Milium. CLXI. GRAMINEiE. 6(» 



very remote joints ; Ivs. lance-linear, 3 — 7 by 2 — 3", ciliate and hairy ; sUatlis 

 pubescent, upper one very long ; spike generally solitary, often 2, on a long, 

 very slender peduncle, sometimes with another scarcely exserted from the sheaths ; 

 spikelets plano-convex, with the flat side out, \" diam., about 2 on each very 

 short pedicel, appearing 2 — 3-rowed in the 1-sided spike. — Dry fields, Mass. ! to 

 Car. W. to Ky. Aug. 



2. P. L.EVE (and precox. Michx.) 



St. erect, rather firm, 18'— 3f high, glabrous ; Ivs. generally smooth, pilose 

 only at the base, broadly linear ; lower sheat/is sometimes hairy ; sjnkes 2 — 6, 

 alternate, spreading, with a few long, white hairs at the base ; .^pikelets in 2 

 rows ; rachis flexuous, flat on the back ; pedicels undivided, with one spikelet ; 

 spikelets twice as large (1^' diam.) as in the preceding; glumes orbicular-ovate, 

 1-veined. — Grassy banks of rivers, Penn. to Ky. and Ga. Aug. 



3. P. STOLONIFERUM. BOSC. 



St. about 2f long, procumbent at base, geniculate, stoloniferous and 

 branched ; Ivs. short, subcordate ; spikes very numerous (30 — 50), subverticillate, 

 spreading, in elongated, terminal and lateral racemes; common rachis 4 — 5' 

 long, angular, smooth, partial ones 3—15" long ; spikelets ovate, alternate. — Ce- 

 dar swamps, N. J., Pursh. July, Aug. 



18. Dl GIT ARIA. Haller. 



Lat. digitus, a finger; alluding to the digitate form of the inflorescence. 



Inflorescence digitate or fasciculate ; spikes linear, unilateral ; 

 spikelets in pairs, on short, bifid pedicels, 2-flowered ; glumes 2, the 

 lower very small, sometimes wanting ; lower flower abortive, with a 

 single, membranaceous palea ; upper flower 5 , with 2 cartilaginous, 

 Bubequal palece ; caryopsis striate. 



1. D. sANGuiNALis. Scop. (Pauicum sanguinale. Linn.) Purple Finger 

 Grass. Crab Grass. — Sts. decumbent at base, radiating and branching at 



the lower joints, 1 — 2f long ; lis. linear-lanceolate, on long, loose sheaths, softly 

 pilose, the sheaths strigosely hairy ; spikes 3 — 5' long, fasciculate at the top of 

 the stem, 5—9 together ; spikelets In pair.s, oblong-lanceolate, closely appressed 

 to the flexuous rachi.s, in 2 rows. — (T) Common in cultivated grounds, N. Eng., 

 W. Ind.! Aug.— Oct. 



2. D. GLABRA. Roem. & Schultz. (Panicum. Jand.") 



St. generally decumbent, rarely rooting at the joints, a foot long; Ivs. short, 

 flat, nearly glabrous; spikes digitate, spreading, 3—4; spikelets crowded, ovoid; 

 gluTne equaling the abortive flower, both hairy. — (i) Sandy fields, N. Y., Penn. 

 to Ohio ! Spikes rather more slender than in the foregoing. 



3. D. sKROTiNA. Michx. (D. villosa. Ell.) 



Jit. creeping; si. decumbent, 12 — 18' long, terete, hairy at the joints, form- 

 ing a dense carpet where it grows ; Ivs. linear-lanceolate, thin, and with the 

 sheaths, very pubescent with long hairs; .<:pikcs numerous, setaceous, 2 — 3' long; 

 .^pikelets all pedicellate ; lower glume very minute, the margin ciliate.— N. Y. 



4. D. FiLiFORMis. Ell. (Panicum. WilU.) 



St. erect, filiform, .simple, 12—18' high ; Ivs. .short, nearly smooth, narrow- 

 lanceolate ; Imccr sfuaths very hairy, upper glabrous; s^pikcs 2 — 1, filiform, erect ; 

 rrt<:A/5 flexuous; spikelds in "3s, all pedicellate; .^'^/mhr- solitary, ay long as the 

 abortive flower.-® Dr)', gravely soils, N. Y. to Ky. Aug. 

 19. MILIUM. 



Ccllir ynit, a pchhlc ; alluding to ito hard, turcid fruit. 



Inflorescence paniculate ; spikolct.s I -flowered ; glumes 2, without 

 involucre or awns : palenc 2, shorter than the glumes, awnlcs.-^, ob- 

 long, concave, persistent and cartilaginous, coating the caryopsis. 

 1. M. EKFiisuM. Sprco'ling MiUrt Grass. 



St. erect, simple, smooth, 5— 8f high, bearing a compound, difl'use panicle ; 

 /rs flat, 8—12' by i— 1', on smooth, striate sheaths ; hraiKhes of the panicle clus- 

 51* 



