BUCKWHEAT FAMILY. _Polygonaceae._

A large family, widely distributed, mostly herbs or low shrubs, with

toothless leaves, often with stipules sheathing the swollen joints of

the stem. The small flowers have no petals, the calyx usually resembles

a corolla and has from three to six divisions. There are from four to

nine stamens and a superior, mostly triangular, ovary, with two or

three styles or stigmas, becoming a dry, one-seeded fruit, generally

brown or black. The kind from which flour is made is cultivated

from northern Asia, and the name Buckwheat, from the German, means

"beech-wheat," because the grain resembles minute beech-nuts. There are

several common "weeds" belonging to this family, such as Dock, Sorrel,

and Smartweed.

Chorizanthes are low herbs, with branching stems, without stipules, the

leaves forming a rosette at the base and withering early. The small

flowers have six sepals and are clustered in small heads, usually one

flower in each papery involucre, which has from two to six teeth,

with bristles at the tips; stamens usually nine, on the base of the

perianth; styles three, with round-top stigmas.

[Sidenote: =Turkish Rugging=

_Chorizánthe fimbriàta_

=Pink

Spring

California=]

An odd, dry-looking plant, making pretty patches of purplish color on

dry mesas. The stiff, roughish, purplish stem is a few inches tall,

springing from a few dull-green or reddish root-leaves, branching

abruptly and widely towards the top and bearing many small flowers. The

involucres are deep-red or purple, with very prickly teeth, the sepals

bright-pink, prettily fringed with white and striped with deeper color,

and the filaments are long and threadlike, with purple anthers. The

flowers are exceedingly pretty when closely examined, though too small

to be very effective, but the plant as a whole is conspicuous both in

color and form. _C. staticoìdes_ is similar, but the sepals are not

fringed.

[Illustration: Turkish Rugging--Chorizanthe fimbriata.]

[Illustration]

There are many kinds of Rumex, or Dock, coarse herbs, with leafy,

branching, grooved stems, sheathed with conspicuous, papery stipules,

strong tap-roots and acid or bitter juice. The large leaves are

alternate, with smooth or wavy edges; the flowers small, greenish or

reddish, on jointed pedicels, in branching clusters; the stamens six;

the styles three, the stigmas shield-shaped, with a tuft of hairs at

the tip. The six divisions of the flower are in two sets, the three

outer small and green, the inner ones larger, colored and becoming

veiny and larger in fruit, forming valves or wings, (often with a grain

on the back of one or all of them,) which closely cover the three-sided

fruit. These wings make the fruits of Docks more conspicuous than the

flower. The Latin name comes from a word meaning "to suck," because the

Romans sucked the leaves to allay thirst.

[Sidenote: =Sand Dock=

_Rùmex venòsus_

=Greenish

Spring, summer

West=]

In favorable situations this is a very handsome member of a rather

plain genus, about a foot tall, with a smooth, stout reddish stem and

smooth, pale, blue-green leaves, that feel like thin rubber, with a

prominent mid-vein front and back. The small inconspicuous flowers

develop into clusters of showy valves or wings, wonderfully odd and

beautiful in coloring, resembling Begonia flowers. At first these wings

are pale green, but they gradually brighten until they are all shades

of salmon, rose-color, and red, fading to brown, and forming lovely

combinations of vivid color, particularly against the arid background

of the sand hills they frequent, and they last a long time in water and

are exceedingly decorative. If these wings, which are nearly an inch

across, are pulled apart, a three-sided akene, like a little nut, will

be found inside them.

[Illustration]

[Illustration: Sand Dock--Rumex venosus.]

[Illustration]

There are many kinds of Eriogonum, herbs or shrubs, natives of America,

mostly western, growing in dry places, very numerous and difficult to

distinguish. The leaves, without sheaths or stipules, are often covered

with white down and usually grow in a spreading cluster at the base of

the stem. The numerous small flowers, on very slender little pedicels,

have six sepals, thin in texture and usually colored, and form clusters

of various shapes, which emerge from more or less bell-shaped or

top-shaped involucres, with six teeth. There are nine stamens, with

threadlike filaments, often hairy, and a three-parted style with

round-top stigmas. The name is from the Greek meaning "wooly knees," in

allusion to the wooly joints of the stem.

[Sidenote: =Bottle-plant=

_Eriógonum inflàtum_

=Yellow

Spring

Southwest=]

This is a most extraordinary looking plant, with queer inflated,

hollow stalks, about two feet high, swelling larger towards the top,

and the branches, which are also swollen, sticking out awkwardly in

all directions and bearing a few minute, yellow flowers. The stalks,

which are pale bluish-green, suggest some strange sort of reed, but the

dark-green leaves, growing in a rosette at the base, are something like

the leaves of cultivated violets and seem entirely out of keeping with

the rest of the plant. This grows on the plateau in the Grand Canyon

and in similar places.

[Sidenote: =Swollen-stalk=

_Eriógonum elàtum_

=White, pink

Summer

Northwest=]

This is about a foot and a half tall and the stem is swollen, but not

so much so as the last, and the flowers are more conspicuous, forming

rather flat-topped clusters, about three-quarters of an inch across.

The tiny flowers are cream-white or pinkish, the buds are deep-pink,

and the stamens are long, with tiny, pinkish anthers. The leaves are

dull-green on the upper side and pale with close down on the under and

grow in a cluster at the base.

[Illustration]

[Illustration: Swollen-stalk--E. elatum.

Field Book of Western Wild Flowers · 第 87 / 319 题