420 GRAMINACEiE. 



2. Z. miliacea Mick. : panicle effuse, pyramidal ; sterile and fertile flowers 

 intermixed ; style 1 ; palese with short awns ; caryopsis ovate, smooth. 



Swamps, &c, Penn. to Car. W. to Ark. Aug. %. — Culm erect, 6 — 10 

 feet high. Leaves very long, narrow, glaucoas. Panicle terminal, large. 



Millet-like Zizania. 



II. Phalareje. Spikelets perfect, polygamous or rarely monoe- 

 cious ; either 1-Jiowered, with or without a rudimentary stipe-like 

 flower ; or 2-Jlowered^ the flowers perfect or sterile ; or 2 — S-flowered, 

 the terminal flowers perfect, the rest imperfect. Glumes mostly equal. 

 PalecB often shining and indurated in fruit. 



3. CRYPSIS. Tli^.— Crypsis. 



(From the Greek npi^ipis, concealment; the flowers being hidden in the sheath 

 of the leaf.) 



Glumes 2, compressed, unequal. Paleae 2, unequal, longer 

 than the glumes. Stamens 2 — 3. Caryopsis loose, covered by 

 the paleae. — Panicle spike-like, oblong. 



C. Vtrginica Nult. ; culm procumbent and geniculate ; leaves at length 

 involute, rigid, pungent ; spike oblong-cylindric, thick and lobed. Agros- 

 tis Vtrginica Willd. 



Sandy fields, near Philadelphia. Aug. — Oct. (1). — Cidm 6 — 12 inches long, 

 branched from the base. Leaves short, filiform, nearly smooth and somewhat 

 glaucous. Spikes closely sheathed, axillary and terminal. Virginian Crypsis. 



4. ALOPECURUS. Linn.— Fox-tail Grass. 



(From the Greek aXwnri^, a fox, and ovpa, a tail ; in allusion to the form of 

 the spike.) 



Spikelets 1 -flowered. Glumes 2, boat-shaped and keeled, 

 awnless, nearly equal, united at base. Lower palea membra- 

 naceous, compressed, with the margins united below, awned on 

 the back below the middle ; upper palea wanting. Styles often 

 connate at the base. — Panicle spiked, cylindric, terminal. 



1. A. pratensis Linn.: culm erect, smooth; spike cylindric, obtuse; 

 glumes ciliate, connate below the middle, as long as the palea. 



Fields and pastures. N. S. ; 'rare. May — Aug. %. — Culm simple, 2 — 4 feet 

 high. Leaves flat, smooth. Spike IJ inches long. Introduced from Europe. 



Common Fox-tail-grass. 



2, A. geniculatus Linn. : culm ascending, geniculate at base ; spike 

 cyUndric, obtuse ; glumes cuneate at base, obtuse, hairy on the back and 

 margin ; awn twice as long as the flower. 



var. aristulatus Torr. : awn scarcely exserted. A. aristndatus Mich. 



Wet meadows. Arct. Amer. to N. Y. W. to Ohio ; rare. June. %. — Culm 

 12 — 18 inches high, knee-jointed and rooting below, lerete, smooth. Leaves 

 linear-lanceolate, very acute. Spike nearly 2 inches Ion?. 



Water Fox-tail-grass. 



