CJKAMINE.i:. ((JUASS FAMII.V.) G4'> 



P. PRATEN8E, L. (TiMOTiiv. IIeki»'.s-Gkas8 ill Now Eiig. and N. Y.) 

 Tall; spike lonfjo/Iindricai ; lower glumes ciliate on the hack, tipped with a 

 short hristi(\ — Moailows, commonly cultivated for hay. (Nat. fronj Ku.) 



1. P. alpinum, L. Low; spike ovate-oblong; lower glumes strongly 

 ciliate on the hack, tipped with a rough aicn about their own Imrjth. — Alpine 

 tops of the White ^lountains, N. II., and high northward. (Ku.) 



27. ALOPECURUS, L. Foxtail Gkass. (PI. 7.) 



Spikelets I -flowered, jointed on the pedicel. Lower glumes boat-shaped, 

 strongly compressed and keeled, nearly equal, united at base, equalling or ex- 

 ceeding the flowering glume, which is awned on the back behjw the middle ; 

 palct mostly wanting ! Stamens .3. Styles mostly united. Stigmas long and 

 feathered. — Clusters contracted into a cylindrical and soft dense spike ; peren- 

 nial. (Name from aKdjirr]^, fox , and obpd, tail, from the shape of the spike.) 



A. TRATENsis, L. (Mkadow FoxTAii..) Cului U])right, Smooth (2° high) ; 

 the ui)per leaf much shorter than its inflated sheath ; spike stout, H - 2^' long ; 

 Jlowerinq (jlume ctpiallinij the acute lower cjlumes ; awn tJserted mure than half 

 its length, twistrd. — Meadows and pastures, eastward. May. (Nat. from Eu.) 



A. genicclAtis, L. (Floating F.) (PI. 7, fig. 1 -4.) Culm ascending, 

 often bent at the lower joints ; upper leaf as long as its sheath ; spike slender, 

 1-2' long; foirering glnme rather shorter than the obtuse lotcer glumes, the awn 

 from near its base and projecting from half to twice its length beyond it. — Moist 

 meadows, eastward. June -Aug. (Nat. from P^u.) 



Var. aristulatus, Torr. The awn very slender and scarcely exserted. 

 (A. aristulatus, Michx.) — In water and wet places; common. June- Aug. 



28. SPORCS BOLUS, R.Br. Drop-seed Grass. Rush-Grass. 



(PI. 7.) 

 Spikelcts small, 1- (rarely 2-) flowered, in an open or contracted or spiked 

 panicle. Lower glumes persistent, 1 - 3-nerved, not awned or pointed, the 

 lower smaller ; flowering glume of the same texture as the lower ones 

 (membranaceo-chartaceous) aiul usually longer than they, naked, awnless and 

 mostly pointless, I-nerved (rarely somewhat 3-nerved) ; pulet similar, 2-nerved. 

 Stamens chiefly 3. Stigmas simply feathery. Grain globular to oblong or 

 cylindrical, deciduous, often very thin, containing the loose seed. — Culms 

 wiry or rigid. Leaves involute, the throat usually bearded, and sheaths often 

 enclosing the panicles. (Name from airopd, seed, and pdWoj, to cast forth.) 

 ♦ Panicle contracted, of en simple ; grain oval or oblong ; perennial, except n. 2. 



1. S. asper, Kunth. Culms tufted (2-4° high); lowest leaves very 

 long, rigid, rough on the edges, tapering to a long involute and threa<l-like 

 point, the upper short, involute ; sheaths partly or at first wholly enclosing 

 the contracted panicle; flower much longer than the unequal lower glunus; 

 grain oval or oblong. (Vilfa s^\)cxii, Beauv.) — Sandy fields and dry hills, 

 especially southward. Sept. — Spikelets 2-3" long. Flowering glume and 

 palet rough above, smooth or hairy below, the palct tapering upward, acute, 

 and one half to twice longer th;\u the glume, or else obtuse and e(iualled or 

 even considerably exceeded by the glume ! 



2. S. vaginae fl6rus, Vasey. (PI. 7, fig. 4, 5.) Culms slender (6-12' 

 high), ascending; leaves involute-awl-shaped (1-4' long); panicles simple 

 and spiked, the lateral and often the terminal concealed iu the sheaths ; Jiower- 



