722 GRAMINEjE hibrochlob 



1 coleanthus 



6 HIEROGHIiOE Gmelin Fh Sib. i, 101. 



Panicle loose and spreading. Spikelets laterally compressed, 

 3-flowered, t-he-2 lower or lateral ones stamina te, the upper or 

 central one perfect. Glumes 5, the first and second about equal, 

 acute, glabrous'; the third and fourth somewhat shorter, obtuse, 

 entire, emarginate, 2-toothed or 2-lobed with or without an awn, 

 enclosing a palet and stamens ; the fifth often produced into a 

 short awn, enclosing a palet and perfect flower. Stamens 3 in 

 the staminate flowers', 2 in the perfect one. Styles distinct. Stig- 

 mas plumose. Grain free, enclosed by the glume. 



H. macrophylla Xburber: Bolander in Trans. Gal. Agr. Soc. 1864-65, 

 133. Stems 1-3 feet high forming large loose tufts, with leaves 12-18 inches 

 long by 4-10 lines wide, rough on the upper surface and margins: panicle 

 with rather distant branches ui pairs: glumes greenish along the veiy distinct 

 nerves, obtuse and bai-ely equalling the staminate flowers, th6 lower palets 

 of which are stroinghiy fringed on the margins, notched at the apex and often 

 with a, slight mucro or awn: perfect flower pubescent toward the apex, other- 

 wise smooth and shining: th^ flowering glume very obtuse and fringed on the 

 margin^. In forests, western Washington tb California. 



H. borealls R. & S. Syat. ii, 513. Stems 1-2 fe^t high, erect simple, 

 smooth: lower leaves elongated, 4-8 inches long, 1-3 lines wide; scabrous, 

 the upper ones )^-3 inches loBg: panicle 3-4 inches long, its branches 1-2 

 inches l<mg, usnally spreading, naked below; spikelets yellowish-brown and 

 purple, 3-3 lines long: lower' glomes glabrous; flowering glumes Pilous and 

 k strongly filiate, entirej awid-pointed; palets villous at the apex. Along 

 streams, Oregon to Alaska and the northern Atlantic States. 



Tribe V Agrostideas.' Spikelets all hermaphrpdite, one-flowered, 

 with one pair of empty ^lUitnes, or these rarely wanting, usually as 

 long as or exceeding the flowering glumes. rBachella .sometimes pro- 

 tonged behind the palet into a naked or pluriiose bristle, 



,/ 9 COLEANTHUS Seidel Keichenb., incon. I*!, Germ. i,'i77. 



Panicles simple or branched, the flowers in umbellate clusters 

 of slibrt 1-flowered rayd. Empty glumes wanting : flowering 

 glume membranous, 1-njerved, acuminately awned. Palet shorter 

 than the glume, with 2 divergent nerves, keeled, bifidjat the apex; 

 the divisions acuminate: scaled none. ' Stamens 2, with oblong 

 anthers. Ovary sessile, smboth. Stigmas sessile, denticulate 

 with subulate hairsi Gpain oblong, somewh»t longer than the 

 glutiiesi which are peraist^nl; and surround its.bstse. t 



C. snbtills Seidel 1. c. Stems slenden 1-3 inches long, forming loose 

 tufts 1-4 inches in diaiheter, decumbent and geniculate below, often branch- 

 ed, from an annual root: lease? abo^^t p.lines Ipng,. curved, smooth: Ugule 

 elongated, acute; sheaths all inflated: panicle 6-18 lines long; its biase includ- 

 ed in the upper sheath, mostly simple, with 3-4 umbellate clusteJs.^ometimes 

 with one or two short branches with an umbel at the end of each: -pedicels 

 longer than the spikelets, -scabrOius, glumes roughened on the keel. ■ On low 

 muddy flats aloflg the Columbia river-; also in northern' Eui'ope. :' ' 

 10 SPOROBOLUS R. Br. Prodr. Fl Hoi. i,' 169. 



Panicle open and pyramidal to narrow and spike-like. Spike- 



