42. R. TUBERCULATUS. 281 



but sometimes acute, upper broad roundly oval cuspidate; 

 terminal roundly or rather quadrangularly cordate, subcus- 

 pidate; basal of the quinate leaves obovate, usually blunt, 

 subsessile or shortly stalked overlapping the unequal-sided 

 obovate cuspidate intermediate leaflets; petioles (which are 

 furrowed above) and midribs with declining prickles beneath ; 

 stipules narrowly lanceolate or rarely linear. 



Fluwerhui' shoot from ashy scales, slightly angular, 

 covered with a thin coat of fascicled crisped hairs many 

 short setre and aciculi. Prickles unequal, slender, declining, 

 from a long compressed base. Leaves ternate. Leaflets 

 serrate, doubly or lobate-serrate towards the tip, y^^l^^^e 

 above, hairy on the veins beneath, green on both sides ; 

 basal bilobed, sessile ; terminal obovate, narrowed to a 

 slightly truncate base. Panicle rather short, leafy; axillary 

 branches racemose, few-flowered, ascending ; ultra-axillary 

 top corymbose ; rachis and peduncles finely felted, hairy, 

 with long unequal setae and aciculi, and long slender de- 

 clining prickles which are longest at the top of thy panicle 

 and of the peduncles where they are abundant. Sepals 

 ovate-acuminate, long-pointed, felted, with many hairs setce 

 and aciculi, clasping the fruit. Petals roundly obovate, jagged 

 at the end, pinkish. Stamens and styles greenish-yellows 

 Nut obovate-oblong, the point of attachment and style 

 lateral. 



"We are indebted to Mr Leighton for pointing out the 

 existence and characteristics of this plant, of which he kindly 

 supplied me with an abundance of specimens, and also with 

 valuable remarks concerning it. It cannot be the R. nemo- 

 rosus yferox of Arrhenius, nor the similarly named variety 

 of R. dumetorum of "Weihe, nor the latter botanist's R. ferox ; 

 for that plant has not the tuberculai'-based prickles which 

 are characteristic of R. titberculatus and is much more 

 prickly on the flowering shoot; in the words of Weihe and 



24—3 



