98 PANICACE.E. 



2. A. villosa Beaiiv. Agrost. 48, t. 10,/. 7: 748 (1812). Aulaxan- 

 thus ciliatus Ell. 1. c. Panicum igtioratum Kunth, 1. c. A slender 

 tufted perennial with creeping rootstocks, smooth throughout, save 

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

 Leaf-blades flat, acuminate, the lower spreading, those on the 



middle of the culm 5-8 cm. long, 4-6 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 



Fig. 23.—Ani7i(pjian- glume (floral glume of the lower floret) thin, en- 

 tia villosa. Spike- ,. , • , n j?^-!^^ i 



let. (Scribuer.) closmg a stammate flower; lertile floret much 



like that of the former species. 



Florida, A. H. Cnrhss 3596, Garber 198, 247; North Carolina, 

 G. McCarthy; Louisiana, A. B. Langlois. 



Dry gravelly soil. Southern States. 



3. A. lanata (H. B. K.) Benth. Journ. Linn. Soc. 19 : 39 (1882). 

 Paspahim lanatum H. B. K., Nov. Gen. et Sp. 1: 94, t. 29 (1815). 

 Leptocorypliium lanatum Nees, Agrost. Bras. 2 : 84 (1829). 



A slender tufted perennial, smooth throughout, excepting the 

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

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

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

 cm. long. Spikelets pale green or straw-colored, linear-lanceolate, 

 3.5-4.5 mm. long, outer empty glumes ovate-lanceolate, 7-nerved, 

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

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

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

 a spikelet with 2 empty glumes, 1 floral glume, and 1 palea. 



South Mexico. Cuba, also in several parts of South America. 



24. (4). Amphicarpon Kaf. Am. Month. Mag. 2 : 175 (1818). 

 AtnpJiurnynm Kunth, Crram. 1 : 28 (1829). 



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 otlier kind 



