500 Mackenzie : 0n05M0dium 



This species was founded by Michaux on a plant collected 

 near Nashville^ Tennessee, and the above description is largely 

 based on fruiting specimens gathered near the same place by the 

 collectors for the Biltmore Herbarium, and on flowering speci- 

 mens collected by Dr. Gattingen The western species to which 

 this name has been applied by the later botanists differs from this 

 one in the larger, less pitted, and never constricted nutlets ; in the 

 corolla, which is larger and much more pubescent externally; in the 

 longer strongly- nerved sepals; and in being a much rougher plant. 



Onosviodhun hispidissvnum^ with its hispid stem and noticeably 

 constricted nutlets, is easily distinguished. 



As far as known Onosmodiinn niolle is confined to the barrens 

 of Tennessee and Kentucky, and is a comparatively rare plant in 

 collections, 



* 



Specimens examined. Kentucky : C. IV, S/toi^-ty 1840. 



Teisinessee : GjM[f i^ez^^y ^ Cedar Barrens of Middle Tennessee ; 

 Bilt more Herharium SJo^ l 7 August 1895, Nashville. 



L 



4. Onosmodium hispidissimum nom. nov. 



Onosmoduon carolinianiun of American authors ; not Onosniodutni 



carolinia)ium A. DC. Prodr, 10 : 70, 1846 ; nor Onosmodiinn 



niolle Michx. Fl. Bor. Am. i; 13. 1803 ; nor Litliosperumni 



carolinianiun Lam. Tabl. Encyc. i: 367. 1 791. 



An erect perennial, often 9-12 dm. high, strongly branching 

 above, the branches spreading or ascending ; stem and branches 

 thickly covered with spreading hispid whitish (or in the inflores- 

 cence yellowish-white) hairs 2-4 mm. long, the branches and often 

 the stem also appressed-pubescent : leaves typically lanceolate, 8 

 cm. long and 14 mm. wide, sometimes 2.5 cm. wide and i dm. 

 long, acute or acutish, tapering to the sessile base, prominently 

 5-7-nerved on both surfaces, strongly covered with whitish or 

 sometimes yellowish-white spreading papillose hispid hairs above 

 and on the veins beneath, and appressed-strigose between the 

 veins beneath: bracts 8-16 mm, long, resembhng the leaves in 

 outline : fruiting pedicels from very short to 4 mm. long : calyx- 

 lobes linear-oblong, obtuse or obtusish, 4-6 mm. long, strongly 

 hispid with yellowish-white hairs: corolla (in earlier flowers, at 

 least) 14-18 mm. long, twice the length of the flowering calyx, 

 sparingly canescent outside below the lobes, but usually strongly 

 canescent and with strongly developed tufts of hairs at the tip of 

 the broadly triangular-acute lobes, which are about 3 mm. long : 



