248 FLORA OF TEXAS. 



pinnate leaves, and heads or spikes of white flowers borne 

 on axillary peduncles; leaves sensitive. 



]). DEPRESSUS, Humb. and Bonpl. Stems slender, pros- 

 trate, sprinkled with hairs, shrubby at the base; pinncB 2 

 pairs ; leaflets oblong-linear, very obtuse, oblique and almost 

 truncate at the base, hairy on the margins ; peduncles 2-4- 

 flowered, the two upper flowers (sometimes all) perfect; 

 stamens 10; legume linear, many-seeded; seeds angular, 

 compressed. Stem l°-2° long ; legume 1-1^' long. 



D. DiFFUSUS. Stem somewhat shrubby, prostrate; 

 pinncB 4-5 pairs ; spikes few-flowered, capitate ; floioers 

 pentandrous ; legume narrowly linear, 2' long. 



D. LEPTOLOBUS. Hcrbaceous ; stem ascending, angled ; 

 jnnncB about 10 pairs, with a small gland at the base of 

 the lowest or two lower pairs; leaflets about 24 pairs, linear, 

 slightly ciliate ; stipules setiform ; peduncles solitary, few- 

 flowered, not bracteate, much shorter than the leaves; 

 floivers pentandrous, all perfect ; legumes usually several 

 from each head, narrowly linear, subulate-acuminate, slight- 

 ly falcate, 6-8-seeded, somewhat intercepted between the 

 seeds, thrice the length of tlie peduncles ; seeds linear-ob- 

 long, nearly glabrous. Stems 2°-3° high ; heads usually 

 ripening 4— 61egumes, which are 2-3 inches long, and about 

 a line in width; seeds placed lengthwise in the pod. — 

 Drummond. 



D. STRicTus. Suffrutescent at the base ; stems ascending 

 and somewhat angled ; leaves short ; pinnce 3-4 pairs, with 

 an oval concave gland at the base of the lowest pair; 

 leaflets 6-8 pairs, linear-oblong, ciliate ; stipules setiform ; 

 peduncles solitary, not bracteate, nearly the length of the 

 leaves, few-flowered heads subglobose; floioers nearly all 

 l^erfect, decandrous; legumes linear, straight or some- 

 what falcate, acuminate, longer than the peduncles, about 

 8-seeded; seeds oval. Stem l°-2° long; leaves small and 

 short; legumes I'-l^' long. — Drummond. 



