IRIS FAMILY. _Iridaceae._

A large family, widely distributed and found throughout our continent.

Perennial herbs, with bracts; the leaves long, narrow, toothless, and

sheathing; the flowers showy, perfect and regular, twisted in the bud,

not falling off in withering, of three and six parts; the three stamens

on the base of the sepals, their anthers turning outward; the single

style with three branches; the ovary inferior, becoming a three-celled,

usually three-angled, many-seeded capsule. This family is noticeably

distinguished from the Lily family by the inferior ovary, and from the

Amaryllis family by the three stamens.

There are many kinds of Iris. To the casual observer the flowers appear

to have nine petals of different sizes, but in reality there are three

sepals, three petals, and three petal-like branches of the style. The

three outer divisions, or sepals, are large and spread or turn down;

the three inner divisions, or petals, are usually narrower and are

erect; the style branches arch over and under each is a stamen. The

sepals and petals have claws, which are united below and form a tube;

the capsule is large and contains many, flat, black seeds, in one or

two rows in each cell; the large rootstock is usually fleshy. Iris is

from the Greek for "rainbow," in allusion to the variegated tints, and

Flower-de-luce from the French "fleur-de-lis," or "lily-flower." Many

odd and beautiful kinds are cultivated from the Old World. Orris-root

is made from the roots of a Florentine species.

[Sidenote: =Western Blue Flag=

_Ìris Missouriénsis_

=Violet, blue

Spring, summer

West, except Wash, and Oreg.=]

A very handsome and decorative plant, growing in large clumps,

in damp situations, from stout, creeping rootstocks. The stiff,

sword-shaped leaves, mostly shorter than the stems, are smooth and

light bluish-green and the stout stems, from one to two feet high,

bear usually two, pale-violet flowers, about three inches long,

emerging from thin, papery bracts. The sepals are white, or pale blue,

delicately veined with violet, with a yellow-veined rib down the

middle, the petals are pale blue or pale violet, veined with purple,

and the buds are yellowish, veined with brown. This grows in profusion

in the Yosemite meadows, at the foot of El Capitan, and is delicately

beautiful, but would be more effective if the coloring were a little

stronger.

[Illustration: Western Blue Flag-Iris Missouriensis.]

[Sidenote: =Douglas Iris=

_Ìris Douglasiàna_

=Purple, lilac, cream

Spring, summer

Cal., Oreg.=]

A beautiful kind, very common in the Coast Ranges. It grows in

patches, or singly, and has rather dark green leaves, longer than the

flower-stalks, and lovely flowers, which vary exceedingly in color.

Near the coast they are usually bluish-purple, but in mountain woods

they run from violet and mauve to pink, yellow, and white. They are

often striped with white and yellow, delicately veined with purple,

and measure three or four inches across. In the redwood forests, in

northern California, they are peculiarly large and beautiful, their

delicate tints of cream and straw-color, tinged with mauve and marked

with reddish-purple, and wonderfully set off by their dark forest

background. This kind often blooms throughout the rainy season, but

chiefly in early spring.

[Sidenote: =Hartweg's Iris=

_Ìris Hartwégi_

=Yellow and violet

Summer

California=]

This odd and pretty little Iris grows in half-dry, open forests, in

the Sierra Nevada Mountains. The many flower-stems, from six to twelve

inches tall, are overtopped by some of the long, narrow leaves and the

flowers are from one and a half to two inches long, either yellow,

veined with violet, or pale-violet, veined with purple. The two color

forms often grow together and attract much attention from tourists.

They look very pretty, springing from a carpet of fallen pine-needles,

in the forests along the Wawona road near Yosemite.

[Sidenote: =Ground Iris=

_Ìris macrosìphon_

=Blue, purple

Spring, winter

California=]

A beautiful kind, forming low clumps of many, very narrow leaves, from

five to twenty inches long and much taller than the flower-stalks. The

handsome flowers are over three inches across, bright purplish-blue,

the sepals veined with darker color and marked with a white

stripe. This is common on grassy hills near the coast and farther

inland becomes taller and paler in color. The flowers are slightly

sweet-scented and begin to bloom in January. The Hupa Indians used the

leaves for making twine and rope for their nets and snares. There are

many other beautiful western Irises.

[Illustration: Iris Douglasiana.]

There are numerous kinds of Sisyrinchium, attractive little plants,

all American, many from South America; with fibrous roots; grasslike

leaves; slender, flat stems, sometimes branching; papery and green

bracts and pretty flowers, that soon wither, on very slender pedicels,

the six spreading divisions all alike; the filaments of the stamens

united; the style branches slender, the capsule roundish, containing

round seeds.

[Sidenote: =Blue-Eyed Grass=

_Sisyrínchium béllum_

=Blue Summer

Cal., Oreg.=]

The deep blue stars of this pretty plant are a beautiful feature of the

fields near Santa Barbara, and in other parts of California, in summer;

in fact they are so plentiful in some places that they are a menace

to the farmers. They grow in clumps, about a foot tall, among the

grass. The stems are somewhat branching, the leaves are shorter than

the stem, and the bracts are about an inch long, green and sheathing.

There are about seven flowers on each stem, in a loose cluster, each

about an inch across and handsomer than their relations in the East.

They vary in tint from bright blue to purple, with a yellow "eye," and

their divisions are prettily notched at the tips, with a little prong.

The anthers are arrow-shaped, the style short, with three very small

stigmas, and the small, oddly-shaped, little capsule is dark-brown when

ripe, and perhaps suggested one of the common names, Nigger-babies. It

is called Azulea and Villela by Spanish-Californians.

[Sidenote: =Golden-Eyed Grass=

_Sisyrínchium Califórnicum_

=Yellow

Spring, summer

Cal., Oreg.=]

This is very much like Blue-eyed Grass, but the flowers are bright

yellow, the stems are about a foot tall, broadly winged and not

branching, and the leaves are somewhat broader. The pretty flowers are

nearly an inch across and there are from three to seven in a cluster.

The filaments are united at the base only, the style is cleft to

below the middle, and the small capsule is rather oblong. This grows

in swampy places near the ocean. _S. Arizònicum_ has yellow flowers

and branching stems and grows in Arizona. _S. Élmeri_ also has yellow

flowers, with purple lines, and is found in wet places in the Sierras.

When pressed and dried the yellow-flowered Sisyrinchiums stain the

paper reddish-purple.

[Illustration: Blue-eyed Grass--Sisyrinchium bellum.]

Field Book of Western Wild Flowers · 第 81 / 319 题