44 



General distribution. — Common in high pine and blackjack lands of central penin- 

 sular Florida. 

 Specimens examined. — Florida: Bartow, Polk County, 1190 K. Combs, September, 

 1898; Clarcona, Orange Comity, 81 Marie Meislahn, October, 1899; Crystal, 

 Citrus County, 1015 R. Combs, September, 1898; Eustis, Lake County, 1736 G. 

 V. Nash, August, 1894; Fannin, Levy County, 869 R. Combs, September, 1898; 

 Old Town, Lafayette County, 898a R. Combs, September, 1898; Tampa, Hills- 

 boro County, 1386 R. Combs, October, .1898. 

 ARISTIDA INTERMEDIA S]x nov. (Fig. 18. ) 



A slender, sdmewhat geniculate, branching annual, 3 to 7 dm. high, with involute 

 leaves and long, sleiuler panicles. Culms smooth, freely branching, purplish, 



the outer branches genicu- 

 late, ascending; sheaths 

 usually shorter than the 

 internodes, smooth or the 

 lower sparsely hirsute, espe- 

 cially on the margins, and 

 purplish; ligule a very short 

 ring, 0.4 mm. long or less, 

 fringed wnth short hairs; 

 blades 5 to 15 cm. long, 2 

 mm. wide, erect, rigid, invo- 

 lute, sometimes sparsely 

 hirsute near the base. Pan- 

 icle 2 to 4 dm. long, slender, 

 often fiexuose; branches 

 short, 2 to 4 cm. long, 

 appressed. Spikelets 8 to 

 10 mm. long; empty glumes 

 narrowly lanceolate, atten- 

 uate into a rather long awn, 

 nearly equal or the upper 

 longer, 7 to 9 mm. long, 1- 

 nerved, scabrous, purplish; 

 flowering glume 7 to 9 

 mm. long, strongly scab- 

 rous above the middle, 

 equaUng or exceeding the 

 empty glumes, sometimes 

 regularly spotted as in A. 

 gracilis; awns all spreading, 

 the middle one 18 to 22 mm. 

 l(jng, the lateral ones 14 to 

 17 mm. long, all varia])le. 

 This species is most closely 

 allied to A. gracilis, but dif- 

 ers in its larger size and 

 especially in the much longer florets and awns. It is nearly intermediate between 

 .1. gntcHiK and .1. jjiirjjiiidxctuK. with the habit of the former and spikelets more 

 like those of the latter. 

 Type collected l>y T. II. Kearney, jr.. No. 204, near Biloxi, Mississippi, October 5, 



1896. 

 General distrikition. — Open, dry, sandy soil, Iowa to Texas and Mississippi. 



Fig. 1,h. — ^lii.'<ti(l(t iiilcnualid Scriljii. tt Ball: n. spikuk-t. 



