TRIANDRIA. DIGY^SflA. 11 



tt Flowers in spilces. 

 Ct5- For PHLErM, or Timothy, see Appendix of cultivated plants. 



38. DIGITARIA. Nutt. Gen. 82. 



[Lat. Digitus, a finger; the spikes being digitate, or fin'^er like;] 

 Cal. 2 or 3 valved, unequal. Cor. 2 valved, oblong-ovate, terete, awnless. Styles long; 

 D. sAWGUiNALis. Ml- Spikes expanding; spikelets 2 flowered, one sessile; stem decumbent. 

 Synon. Panicum sanguinale. IVilld. I 'it/g:o— Crab-grass. Finger-grass: 



Fl. Latter end of July. Fr- mat. Middle of September, and after. 



Hab. Fields, roadsides, &c. common. 12 to 18 inches long; of a purple color. 

 D- FiLiFORMis. Ell- Spikes erect, filiform; spikelets 3 flovpered, all pedicellate; stem erect. 

 Synon. Panicum filiforme. IVitld. 



Fl. Latter end of August. Fr. mat. Beginning of October.. 



Mab. Sandy banks, and roadsides: frequent. 1, to 2 and 3 feet high; slender. 



39. PASPALUM. Nutt. Gen. 84. 



[Paspalos, an ancient Gr. name for millet; which this plant resembles, in its seeds.] 



Cal. 2 valved, equal, orbicular. Cor. 2 valved, same size and figure. iSfig-mas plumose. 

 p. PTJBESCENS- Mahl. Leaves and sheaths villous; spike mostly solitary, terminal, on a long peduncle. _ 

 Synon. P. setaceum. 3Ix. Ell. Ph. &c, 



Fl. Middle of August. Fr. mat. Last of September. 



Hab. Fields, roadsides, &c. common. 1 to 2feet high; slender. 



Obs. I incline to prefer Muhlenberg's specific name, as most appropriate. 



P. LiEvE. Ph. Glabrous; spikesseveral, 2 to 6, alternate; sheaths compressed; ligula ciliaie. 

 Fl. Beginning of August. Fr. mat. Latter end of September. 



Hab. Grassy banks, along the Brandy wine: frequent. 2 to 3 feet high. 



Obs. Dr. Baldwin thoug;ht this was the P. vir^atum, o( Walter. The description, however) of th* 

 p. Itcve, as given in Pursh, fits my specimen exactly. 



b. Calyx 2 valved, 2 or ^ flowered: floioers scattered. 



40. TRISETUM. Nutt. Gen. 89. 



[A name literally meaning three bristles, or awns; characteristic of the genus.] 



Cal. acuminate, and carinate. Cor. outer valve setaceously bifid; with 1 longer straight doreal awa. 



T. prateivse. Ph. Panicle somewhat contracted; glumes siiining; sheathslong, striate, smooth. 



iS'i/fton. Avena fiavescens. IVilld. Fu/go— Three awned Oat grass. 



Fl. Beginning of June. Fr. mat. Middle of July. 



Hab. Low meadow grounds; near Jos. Taylor's mill dam: rather scarce. About 2 feet high. 



Obs. Although I have followed Mr. Nuttall^in retainins: this genus, I cannot help feeling the force of Dr. 

 Smith's doubts on the subject. (See. Eel's' Cyclop, art. 'A'f*>sF.rvM.) The awns, so called, which termi- 

 nate the outer valve of the corolla, scarcely deserve tliat name: and the dorsal awn, in my specimens, 

 ai>pears to be slightly contorted. To say liie least, the generic character rests on a slender foundation. 



41, AIR A. Nutt. Gen. 90. 

 [An ancient Greek name; etymology obscure.} 



Cat., shining-. Cor. 2 valved, awnless, or awned from the base. 

 A- FALLENS. Muhl. Panicle contracted, slender, branches 4 or 5; leaves linear-lanceolate; ligula lacerate. 

 Synon. Avcaa palustris? Mr. Ph. Nutt. Sic. Fit^g-o— Hair-grass. 

 Fl. Last of May. Fr. mat. 



Ilab. Woodlands: Patton's woods: rare. A very slender grass, about 2 feet high. 



Obs. My specimens are entirely awnless; as remarked by Dr. Muhlenberg to be the case with thosw 

 which grow in woodlands. 



A. CESPiTOSA. Muhl. Panicle finally ditTuse, pyramidal; leaves setaceous, nerved, scabrous. 

 Fl. Latter end of May. Fr. mat. 



Hab. Sterile, moist places: Barrens, north of E- Worthington's: frequent. 2 to 3 feel high. 

 Obi. A fii-m, wiry grass, growing in a kind of tussock, or turf,— as the specific aame inn)ort». 



