98 



PAXRACE.K. 



2. A. villosa Beauv. Agrost. 48. /. 10,/. 7: 748 (1S12). Aulaxan- 

 thus ciUattis Ell. 1. c. Pnnicnm if/Honthati Kimtli, 1. c. A slender 

 tufted perennial with creeping rootstocks, smooth throughout, save 

 the margins of the leaves and the spikelets, 30-120 em. high. 

 Leaf-blades Hat, acuminate, the lower spreading, those ou the 



middle of the culm 5-H cm. long, 4-0 mm. 



wide. Panicle exserted. slender, 10-18 cm. 



long. Spikelets elliptical or oval, 3-4 mm. 



long, pale green, hairs fewer than on the former 



species, usually appressed ; outer glume 3-5- 



nerved. with 4 vertical rows of hairs; third 



Fk;. 2i>. — Aiitft(rnan- glume (floral glume of the lower floret) thin, en- 

 tia villosa. Spike- , . . . -i i 



let. (Scribiier.) closing a stammate liower; fertile floret much 



like that of the former species. 



Florida, A. If. ( 'tniiss Dn'M. (iarbcr 198, 2i7; North Carolina, 

 (r. McCarfJii/; Louisiana. ^1. />'. Ldiiijlois. 



Dry gravelly soil. Southern States. 



3. A. lanata (H. H. K.) Henth. Journ. Linn. Soe. 19: 30 (1882). 

 Pasjuihini htiuitini} II. H. K., Nov. Gen. et Sp. 1: !»4. /. 2!» (1815). 

 Lppfororif/i/iium lanafiim Xees, Agrost. Bras. 2 : 84 (1 82ft). 



A slender tufted ]M'ivunial, smooth throiigliout, excepting the 

 margins and the throat of the sheaths and the spikelets. 30- 

 50 cm. high. Leaf-blades Hat or involute, acuminate. 3-4 mm. 

 wide. Panicle exserted, erect, rather densely many-flowered. 10-18 

 cm. Ion?. S]ukelets pale green or straw-colored, linear-lanceolate, 

 3.5-4.5 mm. long, outer om])ty glumes ovate-lanceolate. 7-nerved. 

 with 4 vertical rows of hairs, third glume ovate-lanceolate, thin aiul 

 slightly hairy at the apex, delicately 5-7-nerved. 4 mm. long : 

 palea much like the third glum?, delicately 4-nerved. Apparently 

 a s])ikelet with 2 emjity glumes. 1 floral glume, and 1 palea. 



South Mexico. Cuba, also in several )>arrs of South .America. 



24. (4). AmphiCARPON IJaf. Am. ^lonth. Mag. 2 : 175 (1818). 

 Amphirnrpnu) Kunth. Gram. 1 : 28 (1820). 



Spikelets 1-flowered. oblong or ovoid, articulate with the pedi- 

 cels, of two kinds, in narrow, erect, exserted interrupted panicles, 

 containing perfect flowers which seldom bear fruit ; the other kind 



