348 PROCEEDINGS OP THE AMERICAN ACADEMY 



ing characters of the species. In the later Flora of the State he considers this 

 species and R. humilis identical. The range will probably prove to be somewhat 

 more extended, but all herbarium specimens which I have seen from more 

 western localities that have been referred to this species are clearly referable to 

 li. hiiiiiilis. The fruit is sometimes found oblong-obovate, but in all tiie cases 

 that I have examined this has been a deformity caused by insects, and attended 

 by a diminished number of seeds. Dr. Turrey in the Flora of Ntw Yorh 

 attributes a like variation in R. Carolina to the same cause. 



13. R. nuMiLis, Marsh. Stems usually low (1 to 3 feet) and 

 more slender, less leafy, with straight slender spines, spreading or 

 sometimes reflexed : stipules narrow, rarely somewhat dilated ; leaflets 

 as in the last, but usually thinner and paler, glabrous or usually more 

 or less pubescent, especially beneath, and also the rhachis (often 

 prickly) : flowers very often solitary, the outer sepals always more or 

 less lobed, often piunately so : fruit as in the preceding. — Arbust. 

 Amer. 136. H. parvijlora, Ehrh. Beitr. 4. 21. R. Lyonii^ Pursh, 

 Fl. 345. R. lucida, Auct. ; Meehan, Native Flowers, 2. 33, t. 9. 



Haij. In dry soil and on rocky slopes and mountain sides ; from Maine to 

 Georgia and west to Wisconsin, Missouri, the Indian Territory, and Louisiana. 

 — Maine (Oakes) ; Massachusetts [Oakes, Jesitp, Watson) ; Connecticut {Bishop) ; 

 New York (Eaton, Nuttall, Egjert, Jesup) ; New Jersey (Read, Torreij) ; Pennsyl- 

 vania (Lea, Read, Whitesides, Redjield, [Voile, Engelmann) ; Maryland (/. D. Smith) ; 

 District of Columbia (Vasey, Ward); Virginia (Ctirtiss, Shriver) ; N. Carolina, 

 on Roan Mountain (Gray); Georgia (Mrs. Say, G. R. Vasey); Ohio (Baldwin, 

 Morgan, H. P. Smith) ; Indiana ( Coulter) ; Michigan (Drake, Clarke, Gillman, 

 Wheeler); Ontario, Detroit River (Gillman) ; Wisconsin, Dane County (Hale); 

 Illinois (Short, Engelmann, Vasey, Brendel) ; Missouri, St. Louis and Jefferson 

 Counties (Engelmann, Eggert) ; Kentucky (Riddell, Short); Tennessee (Gattin- 

 ger) ; Alabama (Buckley, Kirk, Mohr) ; Mississippi (Hilgard) ; Louisiana (Hale, 

 Carpenter) ; Arkansas (Nuttall, Fendler) ; Indian Territory, at Limestone Gap 

 (B Idler). 



A widely distributed and very variable species, but in general readily distin- 

 guished. The spines are usually very slender, but on more vigorous plants they 

 may become stouter and somewliat flattened, but are always straight. In a few 

 specimens the feaflets have been found doubly toothed. 



14. R. NiTiDA, Willd. Usually low, nearly or quite glabrous 

 throughout, the straight slender spines often scarcely stouter than the 

 prickles which cover the stem and branches more or less thickly : 

 stipules usually dilated ; leaflets bright green and shining, usually nar- 

 rowly oblong and acute at each end, sometimes broader and obtuse, 

 small (the terminal ^ to 1} inches long): flowers usually solitary 

 (rarely 2 or 3), bright red (1} to 2^ inches broad), the slender pedi- 

 cel, receptacle, and calyx densely hispid or glandular-prickly ; sepals 

 entire: fruit globose, 4 or 5 lines broad. — Euum. 544; Liudl. Ros. 

 Monogr 13, t. 2. R. rubrispina, Bosc. 



