46 MISSOURI BOTANICAL GARDEN 



[P. 78] villosa 2. aristis basi villosis, calycibus villosis, floribus 



paniculatis, pedunculis longis. 



Elliott suggests that this is Andropogon nutans L. 

 The description applies to this species very well, although 

 the awn is scarcely villous at the base nor are the emply 



g 1 



however, villous. 



The sterile pedicels are, 



diffusa 3. aristis nudis, panicula diffusa, floribus parvis. 



Elliott refers this doubtfully to his Agrostis sericea 

 (Muhlenbergia capillars Trin.). It probably is this 

 species, which is common in that reo-i 



O .on. 



spicata? 4. aristis nudis, receptaculo elongate in spicam 



dentibus bifloris phimosis, floribus alternis 

 muticis, alternis aristatis; calycibus alter- 

 nis concavis, alternis convexis. 



This may be Andropogon tener Kunth, though the 

 spike is not plumose. 



A 



pogon from the spikelets in pairs, one awned and one 



ft % ^ *▼ *^ ^\. r^% *^« 



awnless. 



39. Aira. Cal. 2-valvis, 2-florus. Flosculi absque in- 



terjecto rudimento. 



purpurea 1. culmo erecto; foliis subulato-setaceis ; pani- 

 cula sparsa, floribus purpureis; corollae 

 glumis, alia plana bifida nervo aristata, alia 

 integraplumosa extus concava. 



No specimen in herbarium. The name is used by 

 Pursh and Elliott. It is Triplasis purpurea Chapm. 



