352 GRASS FAMILY 



b. Lemma awn-pointed or merely acute 



(1) Stems 3-10 ft. tall; spikes 4-15 in. long, 



thick E. condensdtus 



(2) Stems 2-4 ft. high; spikes 2-4 in. long 



(a) Spike densely hairy; spikelets 2 at each 



joint E. innovdtus 



(b) Spike not hairy ; spikelets usually 1 at 



some or all of the joints E. triticoides 



Eragrostis Beauvois 1812 Eragrostis 



(Gr. er, spring, agrostis, grass) 



PI. 45, fig. 26. 



Spikelets 2-35-flowered, flattened, in panicles ; glumes more or less 

 equal, keeled, 1 or 3-nerved ; lemma longer than glumes, keeled, 3-nerved, 

 palet shorter, 2-nerved or 2-keeled, usually persisting after the lemma falls ; 

 annual or perennial. 



1. Spikelets 8-35-flowered, 5-16 mm. long, 3-4 mm. 



wide ; lemma 3-4 mm. long E. major 



2. Spikelets 5-15-flowered, 3-8 mm. long, 1-2 mm. 



wide ; lemma less than 2 mm. long 



a. Stems .5-1.5 in. high; panicles 3-8 in. long, us- 



ually greenish E. Piirshii ■ 



b. Stems 1-3 ft. high ; panicle 6-24 in. long, purple E. pectindcea 



Eriocoma Nuttall 1818 Indian Millet 



(Gr. erion, wool, kome, hair) 



PL 46, fig. 20. 



Spikelets 1 -flowered, in panicles ; glumes broad, awn-tipped ; lemma firm, 

 oval to elliptic, densely silky-hairy and with a terminal awn ; perennial. 

 Stems 1-3 ft. high; panicle 6-12 in. long; spikelet 6-8 



mm. long E. cuspiddta 



Festuca Linne 1753 Fescue 



(The ancient Latin name) 



PI. 45, fig. 19. 



Spikelets 2-13-flowered, in racemes or panicles; glumes more or less 

 unequal, acute, keeled; lemma narrow, rounded on the back, 5-nerved, usu- 

 ally awned at the tip, palet little shorter ; annual or perennial. 



1. Spikelets 6-13-flowered ; stamens 2; annual F.octoflora 



2. Spikelets 2-10-flowered ; stamens 3 ; perennial 

 a. Leaves inrolled, 1-2 mm. wide 



