422 GRAMINACES. 



III. PAMCEJE. Spikelets 2-Jlowered; the lower flower imperfect, 

 usually neutral, rarely staminale. Glumes of a thinner texture than 

 the palea ; the lower one often (rarely both) abortive. Palea more or 

 less coriaceous? mostly awnless ; the lower one concave. 



8. PASPALUM. Linn. Paspalum. 



(From the Greek Tro^aXo? , millet ; on account of the resemblance of its grain.) 

 Spikelets 2 -flowered. Glume single. Lower flower neutral, 

 of a single palea, membranaceous, awnless, as long as the glume. 

 Perfect flowers with 2 coriaceous awnless palese ; the lower 

 concave and embracing the upper. Stamens 3. Flowers in 

 unilateral spikes. 



1 . P. setaceum, Mich. : culm erect or decumbent, slender ; leaves and 

 sheaths hairy ; spikes mostly 2, the one on a long, the other on a short pe- 

 duncle from the same sheath ; spikelets in 2 rows. P. pubescent MuM. 



Sandy fields. N. Y. to Car. July, Aug. ^.Culm prostrate or erect, 12 

 feet high. Leaves narrow, mostly very hairy and ciliate on the margin. Ter- 

 minal spike on a peduncle which is 2 6 inches long. Hairy Paspalum. 



2. P. ciliatifolium Mich. : culm decumbent ; leaves hairy and ciliate ; 

 sheaths hairy ; spikes 1 2, rather lax ; spikelets indistinctly 3-rowed. P. 

 ciliatum Pursh. 



Sandy fields. Mass, to Car. Sept. 1].. Culm 18 inches long, slender and 

 simple. Spike mostly solitary, terminal. Fringed Paspalum. 



3. P. latve Mich.: culm erect, very smooth, rather stout: leaves short, 

 mostly smooth, hairy at base ; spikes 3 6, alternate ; spikelets in two 

 rows, ovoid-roundish, smooth. 



Dry meadows. N. Y. to Car. Aug. f l\.. Culm H 3 feet high. Leaves 

 broad-linear, long. Spikes usually 34, spreading ; rachis flexuous. 



Smooth Paspalum. 



4. P. stoloniferum Base. : culm prostrate at base ; leaves short, subcor- 

 date ; spikes in elongated racemes, somewhat verticillate, spreading ; flow- 

 ers serrulate-ciliate, transversely rugose. 



Cedar swamps. N. J. Aug. 1J-. Culm 2 feet long, branched, geniculate, 

 stoloniferous. Spikes very numerous (30 50.) Stoloniferous Paspalum. 



9. MILIUM. Linn. Millet Grass. 



(Supposed to be derived from the Latin mule, a thousand ; on account of its 

 fertility.) 



Spikelets 2-flowered. Glume single, membranaceous, con- 

 cave. Lower flower neutral, and consisting of a single palea re- 

 sembling the glume ; upper flower perfect, the paleee awnless. 

 Lower palea concave and embracing the upper. Stamens 3. 

 Panicle spreading. 



1. M. effusum Linn.: panicle diffuse, compound, branches horizontal; 

 glumes ovate, very obtuse ; palese awnless. smooth and shining. 



