3G0 



MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



Figure 502. — Alopecurus pratensis. Plant, X Yi\ 

 glumes and floret, X 10. (Henderson, Oreg.) 



8. Alopecurus howellii Vasey. (Fig. 

 508.) Annual; culms 15 to 30 cm. tall, 

 commonly geniculate at lower nodes; 

 sheaths, especially the uppermost, 

 more or less inflated; panicle oblong 

 to linear, 2 to 6 cm. long, 4 to 7 mm. 

 wide; glumes 3 to 3.5 mm. long, ciliate 

 on the keel, appressed-pilose on the 

 lateral nerves ; awn attached less than 

 1 mm. from the base of lemma, bent, 

 exserted 3 to 5 mm.; anthers orange, 

 about 1 mm. long. O — Wet 

 places, Oregon and California. This 

 species and the following are closely 

 related and may not be distinct. Both 

 have dwarf specimens with small pan- 

 icles short-exserted or partly included 

 in the inflated upper sheath. 



9. Alopecurus saccatus Vasey. 

 (Fig. 509.) On the average somewhat 

 lower than A. howellii, the upper 

 sheaths inflated, the panicle 2 to 4 

 cm. long, rather less dense, short ex- 

 serted or partly included; spikelets 4 

 to 5 mm. long, the awn exserted 5 to 



