174 FLORA OF TEXAS. 



with forking, setaceous, spreading branches. Leaves thin, 

 oblong, obtuse, narrowed at the base. FIovjcvs minute, 

 solitary or clustered in the forks of the branches, greenish. 

 A. DiCHOTOMA, Michx. Stem 4-10' high. 



SIPHONYCHIA, ToiT. and Gray. 



Sepals 5, united to the middle, concave and petal-like 

 above, obtuse or mucronate. Petals 5, bristle-like, inserted 

 with the 5 stamens on the throat of the calyx. Style slen- 

 der, 2-cleft. Utricle included. Seeds resupinate. Radicle 

 superior. Erect or diffusely prostrate herbs. Cyme dense- 

 flowered. Flowers white. 



S. Americana, Torr. and Gray. Stems prostrate, dif- 

 fuse, pubescent in lines; leaves lanceolate, narrowed at the 

 base ; the radical ones larger and crowded ; floiuers obovate, 

 solitai7 in the forks of the stem, and clustered at the end 

 of the branches ; sepals rounded and incurved at the apex, 

 the tube bristly with hooked hairs; petals minute. Stems 

 l°-3° long. Leaves sometimes ftilcate and incrusted with 

 brownish particles. Stipules small. June-October. 



STIPULICIDA, Michx. 



Sejmls 5, emarginate, white-margined. Petals 5, spatn- 

 late, 2-toothed near the base, longer than the sepals, with- 

 ering, persistent. Stamens 3, opposite the inner sepals. 

 Stijle very short, 3-parted. Capsule 1-celled, 3-valved, 

 many-seeded. A small perennial, with an erect forking 

 stem. Stem-leaves minute, subulate, with adnate, pecti- 

 nate stipules. Radical leaves spatulate, clustered, growing 

 from a tuft of bristly stipules. Flowers white, in terminal 

 clusters. 



S. SETACEA, Michx. Stem 3-6' high, branches spread- 

 ing and curving. Low, sandy counties. April-June. 



