GRAMINK.'E. 



436 



2. S. ju'ncea. 



Root creeping extensively ; stem erect, rigid, round, smooth, 1 — 2 feet high ; 

 haves convolute at the edges, spreading, in 2 rows ; spikes 3 — 5 ; peduncles 

 smooth ; rachis compressed ; loiver glvmc 3 times as long as the upper ; palui 

 obtuse, lower one shorter ; styles 2. Marshes and river banks. Ji. Aug. 



3. S. GLABRA. Mufi. 



Stem smooth, succulent, terete, 3 — 5 feet high ; leaves concave, erect, about 

 2 feet long, ^ inch wide at base, tapering to a long acumination ; spikes 

 10 — 15, erect'and appressed, alternate and sessile upon a triangular rachis ; 

 spikehts in a dense, double row. Marshes. Aug. Sept. 



Tribe 4. PANICE./E. 



Jnflme$r.ence spiked or panided. Spikdets 1 or (more, usually) H-Jlowered, one of the flowers 

 being sterile or imperfect. Glumes rtsually [membranareovs) cf a thinner textvre than thepalea, 

 ■which are more or less cartilaginous, the lower paJea half enfolding tlie upper, sometimes awned- 



16. PA'SPALUM. 

 Flowers in unilateral spikes ; glumes 2, membranaceous, 

 equal, subovbicular, closely pressed to the 2 paleae ; stigmas 

 plumose, colored ; carjopsis coated with the smooth, plano- 

 convex paleae. 



1. P. ciliatifo'lium. Mx. 



Stem decumbent, simple, slender, 1—2 feet long ; leaves flat, hairy and 

 ciliate, about 6 inches long, with hairy sheaths ; spike 1 (or 2, the second 

 being smaller than the other), terminal, on a long peduncle, somewhat looselj 

 3-rowed ; spikdets pedicellate, appressed, plano-convex. Sandy fields, not 

 common. Sept. 



2. P. seta'ceum. Mx. 



Stem erect, slender, smooth and purplish below,. 1—2 feet high; leaves 

 linear-lanceolate, hairy both sides; sheaths nerved, smooth, villous at the 

 throat; spike mostly solitary, on a very long, terminal peduncle, often with 

 another on a short peduncle from the same sheath ; spikehts plano-coaveiy 

 alternate, in 2 rows, with the flat side out. Sandy fields. Aug. 



17. MI'LIUM. 

 Inflorescence paniculate; spikelets 1-flowered ; glumes 2, 

 without involucre or awns ; palcce 2, shorter than the glumes, 

 awnless, oblong, concave, persistent and cartilaginous, coating 

 the carjopsis. 



1. M. EFFu'suM. Spreading Millet Grass. 



Siem erect, simple, smooth, 5—8 feet high, bearing a compound, diff"use 

 panicle; haves flat, 8— 12 inches long, i — I inch wide, on smooth, striate 

 sheaths; branches of the panicle clustered, horizontal, 1—6 inches long; 

 spikdets ovate, few and scattered; paha smooth and polished. Woods. 

 Plant pale green. Summer. 



2. M. PUNGENS. Toi-r. Dwarf Millet Grass. 



Stem erect, simple, rigid, 12 — 18 inches high ; Zra?7cs lanceolate, cauUiie very 

 short, pungent, at length involute, radical G— 8 inches long, erect, acute and 

 pungent; sheaths strmie, rough, tumid ; j9aw;V/e contracted, few-flowered ; 

 peduncles h\M ; ff I umes b.\\' nless ; palecs ha.hy, about equaling the glumes ; 

 style 2-parted. May. 



18. P A' N I C U M . 

 Glumes 2, unequal, the lower mostly very small ; flowers 2, 

 dissimilar, the lower abortive or sterile, with 1 — 2 paleae, the 



