Part 20

COMPOSITE FAMILY (Compositae)

Flowers crowded into heads surrounded by bracts; outer flowers often strap-shaped and are called ray flowers; inner flowers are tubular and are called disk flowers; sometimes flowers are all of one type; calyx usually modified into bristles or awns (pappus); petals united, tubular, 4-5-lobed; stamens 5, anthers united into a tube; styles 2-lobed; ovary 1-celled, inferior. (See p. xii.)

Baldwin’s Ironweed (Vernonia baldwinii) has broad, flat-topped clusters of purple heads. It forms a pleasing contrast to the abundant yellow flowers of the summer months. The plant is a hardy perennial and grows in ditches and river bottoms from Central Texas to Iowa. The stems are 3-4 feet high and conspicuously leafy. The ironweeds get their common name from the fact that the stems are very hard and difficult for farmers to chop down.

About one-fifth of the plants found in Texas belong to the composite family. It is generally divided into groups or tribes, the more important being the ironweed, mist-flower, aster, everlasting, sunflower, bitterweed, dog-fennel, and thistle groups. The composites in this book are grouped together in tribes in the above order, but the tribes are not separated or differentiated. Identification of composites is much easier if the resemblance to a particular group can be noted.

Bluff Thoroughwort (Eupatorium ageratifolium) is a widely branched shrub of the rocky hillsides of Central and West Texas. The bushes are covered with flat-topped clusters of pale-pink or white flowers. The long, protruding styles, which are divided into two recurved parts, have given the name of mist-flower to this and other plants of the group.

Milk-sick plant (Eupatorium ageratoides) is a closely related plant which causes in cattle a disease called “trembles.” The milk from affected cows will cause sickness and death among humans. The late-flowering thoroughwort (Eupatorium serotinum) is very abundant in river bottoms throughout the state. Yankee-weed (Eupatorium compositifolium) grows in big feathery clumps often 10 feet high. It is a pernicious weed in East Texas and soon covers cut-over pine lands. The dried flower-tops of several species were used by pioneers as fever medicines. One of these plants was called Joe-pye weed in honor of the Indian doctor, Joe Pye.

Blue Mist-Flower (Conoclinium coelestinum) is sometimes called ageratum and is used for a summer and fall border plant. It grows in moist, shaded places from Central Texas to New Jersey.

Prairie Blazing Star. Button Snakeroot (Laciniaria punctata) is sometimes called liatris from the scientific group to which these plants are sometimes referred. A similar prairie blazing star is called gay-feather. On the dry prairies in the western part of the state the blazing star has short stems and short spikes of flowers; but where moisture is more abundant, the plants are one to two feet high. The plant does well in cultivation and is easily grown from the seed. It ranges from Southern Canada to Texas and New Mexico.

The stems are closely covered with the narrow leaves, which are marked with minute glandular dots. The spikes are densely covered with long, narrow heads of purple flowers. There are only a few star-shaped tubular flowers in a head. The seeds are widely scattered by their crown of plumose bristles. The lovely spikes are often dried for winter bouquets.

Many eastern blazing stars are found in the woods of East Texas, where they make showy displays from July to October. They are called snakeroots from their reputed property of curing snake-bites. A tea made from the plant will cause profuse perspiration; the perspiration was probably responsible for the reported snake-bite cures. They are also called devil’s bit or devil’s bite, because of the bitten-off appearance of the rootstock. The rootstock was considered such a powerful remedy for human ills that the devil bit off a part for spite.

Tall Goldenrod (Solidago altissima) grows 2-8 ft. high, has rough leaves which are sharply toothed and prominently triple-nerved, and is topped by dense clusters of yellow flowers. Most of the goldenrods are widely distributed in North America; the tall goldenrod is abundant in dry soil from Maine to Nebraska and Texas.

Gray, Field, or Dwarf Goldenrod (Solidago nemoralis) has flower heads all turned to one side of the branches which top the slender wand-like stems. The stems are one half to two feet high. This is one of the most abundant goldenrods in the central and western parts of the state from July to November and ranges from Canada to Florida and Arizona.

In Texas the goldenrods are usually found only in moist soil, many eastern species growing profusely in East Texas. The three-nerved goldenrod (Solidago trinervata) is the common one in Southwest Texas.

Stiff or Hard-Leaved Goldenrod (Solidago rigida) is one of about thirty-five goldenrods found in the state. It belongs to the type which is responsible for the common name, as the yellow flowers are in heads arranged in rod-like clusters at the top of the stem. The scientific name of “Solidago,” meaning “to make whole,” had its origin in the healing properties of certain species.

The stiff goldenrod grows in dry rocky or sandy soil east of the Rocky Mountains from Southern Canada to Texas. It grows 1½-2 feet high and has broad leaves 1-2 inches long. Lindheimer’s goldenrod (Solidago lindheimeriana) is a similar stout, leafy-stemmed plant which is abundant in Central Texas and ranges to Kansas and Mexico. Bigelow’s goldenrod (Solidago bigelovii) is another species with rod-like clusters. It is found in the mountainous regions of West Texas and New Mexico.

Broom-Weed. Kindling-Weed (Amphiachyris dracunculoides) is a pasture pest in the southern part of the Great Plains region. The slender stem is unbranched near the base, but above the middle the numerous spreading branches form a flat-topped plant which bears many small heads of yellow flowers. The plants are often 2-4 feet high and grow in dense masses. It has been used as a broom by early settlers, Mexicans, and children at play. The resinous foliage of the dried plants was also highly valued for kindling fires.

The broom-weed is closely related to the rabbit-brush which is so abundant in West Texas and New Mexico. The Texas rabbit-brush (Gutierrezia texana) of West Texas is so much like the broom-weed that only a close observer can distinguish them. Both have 5-8 flowers with strap-shaped corollas in the outer part of the head and a few tubular flowers in the center; both bloom in the late summer and fall.

Camphor Daisy (Heterotheca subaxillaris), so called because of the camphor-like odor of the rough foliage, is a common summer pest to the farmer. The plants often grow 3 feet high and are much branched, bearing heads of golden-yellow flowers nearly an inch across. The upper leaves are broad and clasping, but the lower are narrowed at the base. The scientific name refers to the dissimilar fruits of the ray and disk flowers, those of the ray flowers having no bristles. It ranges from Delaware to Arizona and Mexico.

Texas Gumweed (Grindelia texana) belongs to a group easily recognized because of its sticky, bur-like heads and thick leaves. This one is common on rocky limestone slopes in Central Texas in the fall and ranges to Southwest Missouri. The wand-like stems, covered with the overlapping leaves, are topped by large heads of yellow flowers. Many gumweeds are found in Texas. Some of them were used to relieve colds, asthma, and rheumatism.

Big Gumweed. Saw-Leaf Daisy (Prionopsis ciliata) is easily recognized by its straight, stiff stalks which are closely covered with broad oval leaves. Dense masses of the sentinel-like plants may be seen along fence-rows in North-central and West Texas in August and September. It ranges north to Kansas and Missouri. The stems are topped by short clusters of large heads, 2-3 inches broad. The leaves are thick, gummy, and closely beset with bristle-tipped teeth. Sometimes an injury to the stem may cause it to become widely branched.

The scientific name means “resembling a saw” and refers to the leaf-margins. It is not a true gumweed but has similar bur-like heads. It differs from the gumweeds in having several unequal hair-like bristles on the seed, whereas the seeds of gumweeds have 2-8 stiff bristles.

Yellow Sleepy Daisy (Xanthisma texanum) is a yellow daisy with lazy habits, for the heads do not open until noon. It is close kin to the white lazy daisy (Aphanostephus skirrobasis), and the two may often be found growing in the same fields. The large heads of lemon-yellow flowers are quite showy and attractive, 1½ inches broad, solitary at the ends of the branches. The ray flowers are narrow, about one inch long, and conspicuously lance-shaped at the tips.

This plant blooms in the late spring and summer and is found on sandy prairies or open woods in Central Texas. It is an annual, the stem branched above, commonly about 1-1½ feet high. The leaves are glossy green, somewhat narrow, and one to two inches long. It has been introduced into cultivation in the North and East. The name is Greek, meaning “dyed yellow.”

Berlandier’s Golden Aster (Chrysopsis berlandieri) is common on roadside banks and prairies of Central and West Texas. Growing from a perennial root, the branched stems sprawl in clumps about a foot broad and are thick with yellow heads soon after a heavy rain. The heads are nearly an inch broad, the flowers all yellow. The leaves are whitish and somewhat woolly. It blooms in the summer and fall.

Spiny-Leaved Yellow Aster. Iron Flower (Sideranthus spinulosus) has yellow heads much like the preceding, but the leaves are quite different, being divided into narrow segments which are bristle-pointed rather than spiny as the name indicates. “Sideranthus” means “iron flower.” It is very abundant on prairies and hills in the western part of the state and ranges to Canada and Mexico. It blooms from March to October. The iron flowers are often called gold daisies. The southern iron flower (Sideranthus australis) is common in Southwest Texas.

White Lazy Daisy (Aphanostephus skirrobasis) grows very abundantly in sandy soil in spring and summer. It ranges from Kansas to Mexico and Florida. The morning traveller does not appreciate its beauty, for it is truly a lazy daisy, not opening its heads until nearly noon. The plants are usually branched and grow 6-18 inches high. The large, showy heads are 1-2 inches across and are usually long-stalked. Unlike those of many other daisies, the seeds are not topped by slender bristles but have an inconspicuous crown, as is denoted by the scientific name, which is Greek for “faint crown.”

Oak-Leaved Fleabane Daisy (Erigeron quercifolius) is very abundant in the spring in the East Texas woods and ranges through the Southern States. The lower leaves resemble oak leaves, but those on the stem are narrow and pointed. The numerous fleabane daisies in the state may be readily recognized by means of the many, very narrow ray flowers which are usually white, pale pink, or pale lavender. Kiss-me-and-I’ll-tell-you (Erigeron annuus) is a taller daisy and is very abundant in East Texas.

Dwarf Blue Aster (Keerlia bellidiflora) is a shade-loving, sprawling plant growing in moist soil in Central Texas. Its small heads, less than half an inch across, have the aster habit of closing at night and opening in bright light. The outer ray flowers are bluish-lavender, and the tubular inner flowers are yellow. It blooms from late March to May.