490 ROSACEAE (ROSE FAMILY) 



prickles ; leaflets subglabrous above, velvety beneath ; racemes cylindrical, 

 somewhat elongated, provided for more than half their length with nearly uni- 

 form unifoliolate ovate-oblong petiolate very persistent bracts; pedicels scarcely 

 or not at all glandular; flowers 2.5-3 cm. broad; petals broadly obovate ; 

 fruit subglobose, falling before the bracts; drupelets rather few. (R. villosus, 

 var. Torr. ; E. philadelphicus Blanchard.) Dry rocky hillsides, e. Mass, to D. C. 



15. R. pergratus Blanchard. Erect, 1-2 m. high ; old canes strongly fur- 

 rowed, purplish, with stout broad-based straightish subremote prickles ; leaflets 

 sparingly villous (at length for the most part glabrate) above, velvety beneath ; 

 racemes short-cylindric ; rhachis and pedicels villous, essentially glandless ; 

 flowers 2.5-3.5 cm. broad; petals broadly obovate; fruit short-cylindric, with 

 numerous juicy drupelets. (It. orarius and R. amnicolus Blanchard.) Open 

 ground, N. B. to Vt. and Mass., common. 



16. R. sativus (Bailey) Brainerd. Erect or nearly so, 3-7 dm. high ; canes 

 rather weak, greenish, unarmed or with few small prickles; leaves even on the 

 first year's shoots chiefly 3-foliolate ; leaflets short, broadly ovate, glabrous or 

 nearly so above, velvety beneath, with deltoid teeth; inflorescence a few-flowered 

 small corymb, leafy at base ; flowers 1.5-2 cm. broad ; petals narrowly obovate ; 

 fruit subglobose, of few large juicy drupelets. (It. villosus, var. Bailey ? R. 

 nigrobaccus, var. Bailey '?) Alluvial soil, w. Vt. (Brainerd, Eggleston), and 

 presumably westw. 



R. ARGtrxus Link, of this group, an American species, described from 

 specimens cultivated in Berlin, has been variously interpreted, but cannot now 

 be certainly identified from the flowering material preserved. 



17. R. reciirvans Blanchard. Erect or recurving, often rooting at the tip; 

 canes firm, obtusely 5-angled, often much elongated (2-4 m. long), purplish, 

 remotely armed along the angles with strong straightish prickles; leaflets 

 smoothish above, velvety beneath, sharply and irregularly toothed; racemes 

 short, leafy toward the base, corymbiform; flowers 2-2.5 cm. broad; petals 

 obovate ; fruit short-cylindric, with rather numerous large juicy drupelets. 

 (R. arundelanus Blanchard.) Open soil, in thickets, etc., N. E., common. 



18. R. elegdntulus Blanchard. Erect, 6-12 dm. high ; canes slender, glabrous, 

 armed chiefly on the angles with slender straightish prickles; leaflets of the 

 mature 8-foliolate leaves small, glabrous on both surfaces, rather firm, sharply 

 toothed; inflorescence of slender sometimes compound leafy-bracted racemes; 

 pedicels filiform, sometimes bearing scattered setae, obscurely tomentulose ; 

 flowers 2.5-3 cm. broad ; petals oblong-spatulate ; fruit globose, with few large 

 drupelets. Uplands,- s. w. N. H. and s. e. Vt. 



19. R. peculiaris Blanchard. Erect or slightly recurving ; old canes purple, 

 5-angled, armed on the faces as well as the angles with numerous setiform 

 prickles ; leaflets of the mature 3-foliolate leaves large, glabrous on both surfaces, 

 rather coarsely serrate-dentate; inflorescence a short raceme, leafy-bracted at 

 base ; flowers 2.8-3 cm. broad ; petals oblong-obovate ; fruit subglobose, of few 

 rather large drupelets. Dry ground, York Co., Me. 



20. R. Randii (Bailey) Rydb. Slender weakly armed reddish or greenish 

 canes sub erect or recurved, sometimes elongated and rooting at the tip, subterete ; 

 leaflets thin, glabrous on both surfaces, sharply and' irregularly toothed; inflo- 

 rescence a few-flowered corymbiform raceme, leafy-bracted at base ; pedicels 

 filiform, nearly unarmed, often glabrate, flexuous ; flowers 2-3 cm. broad; 

 petals narrowly obovate ; fruit subglobose, of few drupelets. (R. argutus, var. 

 Bailey; R. recurvicaulis Blanchard.) River banks, alluvial soil, etc., Nfd. 

 to Vt. and Ct. 



21. R. canadSnsis L. Erect or recurving, often stout; old canes glabrous, 

 unarmed or with rare prickles ; leaflets glabrous on both surfaces, finely, evenly, 

 and sharply toothed, those of the b-foliolate leaves caudate-acuminate ; racemes 

 cylindric, rather long, leafy-bracted at base ; pedicels filiform, tomentulose, 

 not glandular; flowers 2.5-4 cm. broad; petals obovate; fruit subglobose to 

 short-cylindric, of large and juicy but somewhat acid drupelets. (R. amabilis 

 Blanchard.) Rocky soil, in thickets, etc., Nfd. to L. Superior, s. chiefly in 

 the uplands to N. C. 



