GRAMINE^E. 



321 



spikelets pubescent, green ; paleae of the lateral flowers ciliate on the margin, 

 one with a bent awn ; the other with a short, straight awn below the tip. An 

 early grass in fields, fragrant when drying. May- June. 



20. Phalaris. Spikelets in dense panicles, with i perfect flower, 

 and 2 neutral, abortive rudiments at base. Glumes 2, equal, longer 

 than the 2 coriaceous, awnless paleoe which inclose the compressed 

 grain. 2f 



P. ARUNDINACEA (Canary Grass). Culm tall, erect, simple or branch- 

 ing ; leaves lanceolate, rough on the margin ; panicle contracted, oblong, 

 branching ; branches somewhat spicate, densely flowered, at length some- 

 what spreading ; rudimentary flowers hairy, much shorter than the perfect 

 ones. In wet grounds, 2-5 feet high. July. 



21. Paspalum. Spikelets roundish, flat on the under side, convex 

 above, in several rows, on one side of a flattened rachis, apparently i- 

 flowered, with only a single glume. Paleoe 2. Stigma plumose, col- 

 ored. 2f 



P. SETACEUM (Wild Millet}. Culm slender, decumbent or ascending, 

 simple or branching at base ; leaves linear-lanceolate, flat, ciliate, and with 

 the sheaths softly hairy ; spikes mostly solitary, very slender, terminal one 

 on a long, very slender peduncle ; lateral ones often with included peduncles ; 

 spikelets orbicular, in 2 rows. Weed in sandy fields, 1-2 feet long. August. 



22. Panicum. Spikelets panicled, racemed, or somewhat spicate, 

 I neutral or staminate flower, and I perfect flower. Glumes 2, usually 

 .minute, sometimes wanting. Lower flower with a single palea usually 

 awnless, sometimes awned, rarely with 2 paleoe ; upper flower perfect, 

 with 2 awnless palece which inclose the free grain. Stigmas plumose, 

 mostly colored. 



1. P. SANGUINALE (Crab Grass). Culms decumbent at base, rooting at 

 the joints, then erect ; leaves linear-lanceolate, and with the sheath somewhat 

 hairy ; spikes 3-12, in digitate, terminal clusters ; spikelets mostly in pairs, 

 oblong ; upper glume shorter than the flower. Troublesome weed in culti- 

 vated grounds, 1-2 feet high. 



2. P. CAPILLARE (Hair Panic Grass}. Culm erect, simple above, often 

 branched at base ; leaves broad-linear, hairy as well as the sheaths ; panicle 

 very large, pyramidal, very loose, with numerous capillary branches ; spike- 

 lets small, on long, slender pedicels ; neutral flower consisting of i palea, 

 much longer than the perfect flower. In cultivated grounds, 1-2 feet high. 

 August. 



3. P. LATIFOLIUM (Broad-leaved Panic Grass). Culm erect, smooth, 

 nearly simple, usually bearded with soft hairs at the nodes ; leaves oval-lan- 

 ceolate, cordate and clasping at base, nearly or quite smooth, except at the 

 usually bearded throat ; panicle loose, short, on an exserted peduncle, with 

 short, nearly simple, spreading branches. In thickets and damp woods, 1-2 

 feet high. June- July. 



