20Q BRITISH BOTANY. 



/. C^Sii. — Stems and fruit more or less glaucous. 



28. R. csesius, L. Dewberry. — e.b. 826. l.c. (38). 



SteiQ round, barren stem angular rounded, glaucous, fur- 

 nished with prickles, glands, and hairs ; prickles variable, straight 

 or declining. Leaves ternate, those on the barren stem quinate 

 or ternate, with lateral external lobes on the lower pair ; leaflets 

 (lower pair) nearly sessile, overlapping, ovate-acuminate, deeply 

 and unequally toothed. Panicle nearly simple ; rach and pedicels 

 prickly, glandular and hairy. Sepals ovate-elongated, with short 

 points, embracing the fruit. Petals obovate. Fruit glaucous, 

 with more or less of a bluish tint. 



Hedges. Flower, June; fruit, August. 



R. tenuis (A. 10. C. 17. Lat. 51-55°.) — Stem weak, without 

 hairs and setse ? (Dr. Bell Salter.) 



29. R.Wahlbergii, Arrh. Wahlberg's Bramble.— A. S. C. 4. 

 Lat. 51-53°. 



Stem rounded angular, glaucous, downy, with numerous long, 

 nearly equal, straight or curved prickles, enlarged and hairy at 

 the base ; barren stem angular, furrowed with strong, decidedly 

 hooked, and declinate prickles. Leaves quinate, rather thick, 

 slightly hairy above, downy and whitish or grey below, with 

 prickly petioles ; leaflets roundish, abruptly pointed, cordate at 

 the base, unequally serrated, the lower pair (when the leaf is 

 quinate) deflexed, and not overlapping. Panicle branched and 

 leafy below, prickly, downy, and slightly glandular. Sepals 

 spreading. Fruit large, dark-purple. 



Hedges in the south of England. Shrub. August. 



Note. — The plants called R. Wahlbergii are now referred, in 

 the ' Manual,' to R. coryJifolius and R. nemorosus. 



Var. ctssius. — R. aquaticus, W. and N. Stems long and 

 slender, with very few and small prickles. Flowering branches 

 erect, slender, acicular and glandular, scarcely prickly. Flowers 

 few, on filiform, glandular pedicels. — This has disappeared in the 

 fourth edition of the ' Manual.' 



Note. — The Dewberry Brambles have a tendency to produce 

 numerous erect branches originating in the same joint; these 

 branches are often abortive, a tuft of scaly sheaths and leaves 

 only remaining to indicate the usual places of their growth. 



