96 Rhodora [May 
C. TT (when present) bristleform and not much thickened at 
ase D. 
D. Leaves of the new canes with oblong to ovate acuminate 
leaflets; of the fruiting canes with 3 (rarely 5) similar but 
shorter leaflets. 
Now danes bristles icici os. ooo cba var. strigosus. 
New canes without bristles. . var. strigosus, forma tonsus. 
D. Leaves of the new canes with 3 short ovate to suborbicular 
round-tipped or blunt leaflets; of the fruiting canes 
simple and rounded or at most 3-lobed. . var. Egglestonii. 
B, Bark of the new canes cinereous-tomentulose beneath the prickles. 
Many of the prickles stout and broad-based..... var. heterolasius. 
Friki ad Destiefoim. .. |... . 6. 605% (ences wns: var. canadensis. 
R. barus L. Sp. Pl. i. 492 (1753). R. idaeus vulgatus Arrhen. 
Monog. Rub. Suec. 12 (1840). Batidaea strigosa, subsp. B. itascica 
Greene, Leaflets, i. 239 (1906).— Indigenous on the Magdalen Islands 
(forma INERMIS Kaufmann in Flora Exsiccata Bavarica, no. 25), and 
in Minnesota and North and South Dakota, presumably elsewhere; 
also generally introduced and escaping from cultivation. In various 
regions of Quebec and northern Maine strongly approached by clearly 
indigenous forms of var. strigosus and canadensis. 
Var. ACULEATISSIMUS Regel & Tiling, Fl. Ajan. 87 (1858). R. 
idaeus, subsp. melanolasius Focke, Abh. Nat. Ver. Bremen, xiii. 473 
(1896). R. melanolasius Focke, l. c. (1896); Rydberg, N. A. Fl. xxii. 
448 (1913). Batidaea strigosa, subsp. B. cataphracta Greene, Leaflets, 
i. 241 (1906).— Eastern Asia and western North America, extending 
east to Micuican: Vermillion, Chippewa Co., C. K. Dodge, no. 64. 
Var. srRIGOSUS (Michx.) Maxim. Bull. Acad. St. Pétersb. xvii. 161 
(1872). R. strigosus Michx. Fl. Bor. — Am. i. 297 (1803). R. pensil- 
vanicus Poir. in Lam. Encyc. vi. 246 (1804). Batidaea strigosa 
(Michx.) Greene, Leaflets, i. 238 (1906). B. strigosa, subsp. B. 
heterodoxa Greene, |. c. 239 (1906), fide Rydberg. B. strigosa, subsp. 
B. elegantula Greene, |. c. 239 (1906), fide Rydberg. R. idaeus, var. 
aculeatissimus, Robinson & Fernald in Gray, Man. ed. 7, 486 (1908) 
in part, not Regel & Tiling, Fl. Ajan. 87 (1858). R. Matsumuranus 
Léveillé & Vaniot, Bull. Acad. Geogr. Bot. xx. 135 (1909). R. idaeus, 
subsp. strigosus (Michx.) Focke, Spec. Rub. pt. 2, 209 (1911). R. 
strigosus, var. borealis, Spach ex Focke,l. c. (1911).— Southern New- 
foundland and Gaspé Co., Quebec, to southern British Columbia, 
south to Virginia, the Great Lake States, and Wyoming; also eastern 
Asia. 
Var. STRIGOSUS, forma albus (Fuller), n. comb. R. strigosus, var. 
albus Fuller ex Bailey, Cyc. Am. Hort. 1582 (1902). R. idaeus, var. 
aculeatissimus, forma albus (Fuller) Fernald, Rnopona, x. 50 (1908). 
Fruit amber-white.— Rare; seen only from New HaMrsHIRE: rocky 
pasture, Cobb's Hill, Alstead, August 5, 1900, Fernald. 
Var. STRIGOSUS, forma tonsus, n. f., turionibus laevibus, aciculis 
nullis. 
