Descriptive Flora 



117 



orange flowers, and the fruit never being spiny. Flowers close 

 with the heat of the morning sun. Genus is named for 

 Kallstroem. 



Po' Hsra angustifolm (Engelm.) A. Gray. Guayacan. 



&tiff, scrubby, compact, evergreen, leafy shrubs with thick 

 stubby branches and beautiful violet-purple flowers. Leaves 

 compound, dark green, opposite. Leaflets 4 to 8 pairs, small, 

 narrow, entire, leathery. Flowers about %" across. Petals 5, 

 lilac to violet. Stamens 10, as long as the petals, unequal in 

 length. Ovary covered with pale silky hairs so that the older 

 flowers have a silky tuft in the centers. Pods 2-lobed, heart- 

 shaped, flattened, containing two shiny, orange colored seeds. 

 (Fruit in earlier stages is a hairy, flattened, short pod with a 

 long beak) . April. Widespread, in sand as well as on the lime- 

 stone hills. 



MALPIGHIACEAE. Malpighia Family. 



Thryallis angnstifolia (Benth.) Kuntze. Thryallis. 



An unusual plant with erect, slender branches 10 to 16" 

 long, tufted at the woody base and spired by red buds and 

 equally brilliant yellow, orange or red flowers. Leaves simple, 

 opposite. Blades toothless, linear to lanceolate above, oval to 

 oblong below, y 2 " to l 1 /^' long, different from other leaves in 

 having 2 minute glands at or near the base of the blade. Flowers 

 small, yellow soon turning red, blossoming up the lengthening 

 branches. Petals 5, about y± long, broad above and contracted 

 into thread-like bases below. Stamens 10. Pods small, 3-celled, 

 tipping short threadlike pedicels that branch off the upper part 

 of the main stems. Not common. On dry, usually rocky soil. 



RUT ACE AE. Rue Family. 



Thamnosma texana (A. Gray) Torr. Dutchman's Breeches. 



Low, tufted, leafy, blue-green aromatic plants, usually 

 shrubby close to the ground and sprinkled with small, yellow 



