TRIANDRiA. DIGYNIA. 15 



50. ELYMUS. Nutt. Gen. 118. 

 [An ancient Greek name, of obscure derivation.] 



Cal. lateral, 2 valved,9etiform; in pairs, like a 4 leafed involucre. Cor. 2 valved; outer valve awned. 



E. viRGiNicus. Muhl. Spike erect; spikelets 3 flowered, awned, by pairs; calyx as long as the spikelets, 

 Fl. Middle of July. Fr. mat. Beginning of Septen-.ber. 



Hub. Moist situations; Forks of Brandywine: frequent. 3 to 4 feet high. 



Ohs. The spikes of this grass resemble heads of Barlpy, at a little distance. Tlie spikelets, in iny speci- 

 mens, are hispid, and not glabrous, as described in EU. Ph. &c. In all other respects, it agrees perfectly. 



E. HYSTRix. Muhl. Spikelets in pairs, divergent, glabrous, 3 flowered; involucre 0, or 2 leaved; awns long. 

 Fl. Beginning of July. Fr. mat. Last of August. 



Hab. Rich, moist woodlands: Bath; Dungeon bottom: frequent. 2 to 4 feet high. 

 Obs. The bristly spike of this remarkable species somewhat resembles an Apothecary's bottle-washer. 



S. PoLYGAjrous. a. Calyx 1 flowered. 



51. ANDROPCGON. JVutt. Gen. 88. 



[Gr. literally Man's beard; from a fancied resemblance in the hairs of the involucres.] 



Flowers in pairs: /nj)o/i(cr-f, a fasciculate villus. Male, orNEUT. awnlcss, pedicellate. 

 Hermaph. sessile. Cul. 2 valved, awnless. Cor. 2 or 3 valved; awned at base, or at summit. 



§1. Panicle terminal. 



A. avenacetts. Bart- JFl. Phil. Glabrous; panicle pyramidal-oblong; corolla ciliate; awn contorted 

 Synon. A. ciliatus. Ell. A. nutans. 3Iuhl. ru/g-o— Wood-grass. Indian-grass. 

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



Hab. Old, neglected fields: Barrens &c. common. 3 to 5 feet high. 



§2. Spikes conjugate, or fasciculate. 



A. scoPARius. Ell. Leaves and sheaths pilose; spikes simple, pedunculate, by pairs, lateral and terminal" 

 Synon. A. purjjurascens. Muhl. and IVilld. I w/g-o— Purple Wood-grass. 

 Fl. Latter en.l of August. Fr. mat. Beginning of October. 



Hab- Sterile, sandy grounds: old fields &c. common. About 3 feet high. 



A. MACROURUs. Muhl. Monandrous; spikes terminal, fastigiate: stem leaves crowded, subulate. 



Synon. Cinna glomerata. Walter. Fm/^o— Cluster flowered Wood-grass. 



FL Beginning of September. Fr. mat. Beginning of October. 



Ha,h. Sterile, wet meadows: Barrens; near the Paoli: not very common. 2 to 3 feet high. 



A. FURCATUs. Ell. Spikesdigitate, generally by fours; leaves lanceolate; sheaths glabrous- 

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



Hab. Barren ridge: near the Bath, &c. frequent. About 3 feet high. 



Obs. We have, perhaps, some other species which I have not been able clearly to ascertain. Thpy are all 

 known by the common n^smes of fFoorf-grass, and i«dt«?i-g-rasi; and are, by their presence, indicative of 

 either a sterile soil, or bad farming— or both. 



b. Calyx 2 flowered, t Flowers mostly scattered. 



52. HOLCUS. Nutt. Gen. 93. 

 [An ancient Greek name: Etymology obscure.] 



Flowers paniculate: Male, pedicellate. Cal. 2 valved. Cor. 0, or 2 valved. 



Hermaph. sessile. Cal. 2 valved. Cor. smaller, 2 valved; outer valve awned below the ape v. 



H. LANATUS. Bart. Fl. Phil. Panicle contracted; glumes ciliate; leaves lanceolate, soft, woolly. 



FuZjo— Feather-Grass. White Timothy. Salem-Grass. 



Fl. Middle of June. Fr. mat. Latter end of July 



Hab. Meadows, woodlands, and low grounds: frequent. 12 to 18 inches high. 



Obs. The plant has a hoary appearance: the panicle often purple. It is believed to be a foreigner; an^ 

 although Dr. JNIuhlenbers speaks of it as beins good fodder, it is not highly esteemed, here. 



