784 Oedeb 156.— GRAMINBJE. 



pale of a second (abortive) flower, the upper pale and the lower glnmo 

 being obsolete.) — Inflor. an open panicle. 



M. elfusum 1. Culm upright, simple, smooth, 3 to 6 or 8f high; Ivs. flat, 8 to 

 12' by 6" to 1', on smooth, striate sheaths; branches of the panicle clustered, 

 spreading, remote; spikelets ovate, few and scattered, acute, about 1" long. — In 

 woods, Penn. to Can. and Wis. Plant pale green. Summer. 



17. AfflPHICAR'PUffl, Kunth. (Gr. dfi^i, both or twain, Kaptog, 

 fruit.) Spikelets (apparently) l-flowered and perfect as in Millium, but 

 of 2 kinds, terminal, deciduous and sterile, the radical fertile; glumes 

 2, lanceolate, acute, awnless, as long as the 2 coriaceous pales ; stamens 

 3 ; stigmas 2, plumous, purple. — 2t Csespitous, erect, strict, with erect, 

 lance-linear Ivs., the terminal fls. in a strict, contracted, slender pani-cle, 

 the radical fls. are each solitary, on a slender ped., and subterranean. 



A. Ptirshii Kunth. Pine barrens, N. Jer. (Long-a-coming, Jackson). Oulm 2f 

 high, glabrous. Lvs. 2 to 3' by 2 to 3", hairy, as well as the sheaths, the upper 

 sheath long and without a leaf. Pan. on a long, exserted ped. Spikelets ij'' 

 long, the radical ones 2J'', veiny, the glume clasping the longer, neutral, single 

 pale. Aug. (Millium Amphicarpon Ph.) 



18. PAN'IGUffl, L. Panic Grass. (Lat. panicula, the mode of 

 flowering, or panis, bread, which some species afford.) Glumes 2, un- 

 equal, awnless, the lower much smaller ; flowers 2, dissimilar, the lower 

 abortive or sterile, with 1 or 2 pales, the upper pale membranous ; the 

 upper ^ , with the pales cartilaginous, polished, equal, concave, awnless, 

 coating the caryopsis ; stamens 3 ; stigmas plumous, purple. — Diff'ers 

 from Paspalum in the presence of the lower (true) glume. Panieles 

 simple or compound. 



§ Bpikelets acute or pointed, very numerous, racemed in large panicles. (*) 



* Aboi-tive ilower neutral, consisting of a sinjrle palea. (a) 



a Panicle capillary, with the spikelets solitary Nos. 1, 2 



a Panicle not capillary, denso-nowered ^o. 3 



* Abortive flower neutral, consisting of 2 pales (pales), (b) 



b Panicle contracted, cylindric. Upper glume gibbous Nfl. 4 



b Panicle open, — Glume 8-veined. The 27mles equal.... No. 5 



— ^lume 5 to 7-veined, — longer than abortive flower Nos. 6, 7 



— shorter than abortive flower No. 8 



* Abortive flower stamihate, with 2 pales. Tall, very smooth Nos. 9,10 



§ Spikelets obtuse or barely acute, solitary, pedicellate, not numerous. (**) 



** Abortive flower (neutral) consisting of a single pale Nos. 11 — 13 



** Abortive flower of 2 pales, the upper small and scarious. (c) 

 C Leaves narrow, obscurely veined, 1 to 5" wide, (d) 



d Spikelets densely fringed with silky hairs ; fertile flower colored No. 14 



d Spikelets glabrous or sparsely pilous ; fertile flower white, (dd) 



dd Spikelets less than 1" long, roundish or oval ; glume B-veined.. .Nos. 15, 16 



dd Spikelets 1 to H" long, oval; glume 9-vcined Nos. 17,18 



Leaves broad; conspicuously veined, 5 to 20" wide, .(e) 



e Abortive flower usually staminate with 3 stamens Nos. 18, 19 



6 Abortive flower neutral, never with stamens, (f ) 



f Plant very -downy, with soft, dense, velvety hairs No. 20 



f Plant smoothish or pllons-olliate, branched or simple Nos. 21, 22 



§ Spikelets barely acute, in short (1'), dense, secund, alternate spikes. Southern Nos. 28, 24 



1 P. oapill&re. Culm nearly simple, assurgent and thick at base, 1 — 2f; his. 

 Imiry, broad-hnear, acuminate, 4 — 6' long; sheaths covered with Tmstly hairs; pan. 

 large, pyramidal, capillary, loose, expanding ; spikelets small (f " long), often pur- 

 ple, obhng-mate, purple, lanceolate, acuminate, smooth, on long, hispid peduncles ; 

 abortive fl. of 1 palea. — (D Melds and roadsides, TT. S. and Can. Aug. — Pani- 

 cles often If or more long, with a very light, airy appearance. la poor or shady 

 soils it is much reduced. 



,2 P. autumnSile Boso. Culm very slender, assurgent, 10 to 20f high; lvs. gla- 

 - irons, lance-linear, at length convolute, 2 to 3' long; sheaths glabrovs; pan. dif- 

 fuse, learded in the axils, with long, strict, roughish, capillary, l-flowered branches; 



