KI'Y TO BRITISH Rl'BI. 101* 



1. R, Idjctts L. — St. erect, nodding ft* the top, round, pruinose. 

 Prickles setaceous, straight. L. 5-pinnate or ternate, or rarely 

 7-pinnate. Term. It. long-stalked. Wood-borders and thickets. 



b. Leesii (Bab.). — L. ternate. Lts. nil roundly ovate, subsessile, 

 imbricate. Pan. 1. mostly simple, cordate, slightly 3-lobed, very 

 coarsely crenate- serrate. 



c. rotundifolius Bab. — "L. like those of var. b., but term. It. 

 long-stalked. L. of fl. -shoots similar, but upper ones simple/ 1 

 1 have not seen this var. 



Subsection II. Fruticosi. — Stems seldom snberect, often rooting 

 at end ; biennial or subperennial. Ripe fruit not separating from tie 



receptacle. L. never strictly pinnate ; but digitate, pedate, ternate, 

 or rarely septenate-pinnate. 



Group 1. Suberecti. — Stems usually suberect and (except in 

 nitidiis and affinis) very rarely rooting in autumn, glabrous or very 

 slightly hairy. No stalked glands. Prickles equal or very nearly 

 so. Sep. white felted within, externally greenish, with white 

 margin. 



A. Prickles subulate or conical. L. frequently 7-nate. Spe. 

 patent. Fr. dark red. 



2. E. fissus Lindl. — St. bluntly angular above, round below, 

 bright red in exposure, usually short. Prickles many, not confined 

 to angles, all subulate, with very small slightly dilated base. L. 

 rather thick and plicate (except in deep shade), much divided, often 

 with broadly triangular-pointed term. It. Bas. Its. sessile. Pan. 

 very small. Stam. about equalling styles. St. (when its suberect 

 habit is not taken into account) somewhat resembling that of R. 

 ctesius. Thickets, especially in the North and in hilly districts. 



3. R. suberectus Anders.— St. often acutely angled and sulcate 

 above, tall. Prickles few (or none), confined to the angles, shorter 

 than in K.Jissus, conical, with rather long compressed base. L. 

 plane, thin, large, often 7-nate. Term. It. cordate -ovate, gradually 

 acuminate. Bas. Its. subsessile. Pan. and fl. variable in size. 

 Stam. exceeding styles. Damp thickets. 



B. Prickles compressed, usually with large dilated compressed 

 base. L. very rarely 7-nate (except in ammobitu and affinis). Sep. 

 patent or reflexed. Fr. black. 



a. Sep. patent in fruit (usually). 



(1) Stam. Jailing short of styles. 



4. R. plicatus W. & N. — Prickles strongly falcate or deflexed, 

 with large bases. Adult 1. plicate, with coarse double and some- 

 times lobate-serrate teeth, green and hairy on both sides. Term. It. 

 broadly ovate-cordate, and more or less acuminate. Bas. Its. sub- 

 sessile in mummer (except in wet places). Stipules linear. Pan. 

 typically racemose, nearly unarmed, or with prickles like those on 

 the stem. Pet. usually large, obovate. Stem, nearly equalling 

 styles. Sep. unarmed, dark green externally, with long points. 

 Very variable. 



