417 



the 5th gm with al-neryed or nerve- 

 less palea & a hermaperodite flower. 



Genn* PHALARIS Linnaeus. 



L, syst ed 1 (1735) Gen. ed 1, 14 (1737). 



Ann or per grasses with flat Ivs and 

 spk-like, capitate or nar'ly paniculate 

 infl: spkt crowded, 1-fld: gm 5, the first 

 and second about in length, strongly 

 compressed laterally com wing-keeled, 

 3d and 4th much sm'er or rudimentary, 

 5th subtending palea similar to itself 

 and a perfect fl: sta 3: sty distinct: 

 grain oblg, free, smooth, enclosed in 

 the gm. 



P. AMETHYSTINA Trin, Mem ac Petersb 

 sr 6, 3:56 (1835). B 2:265. Vasey, CNH 

 3:42. Cal, Ore. 



Cu stout, tufted, 2-8 hi, from a per 

 rt: lys broad, sheaths oft p: panicle 

 spk-like, oblg, 1-2' Ig, dense, com p'lish: 

 spkt 3-3^" Ig: outer gm nar'ly winged, 

 straight, acutish: inner pair of gm 

 hairy, over % as Ig as perfect fl which 

 is 2" Ig or more. 



P. ANGUSTA Nees, Fl Bras 1:28 t 9, 

 Trin, sp Gram 1 t 78. B 2:265 as P. 

 intermedia var. angusta. Vasey, CNH 

 3:42. Ab 27. Da 18. Cruz. 

 PHALARIS ARUNDINACEA L. 

 L, sp pi 55. B 2:265. Ore, Mex, Arctic 

 Am, Atlantic coast. G, man ed 6, 639. 

 Vasey, CNH 3:42. 



Cu stout, 2-4 hi; Ivs flat, %' wide; 

 panicle 3-5' Ig, nar, the sh branches 

 spreading during anthesis, becoming ap- 

 pressed; spkt 2" Ig; outer gm acute, im- 

 perfect pair % as Ig as perfect fl. 

 P. CALIFORNICA H&A bot Beech 161. 

 B 2:265 as P. intermedia. 

 PHALARIS CANARIENSIS L. 

 L, sp pi 54. Da 18. B 2:264. Z 1:186. 

 P 1:93, Mig. Greene, Cal ac b 2:414, 

 Cruz, Da, Er 1:100, LA Co. Baja! G, 

 Man ed 6, 639. Vasey CNH 3:43. 



Cu 1-3 hi: Ivs flat, upper sheaths 

 much inflated: panicle 1-1%' Ig, ovoid, 

 very dense: outer broad, with a con- 

 spicuously winged keel, w on margin, 

 with a distinct g line within: 2d pair of 

 gm sm, lanceolate, smooth: perfect fl 

 silky-hairy. Canary grass. 



Cruz; S D; Baja! A widely naturalized 

 weed. 

 PHALARIS INTERMEDIA Bosc. 



Ex. Poir Encyc suppl 1:300. Br 1:205, 

 Cruz. B 2:264. Vasey CNH 3:42. 



Cu variable, stout or slender, lV-4 

 hi, smooth: Ivs sh, oft glau; sheaths 

 more or less inflated: spk-like panicle 

 1-4' Ig, ovoid to cylindrical: spkt 2%" 

 Ig: outer strongly winged on keel, acute: 

 2d pair of gm linear, hairy % as Ig as 

 perfect one, the latter long-pointed, 

 hairy, l:3d sh'er than outer gm. Tex; 

 Cal. 



Variety ANGUSTA Chapman. 

 B 2:265. Da 18. Vasey CNH 3:42 as P. 

 angusta. 



Cu stout, 2-3 hi: panicle cylindrical, 

 dense, 3-6' Ig, nar: spkt 2" Ig: outer gm 

 winged on keel, abruptly acute, serrulate 

 on keel, 2d pair linear, slightly unequal, 

 l-3d as Ig as perfect fl, latter l-3d sh'er 

 than outer gm and not Ig-pointed as in 

 P. intermedia. La, Tex, Fla, SD! 



418 



San Diego (Or 626) ; Florida. 

 PHALARIS LEMMONI Vasey. 



Cu rather slender, 3-10 dm hi, smooth; 

 sheaths smooth; glades 3-5 mm Ig, acum- 

 inate; ligule 6 mm Ig; spk dense, nearly 

 cylindric, sometimes slightly interrupted 

 or lobed; empty gm 4-5 mm Ig, acute or 

 acuminate; 2d pair about 1 mm Ig; flg 

 gm lanceolate, acuminate, about equaling 

 empty gm, pubescent; palea nearly as 

 firm in texture as its gm and a little 

 sh'er. 



Arizona; California. 

 P. MINOS Retz Obs 3:8. Ab 27. Af. 



Cu simple or somewhat branched, 4-10 

 dm hi, erect or decumbent at base, 

 smooth; sheaths com sh'er than the in- 

 ternodes more or less inflated; ligule 

 rounded, 2-6 mm Ig; blades 5-15 cm Ig, 

 4-10 mm wide, smooth or faintly sca- 

 brous; spk 2-8 cm Ig, dense; spkt 5 mm 

 Ig; empty gm more or less scabrous, 

 3-nerved, wing-keeled; 3d and 4th gm 

 subulate, hairy; 5th twice as Ig as the 

 3d and 4th, acuminate, pubescent with 

 Ig appressed hairs. 



Tribe AGKOSTIDEJE. Spkt all 

 hermaphrodite, 1-fld, gm 3, 1st emp- 

 ty or rarely 0, com exceeding or 

 equalling the 3d or fl^ gin in length; 

 rach sometimes prolonged behind 

 the pplea into a linked or plumose 

 bristle: palea com 2-nerved. 



A. flg gm awned or mucronate pointed. 

 Awn of flg gm terminal or from between 

 the teeth of the bifid apex, sometimes 

 in Epicampes. 



1. Awns 3-branched. Aristida. 



2. Awns simple. 



2. Awns articulate with gm. 



Awns com Ig, geniculate and twisted 

 below, persistent. Stipa. 



Awns sh, caducous, or 0. Epicampes. 

 b. Awns not articulate with the gm. 

 Muhlenbergia. 



Awn dorsal. 



1. Spkt articulated with pedicel below 

 empty gm. Polypogon. 



2. Spkt not articulated below empty gm. 



a. Empty gm saccate at base, several 

 times larger than the flg gm; infl spk- 

 like. Gastridinum. 



b. Empty gm not saccate, never ex- 

 ceeding flg gm more than a third. 



Empty gm smooth or minutely sca- 

 brous along keel. Agrostis. 



Empty gm more or less hairy; infl 

 spk-like. Alopecurus. 



B. flg gm awnless. 



1. Pericarp free from grain. Sporobolus. 



2. Pericarp closely adherent to grain. 



a. Empty gm abruptly awn-pointed. 

 Phleum. 



b. Empty gm not abruptly awn-pointed. 

 Agrostis. 



Genua ARISTIDA Linnaeus. 



L, sp pi ed 1, 82 (1753). 



Pis various in habit and infl, with 

 very nar, oft involute setaceous Ivs: 

 spkts nar, 1-fld: gm 3, nar, the 2 empty 

 ones carinate; 3d rigid and convolute, 

 bearing 3 awns, sometimes rudimentary 



