60 5. R. PLICATUS. 



i?. vulgaris Leigh t. ! Fl. Shrop. 321 (in part). 



R. suberectus Reichenb. ! Fl. exsic. No. 780 (sp.). Wirtg. 

 Fl. Preus. Rhein. 150. 



JR. suberectus jS. plicatus Borr. ! in Hook. ed. 2. 243 ; ed. 

 3. 246. 



B. corylifolius Scliultz Fl. Starg. 131 ; Suppl. 29. 



R. appendiculatus Trattin. Ros. iii. 31. DC. Prod. ii. 

 561 (teste Questier). 



R. fol. quinato-digitatis, &c. Linn. Fl. Suec. ed, 1. 148. 

 No. 409. 



R. hamulosus Miill. ! in Jahresb, Pollichia xvi. 76. 



Stem bluntly angular except at the tip, usually inclining 

 but not truly erect, bearing many subsessile glands, hairless, 

 more woody than R. suberectus or even R. Jissus. PricMes 

 tmequal declining or deflexed, conical, springing from an 

 oblong base, often falcate near the top of the stem. Lower 

 leaves ternate, upper quinate; or rarely pinnate-septenate. 

 Leaflets rather thin, serrate, very nearly glabrous above, 

 shining, pilose but not felted, pale yellowish green beneath, 

 more or less plicate; basal nearly sessile, imbricate, broadly 

 lanceolate ; intermediate shortly stalked, broadly lanceolate ; 

 terminal leaflet long-stalked, cordate-ovate prolonged (on the 

 septenate leaves it is narrowed to the base and very shortly 

 stalked, and its lateral leaflets are elliptic but unequal-sided) ; 

 midribs and slightly furrowed petioles with small hooked 

 prickles; stipules linear. 



Flov)ering shoot from brown rather silky scales, hairy. 

 Prickles strong, nearly straight, declining, or more often fal- 

 cate, from a very large long compressed base. Leaves ter- 

 nate ; lower leaflets ovate, broad and gibbous below, sessile; 

 petiole furrowed; uppermost floral leaves simple, cordate- 

 prolonged. Panicle or raceme leafy below, sometimes 

 throughout, with crisped hairs and many subsessile glands ; 

 nearly or quite without prickles in the typical plant, or 



