longer than the leaves. October. _l._ sub-amplexicaul,
oblong-lanceolate, acuminate, sessile, smooth. Stem pyramidal. _h._
2ft. North America, 1800.
=A. canescens= (hoary). _fl.-heads_ pale purple; involucre
imbricated, very acute, longer than disk. September. _l._ linear.
Panicle corymbose, much branched, leafy. _h._ 2ft. North America,
1812. Biennial or perennial.
=A. cassiarabicus= (Arabian Cassia). _fl.-heads_ pink; panicles
corymbose. September. _l._ ovate, acute, serrated, tapering at the
petioles. Plant erect, pilose. _h._ 2ft. Russia, 1834.
=A. caucasicus= (Caucasian).* _fl.-heads_ purple, solitary; scales
of involucre nearly equal, linear. July. _l._ ovate, sessile,
scabrous. _h._ 1ft. Caucasus, 1804.
=A. ciliatus= (ciliated). _fl.-heads_ white. September. _l._
ciliated; cauline ones linear-lanceolate, nerved; those of the
branches very short lanceolate, three-nerved. Stem branched, downy;
branches downy. _h._ 3ft. North America.
=A. concinnus= (neat).* _fl.-heads_ purple; involucre closely
imbricated. October. _l._ sub-amplexicaul, lanceolate; lower ones
sub-serrate, smooth. Stem simple, panicled at end. _h._ 2ft. North
America, 1800.
=A. concolor= (one-coloured). _fl.-heads_ purple; raceme terminal.
October. _l._ oblong-lanceolate, hoary on each side. Stem simple,
erect, downy. _h._ 1ft. North America, 1759.
=A. conyzioides= (Conyza-like). Synonymous with _Seriocarpus
conyzioides_.
=A. cordifolius= (heart-leaved). _fl.-heads_ blue, small, disposed
in crowded racemes, which are slightly drooping. July. _l._
cordate, pilose beneath, finely serrated, stalked. Stem smoothish,
panicled; panicle spreading. _h._ 2ft. North America, 1759.
=A. coridifolius= (Coris-leaved). _fl.-heads_ pale blue. October.
_l._ very numerous, linear, blunt, reflexed, hispid at edge. Stem
branched, diffuse, smooth; branches one-headed. _h._ 1ft. North
America.
[Illustration: FIG. 179. ASTER CORYMBOSUS, showing Habit and
Flower-head.]
=A. corymbosus= (corymbose). _fl.-heads_ corymbose, about 1in.
in diameter; ray-florets few, narrow, white; disk-florets pale
yellow. Autumn. _l._ 3in. long, cordate acute, lobed at the base,
coarsely toothed. Stems brittle, blackish purple. _h._ 2ft. to 3ft.
SYN. _Biotia corymbosa_. See Fig. 179.
=A. diffusus= (diffuse). _fl.-heads_ white; involucres imbricated.
October. _l._ elliptic-lanceolate, equal, serrated, smooth.
Branches spreading. Stem pubescent. _h._ 2ft. North America, 1777.
=A. Douglasii= (Douglas's).* _fl.-heads_ purple; involucral scales
linear or spathulate-linear, loosely imbricated. August. _l._
lanceolate, acute, entire, or rarely serrate, mostly tapering at
the base. Stem smooth, slender, paniculately branched, leafy. _h._
3ft. to 4ft. California, &c.
=A. dracunculoides= (Tarragon-like).* _fl.-heads_ white, about 1in.
across, disposed in dense cymose clusters; involucre imbricated.
September, October. _l._ linear, acuminated, entire; lower ones
linear-lanceolate, sub-serrate. Branches corymbose. _h._ 3ft. North
America, 1811. A very handsome species.
=A. dumosus= (bushy).* _fl.-heads_ white, about 1/2in. across,
disposed in broad clusters; involucre cylindrical, closely
imbricated. October. _l._ linear, glabrous; those of the branches
very short. Branches panicled. _h._ 2ft. North America, 1734.
=A. d. albus= (white).* _fl.-heads_ quite white, and rather smaller
than those of the species. North America.
=A. d. violaceus= (violet). _fl.-heads_ violet-purple. North
America.
=A. elegans= (elegant). _fl.-heads_ blue, small; corymb contracted,
drooping; scales of involucre oblong-cuneate, blunt, squarrose.
September. _l._ scabrous; cauline ones oblong-lanceolate, acute;
radical ones oblong, stalked. _h._ 2ft. North America, 1790. A very
elegant species, having a graceful habit.
=A. eminens= (eminent). _fl.-heads_ light blue. October. _l._
linear-lanceolate, acuminate, scabrous at edge; lower ones
sub-serrated. Stem panicled; branches one-headed. _h._ 2ft. North
America.
[Illustration: FIG. 180. ASTER ERICOIDES.]
=A. ericoides= (Heath-like).* _fl.-heads_ white; involucre
squarrose, leaflets acute. September. _l._ linear, glabrous; those
of the branches subulate, close together; and those of the stem
long. _h._ 3ft. North America, 1758. A very pretty species. See
Fig. 180.
=A. floribundus= (many-flowered).* _fl.-heads_ light purple.
September. _l._ sub-amplexicaul, lanceolate; lower ones serrated.
Stem smooth; branches corymbose. _h._ 4ft. North America.
=A. foliosus= (leafy). _fl.-heads_ pale blue; involucre imbricate.
September. _l._ linear-lanceolate, acuminate, narrowed at each
end. Stem downy, panicled, erect; branches few-headed. _h._ 3ft.
North America, 1732.
=A. fragilis= (fragile). _fl.-heads_ flesh-coloured, small;
involucre imbricated. September. _l._ linear, acuminate, entire;
radical ones oblong, serrate. Branches in corymbose panicles. _h._
2ft. North America, 1800.
[Illustration: FIG. 181. ASTER GRANDIFLORUS.]
=A. grandiflorus= (large-flowered).* _fl.-heads_ purple, large,
terminal; scales of involucre squarrose. November. _l._ linear,
rigid, acute, sub-amplexicaul; those of the branches reflexed,
hispid at edge. _h._ 2ft. North America, 1720. See Fig. 181.
=A. hyssopifolius= (Hyssop-leaved).* _fl.-heads_ white, or purple
shaded; scales of the involucre about half as long as the disk.
August to October. _l._ linear-lanceolate, acute, with the margins
scabrous. Branches fastigiate and corymbose, smooth. _h._ 1-1/2ft.
to 2ft. North America.
=A. lævigatus= (smooth-stemmed). _fl.-heads_ flesh-coloured,
about 1in. across, disposed in large panicles. September. _l._
sub-amplexicaul, broad-lanceolate, sub-serrate, smooth. Stem
glabrous. Branches many-headed. _h._ 3ft. North America, 1794.
=A. lævis= (smooth).* _fl.-heads_ blue; involucre imbricated with
cuneiform leaflets. September. _l._ sub-amplexicaul, remotely
oblong, entire, lucid; radical ones sub-serrated. _h._ 2ft. North
America, 1758. One of the best border species.
=A. laxus= (loose-flowered). _fl.-heads_ white, about 1in. across;
clusters loose. October. _l._ linear-lanceolate, scabrous at edge;
lower ones sub-serrated; stem ones reflexed. Stem loosely panicled.
_h._ 2ft. North America.
=A. linarifolius= (Toad-flax-leaved). _fl.-heads_ pale blue.
September. _l._ numerous, linear, mucronated, nerveless, not
dotted, keeled, scabrous, rigid. Branches fastigiate, one-headed.
_h._ 1ft. North America, 1699.
=A. linifolius= (Flax-leaved). _fl.-heads_ white; involucre
imbricated, short. July. _l._ linear, nerveless, dotted, scabrous,
reflexed, spreading. Branches corymbose, fastigiate, leafy. _h._
2ft. North America, 1739.
=A. longifolius= (long-leaved).* _fl.-heads_ white, 1in. across,
in dense corymbose panicles; involucre squarrose. October. _l._
linear-lanceolate, rarely toothed, very long, smooth. _h._ 3ft.
North America, 1798. There are several varieties of this handsome
species.
=A. l. formosus= (charming).* _fl.-heads_ pink, produced in dense
corymbs. _h._ 1-1/2ft. to 2ft.
=A. macrophyllus= (large-leaved). _fl.-heads_ white. August. _l._
large, ovate, stalked, serrated, scabrous; upper ones cordate,
sessile. Stem branched, diffuse. _h._ 2ft. North America, 1739.
=A. multiflorus= (many-flowered).* _fl.-heads_ white, small; corymb
large, elongated; involucre imbricated; scales oblong, squarrose,
acute. September. _l._ linear, glabrous. Stem much branched,
diffuse, downy; branchlets one-sided. _h._ 3ft. North America, 1732.
=A. myrtifolius= (Myrtle-leaved). _fl.-heads_ white; involucre
imbricated; scales length of disk. August. _l._, stem ones,
amplexicaul, scabrous; those of the branches small. _h._ 2ft. 1812.