MANUAL OF THE GRASSES OF THE UNITED STATES 567 



Figure 1182.— Eriochloa aristata. 

 Plant, X 1; floret, X 10. (Thornber 

 98, Ariz.) 



Figure 1183.— Eriochloa sericea. 

 Plant, X 1; floret, X 10. (Rev- 

 erchon 1170, Tex.) 



2. Eriochloa sericea (Scheele) Munro. (Fig. 1183.) Perennial, in 



dense tufts; culms 

 simple, erect, 50 to 

 100 cm tall, the 

 lowermost sheaths 

 felty-pubesce nt ; 

 blades elongate, 2 

 to 3 mm wide, 

 flat or mostly in- 

 volute, densely 

 puberulent at the 

 junction with the 

 sheath; racemes 

 several, appressed, 

 somewhat distant, 

 usually not over- 

 lapping, mostly 1.5 

 to 3 cm long, the 

 rachis hirsute, the 

 pedicels with copi- 

 ous stiff hairs half 

 as long as the spike- 

 let; spikelets 4 mm 

 long, rather turgid, 

 short-villous, the glume and sterile lemma acutish; fruit 3 mm 



long, apicuiate. Ql — Prairies and hills, Texas 

 and Oklahoma. 



3. Eriochloa lemmoni Vasey and Scribn. (Fig. 

 1184.) Annual; culms decumbent at base, 30 

 to 60 cm tall; blades fiat, only the larger as much 

 as 15 cm long, 5 to 15 mm wide, velvety-pubes- 

 cent on both surfaces; racemes erect, the upper 

 overlapping, 1.5 to 3 cm long, the axis and rachis 

 densely villous, the pedicels with several long 

 hairs ; spikelets 4 mm long, rather 

 turgid, villous except the apex, 

 abruptly narrowed to a short ob- 

 tuse point ; fruit 3 mm long, slightly 

 apicuiate. o —Canyons, south- 

 ern Arizona and northern Mexico. 



4. Eriochloa procera (Retz.) 

 Hubbard. (Fig. 1185.) Annual; 

 culms spreading at base, 40 to 

 60 cm tall; blades flat, 2 to 4 

 mm wide; racemes loose, slender, 

 ascending, 3 to 5 cm long, the 

 rachis scabrous only; spikelets 3 

 to 3.5 mm long, appressed-pubes- 

 cent, except toward the tip, the 

 glume and sterile lemma acuminate; fruit 2 mm 

 long, the slender awn about 0.5 mm long. © (E. 

 ramosa Kuntze.) — Introduced on the university 

 campus at Tuscon, Ariz.; Cuba; tropical Asia. 



5. Eriochloa gracilis (Fourn.) Hitchc. (Fig. 1186, A.) Annual; 

 culms erect or decumbent at base, 40 to 100 cm tall; blades flat, gla- 



Figure 1185.— Erio- 

 chloa procera, X 10. 

 (Grifliths 1516, 

 Ariz.) 



Figure 1184.— Eriochloa 

 lemmoni. Plant, X 1; 

 floret, X 10. (Peebles 

 and Harrison 4703, Ariz.) 



