GRAMINF,^. 



438 DIGITARIA'^ 



10. p. latifo'lium. 



Stem nearly simple, with the nodes retrorsely pilose ; leaves lance-ovatCj 

 clasping, somewhat pubescent; ptt'/i/>/e terminal, a little exserted from the 

 sheath, simple, pubescent ; spikelcts rather large, oblong-ovate ; abortive JloweT 

 staminate. Common in ditches, woods, &c. Jn. Jl. 



11. P. NERVO'SUM. 



Stem simple, smooth at the nodes, 3 — 4 feet high ; leaves broad-lanceolate, 

 smooth, a little ciliate on the margin, cordate at base, an inch wide with short 

 sheaths; pa?i/cZc much branched, smooth, many-flowered, pedunculate or 

 sessile, branches flexuo'js, somewhat spreading ; s'pikelels ohXong; abortive 

 fioioer staminate. Bogs. July. 



12. P. Dicno'TOMnM. Ph. 



Stem much branched and dichotoraous above, erector decumbent, 1 — 2 feet 

 high, branches fasciculate ; /caycs linear-lanceolate, smooth, very numerous, 

 ] — 2 inches long, ciliate at base ; panicles lateral and terminal, simple, capil- 

 lary, with loose, spreading branches; spikelels minute, ovoid-obtuse. Woods, 

 Variable. July. 



13. P. ni'tidum. Lam. 



StC7n erect, simple or branched, slender ; leaves few, remote, broad-linear ; 

 sheaths bearded at the throat; panicle capillary, terminal, smooth, the branches 

 few or numerous, somewhat verticillate ; spikelets small, oblong-ovoid, pubes- 

 cent, laiocr glume very small. This species appears to be liable to much 

 variation, and several forms are described differing m the degree oi' pubescence, 

 t)ie more or less expanding panicle, and in the stem being simple or more or 

 less branched. Woods and meadows. Jn. Jl. 



14. P. MACR0CA'RP0>f. To?r. 



Stem erect, simple, straight, 2 — 3 feet high ; leaves linear-lanceolate, erect, 

 Bubpilose beneath, 3 — inches long; sheaths hispid, villous on the margin, 

 with no stipules ; panicle rather compound, smooth, with few, spreading, 

 flexuous, subsimple branches; spikelets ovold-glohose ; abortive fiotccr neuiial. 

 Banks of Connecticut river. Mass. July. 



15. P. capilla're. 



Stem nearly simple, assurgent at base, 1 — 2 feet high ; leaves hairy, broad- 

 linear, acuminate, 4 — G inches long ; sheaths covered with hispid hairs ; 

 ■panicle large, pyramidal, capillary, loose, expanding; spikelets small, lanceo- 

 late, acuminate, smooth, on long, hispid peduncles; abortive fioioer of 1 palea. 

 Fields and roadsides. Aug. 



16. P. VERRUCO'SUM. 



Stem slender, decumbent and geniculate, branching from the base, 1 — 2 feet 

 high ; leaves linear, a few inches long, spreading, smooth ; panicle much ex- 

 panded, few-flowered, flowers verrucose ; abortive fiuwer of one palea, and 

 neuter. Swamps and thickets. Panicle terminal and lateral, loose and 

 capillary. Aug. 



17. P. virga'tum. 



Glabrous and often purple ; stem 3 — 5 feet high ; leaves long, linear-lanceo- 

 late, hairy at base ; sheaths striate ; stipule with long, white cilifB ; panicle 

 virgate, at length spreading, diffuse, very large ; floiccrs acuminate ; palea 

 of the abortive flower nearly equal, enfolding the purple stamens. Banks of 

 streams. Not common. Aug. None of these species are of much value in 

 agiiculture. 



19. DIGITA'RIA. 

 Inflorescence digitate or fasciculate ; spikes linear, unilater- 

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

 glunies 2, the lower very small, sometimes wanting; lower 



