49 
often pubescent on the lower sheaths; leaves short, 1 to 2 inches long, narrow, race- 
mose, the branches short and 2-{lowered; empty glumes very unequal, the lower 
4 to 5, the upper 6 to 7 lines long, floral glume 3 lines to the articulation, including 
the very sleuder sharp stipe; awn slender, capillary 6 to 9 lines long and twisted to 
the division of the equal 1} to 2 inches long awns.—Southern California to Arizona 
and Mexico. Said to be known to the Mexicans as Hare’s grass.” 
Var. FUGIT)VA, differs from the type chiefly in the lower and more condensed habit, 
and in the longer empty glumes, Late in the season it is loosened from the sand and 
blown about by the wind.—Colorado Desert (CO, &. Orcutt). 
STIPA Linn. 
Spikelets L-flowered, terete, spicate or panieulate. Outer glumes 
membranaceous, keeled; tlowering glume narrow, coriaceous, rigid, in- 
volute, with a simple, twisted awn from the apex; palet usually small 
and inclosed by the flowering glume, Stamens generally 3. The flower- 
ing glume has a hardened, often sharp pointed and bearded pedicel or 
stipe at its base. 
A. Panicle narrow, branches short, 
1. $. Kingii Thurb. 
2, §. tenuissima Trin. 
3. 5. viridula Trin. 
4. §. occidentalis Thurb, 
5, 3. stricta Vasey. 
B. Panicle more open, branches erect. 
G. S. Stillmani Bolander. 
7. S. coronata Thurb. 
8. S. speciosa Trin. & Kupr. 
9, §. Parishii Vasey. 
10. S. Scribneri Vasey. 
C. Panicle open, lower branches spreading. 
11. S. comata Trin, & hupr. 
12. S. spartea Trin. 
13. S. pennata Linn. 
14. S. leucotricha Trin. 
15. S. setigera Iresl. 
16. S eminens Cav. 
7. S. avenacea Linn. 
18. S. flexuosa Vasey. 
19. S. Bloomeri Boland. 
20. S. caduca Scribn. 
21. S. Pringlei Scribn. 
92, S. Richardsoni Link. 
23, S. Mongolica Turez. 
A, Panicle narrow, branches shoré. 
1. S. Kingii Thurb. Bot, Cal. 1. p. 287. Culms tufted, 6 to 20 inches high, 
covered below by the remains of numerous sheaths, slender, smooth, with but two 
nodes near the base; radical leaves half to two-thirds as long as the culms, setace- 
12074—No, 14 [Feb. 25, 1892.] 
