PHa.aris. | CLX1. GRAMINEZ. 607 
2. S. euauca. Palis. Bottle Grass. 
Si. 2—3f high; lvs. lanceolate, carinate, rough, hairy at base; sheaths 
striate, smooth ; stip. setose ; spike cylindric, yellowish-green, 2—4’ long; invol. 
of 6—10 fascicled, scabrous bristles much longer than the spikelets ; palea of the 
perfect fl. transversely rugose.—( Fields and roadsides, N. Eng. to Ohio. Jl. Aug. 
B. (8. purpurascens. FR. gS.) Sheaths and spikelets pilose—Penn. 
3. S. VERTICILLATA. Palis. 
St. smooth, about 2f high; dvs. lanceolate, rough-edged; sheaths smooth, 
hairy on the margin ; spicate panicle composed of short, divided branches in in- 
terrupted verticils, 2—3’ long; bristles of the imvol. in pairs, rough backwards; 
pale@ of the § roughish punctate.—@ Sandy fields, N. Eng. to Ohio. July. § 
4. S. Iravica. Palis. 
St. somewhat compressed, about 4f high; dvs. lanceolate, 1—2f long, an 
inch wide; sheaths roughish, pilose at the throat; spike compound, interrupted 
at the base, nodding, 6—8’ long; spikelets conglomerate; invol. of 2 bristles, 
several times longer than the flower.—@ Ditches, Mid. and S. States. July. 
5. S. Germanica. Palis. Millet. Bengal Grass. 
St. 2—4f high, simple, leafy ; dvs. lance-linear, flat, acuminate, serrulate 
on the margin; sheaths striate, close, pubescent; stip. bearded; spike compress- 
ed, yellowish, oblong-cylindric; rachis densely hirsute ; involucrate bristles 4—8, 
as long as, or longer than the spikelets, yellowish; glwmes unequal, ovate; & 
palee smooth, obscurely 3-veined.—@ In fields, not often cultivated. § 
23. CENCHRUS. 
Gr. xevxeos, millet; this grass bearing some resemblance to the millet. 
Flowers racemose or spicate; involucre burr-form, laciniate, echi- 
nate, persistent, including 1—3 spikelets; glumes 2, 2-flowered, outer 
smaller; flowers dissimilar, the lower sterile, the upper perfect ; 
scales 0. 
C. rripuLéines. (Also C. echinatus Linn.?) Burr Grass. 
St. 1—2f long, erect or procumbent and geniculate at base; Jvs. lance- 
linear, conduplicate, gradually acuminate, 3—5’ by 2—3’’; sheaths open, about 
as long as the colored joints; spike with the burr-like involucres approximate ; 
invol. cartilaginous, beset externally with many sharp, retrorsely hispid spines 
as long as itself and containing 2—3 spikelets; glwmes acuminate-mucronate, 
about 3” long, producing but 1 caryopsis.—@ Sandy soils, N. J. 
Trize 5. PHALARE#.—Inflorescence a contracted panicle. Spikelets 
solitary, with 1 perfect flower and 1—2 imperfect ones. Lower palea awned 
or mucronate, upper with two keels. 
4. PHALARIS. 
Gr. ¢a)apos, brilliant; on account of its smooth, shining seeds. 
Spikelets 1-flowered ; glumes 2, subequal, carinate; paleze 2, 
coriaceous, awnless, shorter than the glumes, coating the caryopsis, 
each with an external, accessory palea or abortive rudiment at base. 
1, P. arunDINacEa. (P. Americana. Torr.) 
St. erect, sparingly branched or simple, 2—5f high; Jvs. spreading, lanceo- 
late, yeined, rough-edged, on smooth, striate sheaths; panicle oblong, spicate, 
somewhat secund, 3—4’ long, glumes 3-veined, whitish, scabrous; rudiments 
pilose.—2 Common in ditches and swamps, Can. to Car. and Ky. A large, 
showy grass, but not valuable. July, Aug. 
8 picta is the well-known striped or ribbon grass, with beautifully variegated 
leaves longitudinally striped in endless diversity. + 
2. P CaNaRIENSES. Canary Grass. 
St. erect, or geniculate at the lower joints, round, striate, leafy; vs. lanceo- 
late; panicles spicate, ovoid, erect; ¢lwmes whitish, with green veins; rudiments 
smooth.—{D) Fields and pastures, not common, Jl. § | 
