CHAETOCHLOA— DANTHONIA 349 



b. Perennial; panicle more or less interrupted, 5- 



16 cm. long C. compdsita 



2. Bristles at the base of each spikelet 5-16 C.glauca 



Chrysopogox Trinius 1820 Golden Beard 

 (Gr. chrysos, golden, pogon, beard, from the golden-yellow hairs) 



PL 46, fig. 33. 



Spikelets in pairs or 3's, in terminal panicles, 1 spikelet sessile and per- 

 fect, with 2 hardened glumes, a sterile papery lemma and a lemma and palet 

 enclosing a perfect flower, palet sometimes wanting; the lateral spikelet 

 stalked, staminate empty or reduced to plumy stalks alone ; perennial. 

 Stems 3-8 ft. high; panicle golden, 4-12 in. long; awn 



1-2 cm. long C nutans 



Cixxa Linne 1753 Indian Reed 

 (Origin and meaning uncertain) 



Spikelets 1-flowered in nodding panicles; glumes 2, keeled, acute, 

 lemma keeled, often short-awned on the back, palet shorter, 1-nerved, 

 stamen 1 ; perennial. 



1. Branches of the narrow panicle erect C. arundindcea 



2. Brancl.es of the loose panicle drooping C. latifolia 



Dactylis Linne 1753 Orchard Grass 

 (Gr. daktylos, finger, of little application) 



Spikelets 3-5-flowered, in spike-like panicled clusters; glumes thin, 

 ; unequal, keeled, tipped ; lemma larger than the glumes, 5-nerved, keeled, 

 the mid-nerve extended into a short awn, palet shorter, 2-keeled ; perennial. 

 Stems 2-4 ft. high; panicle 3-8 in. long; lemma 4-6 



mm. long D. glomerdta 



Danthonia DeCandolle 1805 Oat Grass 



(Named for Danthoine, a French botanist) 



PI. 46, fig. 7. 



Spikelets 3-several-flowered, in closed or open panicles, the axis ex- 

 tending beyond the flower; glumes 2, keeled, acute, nearly equal, usually 

 enclosing the spikelet ; lemma rounded, 2-toothed, the awn arising from 

 between the awned teeth, awn bent, flat and twisted, palet 2-keeled, obtuse 

 or 2-toothed ; perennial. 



1. Spikelets in a spike-like cluster with short, erect 

 branches 



a. Empty glumes 15-20 mm. long D.sericea 



b. Empty glumes 8-10 mm. long D. spicdta 



