GRASSES OF IOWA. 



33 



Second glume 7-9 nerved, 

 lanceolate, acute or sub-aris- 

 tate, scabrous on the back 

 ^ibove and ciliate along the 

 hyaline, infolded margins 

 above. Third glume about 

 as long as the outer ones, 

 lanceolate, acute, scabrous on 

 the back above and fimbri- 

 iate-ciliate along the mar- 

 gins. Fourth glume shorter 

 than the third, apex bifid, 

 ciliate on the margins above, 

 awned. Awn slender, a lit- 

 tle twisted, 2-4 mm. long. 

 Palea j-J as long as its 

 glume. Stamens and pistil 

 as in the sessile spikelet. 

 Sessile spikelet about 8-10 

 mm. long, more than twice 

 as long as the pedicels. First 

 glume rigid and very rough- 

 scabrous all over the back, 

 ciliate-scabrous along the 

 keels above. Second elume 



Fig. 23. Andropogon Tenriesseensts. Scribner. 

 Compressed and Strongly Tennessee Blue stem.— a, b, awned and pedicellate 



keeled, long acuminate spikelets : f ' flowerin s % l ™ e • awn at e- 

 pointed, scabrous on the sides and very rough on the keels, ciliate on 

 the narrowly inflexed margins above. Third glume a little scabrous on 

 the back above. Racemes as in A. provincialts. Hairs on pedicels and 

 joints yellow. Pedicels and outer glumes very rough scabrous. 



DISTRIBUTION. 



Iowa. Ames 102, 104 (Pammel, Stewart, Hitchcock) ; Green- 

 field (Stewart) ; Dakota City (Pammel) ; Amana 701 (Schadt) ; 

 Bartlett 780 (Baldwin, Pammel) ; Iowa City, Preston, Lake Edwards, 

 Hancock County (Shimek); Delaware County, Cameron, Arnold's 

 Park (Shimek). 



North America. Tennessee to Iowa, Nebraska and Texas. 



