ORDER 155. GKAMINE^E. 



Ilairs copious silky, longer than the gl. Sta. 1 Nos. 13 



% Hai.rs shortor than the glumes. Sta. 3 (1 in No. 4). . . (a) 



a Spikes digitate. 2^4 together at summits Nos. 4, 5 



a Spikes single, one at the top of each branch Nos. 6 8 



a Spikes clustered, paniculate; awns very long No.9 



1 A. macroiirua MX. Culm erect, 2 3f, much branched ; , 



ppkl. very delicate, in pairs, with a spathe, very many, 

 forming a den? e leafy, silky panicle ; sterile spikelet only 

 a pedicel ; 5 awn a straight bristle, 8", hairs 4". Wet 

 grounds, N. Y., and S. Sept. + 



2 A. Vlrginicus L. Culm triangular, tall (3 5f), the; 



upper half loosely paniculate and nodding; spikes (like 

 No. 1, light and feathery, 1', two from each spathe) scat- 

 tered ; sterile spikelet a mere pedicel ; awns 9" ; spathe 2'. Dry soils. 



3 A. areuteus Ell. Culm purplish, slender, 1 3f; branches 1 or 2 at each upper 



node, each with a pair of spikes 1215" long at top : fls. concealed by the silvery - 

 white hairs ; awn 78". No spathe. Dry soils, Va., and S. Sept.; Oct. 



4 A. tetrastychus Ell. Culm erect, 2 3f ; leaves and sheaths very hairy ; branches 



1 or 2 at each node, each with 4 (rarely 2) spikes at top ; sterile spikelet an awnliko 

 glume only ; glume serrulate ; awn 4 times its length. Low lands, S. Sept. 



5 A. furc-atiis Muhl. forked spike. Culm erect, 4 7f; Ivs. and sheaths glabrous; 



spikes purplish, digitate, in 2's 5's, 35' long; spkl. appressed, the stalked one J; 

 awn of the 5 flower bent, 8 10" long. Meadows and prairies : common. August. 



6 A. teller (Nees). Culms 2 3f, slender, rigid ; leaves narrow, rigjd ; spikes erect, 2, 



slender; spkl. appressed ; pedicellate fl. neuter; 5 awn bent. 4 6". Dry barrens. 



7 A. ciiiattis (Nutt.) Culms 3 4f, with long linear Ivs. ; spikes 3 6', on long ped 



icels ; hairs close-pressed, white; spkl. awnless, the stalked one 6 . Damp. S. 



8 A. soopariiis MX. Bicom G. (a) Culm 3f, erect, with erect, often fascicled 



branches; Ivs. more or less hairy; spikes sii-gle on the filiform pedicels, loose, 6-12- 

 flowcred, hairs spreading nearly as long as the fls. ; o awns <>" long, twisted ; stalked 

 flower (6) neuter, or (in ft. H-tle:) (d) staminate. In dry ft-kls, forming tufts. 



9 A. melaiiocarpus (Muhl.) Culms 4 8f; Ivs. glabrous; spikes numerous, clus- 



tered ; spkl. many, large, each from a subulate spathe, the 2 lower spathes longest, 

 glume-like ? awn 3 1' long, twisted. Fields, Ga., Fl. Sept. -h 



75. SORGHUM, Pers. BROOM CORN. Spkl. in 2's and 3's, panicled , 

 the middle spkl. complete, 2-flwd., lower fl. abortive. Lateral or lower 

 spkl. sterile. Glumes coriaceous, pales membranous. Sta. 3. Otherwise 

 like Andropogon. Culms simple. 



1 S. mitans (L.) Indian G. Wood G. Culm 2 4f ; pan. elongated, 1020', narrow, 



nodding; spkl. all tawny, the sterile reduced to mere pedicels in contact with the 5 , 

 all bristly ciliate ; awn contorted, longer than the flower. 2; Dry : common. 



2 S. SACCHARATUM. Broom Corn. Culm thick, solid, 6 lOf ; leaves broad, downy at 



base ; panicle large, diffuse, with the slender branches whorled ; glumes hairy, 

 persistent. (T; E. Indies. 



3 S. VULGARE. Indian Millet. Culm erect, G 12f, round, solid ; leaves broad, keeled 



pan. compact, erect, oval ; glumes and pales caducous, fruit naked. E. Ind. The 

 Sugar Sorghum is regarded as a variety of this species. 



76. COIX LACRYMA. JOB'S TEARS. Culm 1 2f, solid, with erect, 

 slender branches clustered in the upper sheaths ; leaves lanceolate. Spikelets few in the 

 ho:t spikes, awnless, the lowest enclosed in an involucre which becomes ovoid, bony, 

 polished, and bluish-white, likened to a falling tear. Gardens. From E. Indies. 



