Trees; a handbook of forest-botany for the woodlands and the laboratory . Fig. 38. Raspberry, Rubus Idceus, p. 107 (D). Rubus fruticosus, L. Blackberry (Fig. 39). Ascrambling shrub, usually with arched angular shoots,bearing recurved prickles, and often rooting at the large and coarse, sub-evergreen, pinnately 3—5- BLACKBERRY 169 fbliolate, the terminal leaflet usually on a longer petiolulethan the others, which may be sub-sessile and overlap atthe edges: often 5-foliolate on the barren shoots and3-foliolate on those bearing flowers, but occasionally alltrifoliolate, or the uppermo
Trees; a handbook of forest-botany for the woodlands and the laboratory . Fig. 38. Raspberry, Rubus Idceus, p. 107 (D). Rubus fruticosus, L. Blackberry (Fig. 39). Ascrambling shrub, usually with arched angular shoots,bearing recurved prickles, and often rooting at the large and coarse, sub-evergreen, pinnately 3—5- BLACKBERRY 169 fbliolate, the terminal leaflet usually on a longer petiolulethan the others, which may be sub-sessile and overlap atthe edges: often 5-foliolate on the barren shoots and3-foliolate on those bearing flowers, but occasionally alltrifoliolate, or the uppermost may be merely Fig. 39. Blackberry, Rubus fruticosus, p. 168 (D). Leaflets obovate to rhomboid-ovate, or ovate, veryvariable in size; coarsely serrate or irregularly toothed ;convex and dark green above, and usually glabrous; palergreen or glaucous, to velvety and even tomentose whiteor glandular hairy beneath ; or both sides maybe given,or hairy. Venation pinnate and prominent below, and 170 BLACKBERRY: DOG ROSE bearing prickles, as also do the petioles ; stipules subulateand attached some way up the petiole. Venation pinnate,as in R. Ccesius, p. 160. Autumn leaves usually greenwith purple blotches. [The species is extremely variable, and forms numeroushybrids. As many as 45 varieties have been described forthe British Flora. Of these the glaucous and trifoliolatesub-species R. Ccesius, L. (sp.), the Dewberry, has perhapsthe best claims to be ranked separately (see p. 160), butseveral of the other forms are well marked by charactersderived from the number of the leaflets, the glandular,hairy or gla
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