420 GRAMINACEJ2. 



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. 1|~ Culm erect, 6 10 

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



Millet-like Zizania. 



II. PHALARE-E. Spikelets perfect, polygamous or rarely monoe- 

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

 flower ; or 2-flowered, thejlowers perfect or sterile ; or 2 3-flowered, 

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

 Palecc often shining and indurated in fruit. 



3. CRYPSIS. Ait. Crypsis. 



(From the Greek icpvtyis, concealment ; the flowers being hidden in the sheath 

 of the leaf.) 



Glumes 2, compressed, unequal. Palese 2, unequal, longer 

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

 the palese. Panicle spike-like, oblong. 



C. Virginica Nutt. : culm procumbent and geniculate ; leaves at length 

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

 tis Virginica Willd. 



Sandy fields, near Philadelphia. Aug. Oct. .Culm 612 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 aAwrn?!, 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. 1|~ Culm simple, 2 4 feet 

 high. Leaves flat, smooth. Spike 1 finches long. Introduced from Europe. 



Common Fox-tail-grass. 



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

 cylindric, 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. aristulalus Mich. 



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

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

 linear-laooceolate, very acute. Spike nearly 2 inches long. 



Water Fox-tati-grass. 



