Part 8

Pink Sensitive Briar (Leptoglottis uncinata) is also called pink mimosa and shame-vine, the latter name being given because of the leaf’s habit of closing when touched. The vines sprawl on the ground, growing out 2-4 ft. They are densely covered with small, recurved prickles. The leaves are divided as in other mimosas, having 4-8 pairs of divisions each bearing 8-15 pairs of short leaflets. The small, fragrant pink flowers are borne in dense heads. The pods are nearly round, densely covered with spines, and about 1½ in. long. It grows in dry soil from Virginia to Mexico, blooming in Texas in April and May.

Yellow Sensitive Briar (Neptunia lutea) is very much like the pink briar but has oblong heads of yellow flowers. The pods are smooth and flat and markedly narrowed at the base. The yellow briar grows in sandy soil from Oklahoma and Texas to Florida, blooming in June.

SENNA FAMILY (Cassiaceae)

Trees, shrubs, or rarely herbs; leaves usually once or twice pinnate; flowers mostly showy; sepals 5; petals 5; stamens mostly 10; ovary 1-celled; fruit a pod.

Texas Redbud (Cercis reniformis) is one of the handsomest shrubs of the limestone hill region of Texas and New Mexico. The pea-shaped flowers appear on last year’s wood in February or March, often remaining lovely for a month before the leaves appear. The leaves are a glossy green above, rounded and sometimes deeply notched or kidney-shaped (reniform), and usually 3-4 in. broad. The clusters of numerous red seed-pods are very conspicuous in the summer and autumn. The flat pods have a narrow wing on one side and are pointed at both ends, 2½-3 in. long and over ½ in. broad.

The Canadian or eastern redbud is found in the northern and eastern part of the state. It has smaller flowers and very pointed leaves. The western redbud grows in the mountainous region of the state and has similar leaves but smaller flowers.

The Asiatic redbud is called Judas-tree because Judas is supposed to have hanged himself from one of the trees. Redbud flowers, served either fried or pickled for salads, are sometimes eaten by people. It is an excellent shrub or small tree for highway and garden planting.

Two-Leaved Senna (Cassia roemeriana) gets its common name from the two spreading leaflets into which the leaf is divided. They are 1-2 in. long and have a slender stalk about the same length. The stems are commonly about 8-12 in. high, growing from a woody perennial root. The sparsely-flowered clusters of yellow flowers appear from spring until fall. The seed-pods are about an inch long and half an inch wide. This senna is very abundant from Central Texas into Mexico and New Mexico. It bears the name of Roemer, a geologist sent from Germany to study the geology of the grant made to the German colonists at New Braunfels. He was in Texas from 1845 to 1847, visited and botanized with Lindheimer at New Braunfels, and carried many new Texas plants back to Germany.

The senna group is very large and mainly tropical in distribution, many species being noted for medicinal properties. The coffee senna (Cassia occidentalis) and the American senna (Cassia marilandica) are common weeds in the eastern part of the state. The velvet-leaved or Lindheimer’s senna grows in the western part of the state.

Partridge Pea. Prairie Senna (Chamaecrista fasciculata) is also called large-flowered sensitive pea, dwarf cassia, and magoty-boy-bean. It blooms in the summer months and is very abundant in sandy soil in Central and Eastern Texas, ranging to Mexico and the northern part of the United States. The oblong leaves have 8-14 pairs of linear leaflets and a conspicuous orange or brown gland near the base. The flowers have five yellow petals, somewhat unequal and irregular in shape. Several buds grow on a short stalk between the leaves, but usually only one flower on the stalk opens at a time. It is an erect annual plant growing about 2½ feet high and often widely branched above. The pods are flattened, about ¼ in. wide and 2 in. long.

Several shrubs of the senna family are popular in Texas gardens, among them the bird-of-paradise (Poinciana gilliesii). It is a South American plant with showy yellow flowers which have 10 long brilliant red stamens protruding 3-5 inches from the flower.

Retama. Horse Bean (Parkinsonia aculeata) is also known as Jerusalem-thorn, shower-of-gold, and palo verde, the latter meaning “green timber” from the green trunk and branches. It forms a spiny shrub or small tree with long, graceful, somewhat drooping branches, bearing bundles of leaves and sprays of yellow flowers. The long divided leaves are somewhat unusual. The leaf-stalks are green, broad, and flattened, performing the functions of the small leaflets which often drop off quite early. The 5 yellow petals are almost equal, but one bears a honey gland at its base and soon becomes red, remaining on the stalk longer than the others. The pods are 3-5 in. long, very narrow and constricted between the seeds. It ranges from Central Texas to Mexico and tropical America, bearing a profusion of blooms through the warm months after rains.

Besides being a very ornamental shrub of value in landscaping, the plant has various other uses. The seeds are edible and have long been used as food by Indians, Mexicans, and many animals. Mrs. Quillin, author of Texas Wild Flowers, reports the use in the treatment of diabetes of a tea the Mexicans make from the branches and leaves.

KRAMERIA FAMILY (Krameriaceae)

Shrubs or perennials, leaves small; flowers irregular; sepals 4-5, petal-like; petals 4-5, smaller than sepals; stamens 3-4, united at base; fruit woody, armed with spines.

Prairie Sand-Bur. Linear-Leaved Krameria (Krameria lanceolata) is not the sand-bur of the grass family with which all children of the South are familiar; however, the burs are just as spiny, but are densely covered with white hairs. The flowers and short silky leaves grow on prostrate branches from a thick woody root. The 5 wine-red sepals may be mistaken for the petals which are smaller than the sepals and tinged with green, the 3 upper being united. The flowers are about an inch broad. The plant is not conspicuous but is quite abundant in dry, rocky soil from Kansas to Mexico, blooming from April to June.

Several shrubby kramerias grow in the southwestern part of the state. The name is in honor of an Austrian physician, Johann Kramer. Medicinal properties are reported for some of the species.

Chacate (Kameria grayi) is a densely branched shrub, 1-3 ft. high, with purple flowers. The bark of the root is used by Mexicans in dyeing leather a reddish-brown. It is found in the mountains of West Texas and Mexico.

PEA FAMILY (Fabaceae)

Leaves simple or compound; flowers pea-shaped; sepals 5, united in a tube; petals 5; stamens often 10 and united in 1 or 2 groups; fruit a 1-celled pod.

Texas Mountain Laurel (Sophora secundiflora) is an evergreen shrub or small tree growing on limestone hillsides from Texas to New Mexico and Mexico; it is particularly abundant in Southwest-Central Texas. The dense clusters of violet-blue flowers, at their best in the latter part of March but blooming earlier or later in different sections, are very showy against the glossy dark-green, leathery leaves. Many variations in color exist in nature from dark violet-blue to violet-tinged and white. The flowers have a strong, heavy scent which is disagreeable to most people. The brilliant scarlet beans, which mature in a few weeks, contain a poisonous alkaloid.

The Texas mountain laurel is not at all related to the southern mountain laurel (Kalmia latifolia), a rose-flowered shrub of the heath family. The sophoras have retained the Arabian name and include in their group many handsome ornamental shrubs, among which is the Japan pagoda tree. The Texas sophora can be readily grown from seed but is seldom successfully transplanted.

Bush Pea. Large-Bracted False Indigo (Baptisia bracteata) is sometimes called hen-and-chickens pea from the growth habit of the plant. The clusters of cream-colored flowers grow downward and peep out from the bushy leaf-growth. The flowers are about 1 in. long, and the 3 gray-green leaflets are 1-3 in. long. It grows on sandy slopes or moist prairies from the eastern part of Texas to Minnesota and South Carolina, blooming in Texas in April.

Texas Bluebonnet (Lupinus texensis) (see frontispiece) was widely known in pioneer days as buffalo clover. It grows in great abundance on limestone hillsides between the Brazos and Pecos Rivers from Dallas southward into Mexico. Seed-houses sell the Texas bluebonnet under the name of Lupinus subcarnosus, the bluebonnet of sandy areas. It has narrower flower spikes and rounded leaf-tips. Several other lupines are found in Texas but are not very common. The name is from the Latin meaning “wolf,” because it was thought the plants ruined the fertility of the soil. On the contrary, the lupines are excellent fertilizers, as the small nodules on the roots contain nitrogen-fixing bacteria which add to the soil nitrates. It blooms from March to early May. The bluebonnet was adopted as the state flower in 1901.

Indigo-Plant. Scarlet Pea (Indigofera leptosepala) has prostrate branches growing from a woody root. The short, erect spikes of scarlet, pea-shaped flowers are borne near the ends of the branches, blooming from early spring until late summer, their blossoms forming an ever-increasing scarlet circle after each rain. The leaves are divided into 5-9 leaflets, narrowed at the base and about half an inch long. A small amount of indigo may be extracted from the foliage. While this is not a very conspicuous plant, it is one of the most widely distributed in the state and ranges to Mexico, Kansas, and Florida.

The indigo-plant belongs to a large group, mostly tropical, and many species, as the name indicates, are indigo-bearing. Commercial indigo, now a coal-tar product, was formerly obtained from a shrub (Indigofera tinctoria) introduced for cultivation into South Carolina in 1742. Several shrubby species of indigo-plants are found in the state, but none of them are very abundant.

Golden Parosela or Dalea (Parosela aurea) may not be recognized at first glance as a member of the pea family, since the flowers grow in dense clusters at the top of erect branches, 1-1½ ft. high, which grow from a thick, woody root. The yellow flowers are small and pea-shaped, with a calyx which has slender, silky-plumose lobes. It may be found on chalky slopes of prairies from Texas to Missouri and South Dakota in June and July.

Several shrubby paroselas, very handsome when in full bloom, are found in the southwestern part of the state. Purple parosela (Parosela pogonathera) is a vivid, reddish-purple flowered species of the southwestern part.