This section is from the book "British Wild Flowers - In Their Natural Haunts Vol5-6", by A. R. Horwood. Also available from Amazon: A British Wild Flowers In Their Natural Haunts.
The habitat of this species is hilly woods. The stem is green, with short prickles. The leaves are 3-5-lobed. The leaflets are unequal, irregularly toothed, the terminal one with a long narrow point. The panicle is narrow, forming a raceme, with racemose branches below. The stamens hardly exceed the style. The young carpels are smooth. The plant is in flower in June and July, and is a deciduous shrub.
Rubus hirtus, Waldst. & Kit. - The habitat of this species is hilly woods. The habit is prostrate from a low base, rarely climbing, the stem densely covered with stalked glands, glandular bristles, and acicles. The prickles are straight, bristlelike. The leaves are principally 3-5-lobed, rarely 4-5-lobed. The leaflets are broad, coarsely toothed, very hairy on the veins below. The rachis is violet or red-brown, with stalked glands, and many long, glandular bristles. The stamens exceed the style. The carpels are hairy. The plant is densely glandular and bristly.
The habitat of this species is woods and thickets. The prickles are rather stout, strongly bent down or hooked. The leaves are 3-5-lobed, the leaflets are opaque above, thinly hairy beneath, with fine lobed teeth, shining, the terminal one with a long narrow point. The panicle is very loose, and most of the flower-stalks are aggregated into a corymb, the ultra-axillary top forming a corymb. The stamens are much longer than the styles. The young carpels are hairy. The plant is intermediate between R. viridis and R. Lintoni.
Rubus tereticaulis, P. J. Muell. - The habitat of this species is woods and heathland. The stem is densely hairy, with crowded, spreading hairs and acicles. The prickles are slender. The terminal leaflet is inversely egg-shaped, rather narrow, with a long narrow point. The rachis is rather wavy, and the flower-stalk spreading, densely felted and hairy, with crowded, unequal, sunken, black, stalked glands, the longer stalked glands and gland-tipped bristles few or none. The stamens are nearly equal to the style. The carpels are smooth. This species is intermediate between R. foliosus and R. hirtus, var. rotundifolius, differing in being more hairy than either and much smaller.
The habitat of this plant is woods and rough open ground. The stem is stout, rich yellow-brown, or dark-brown in exposed places. The plant is very prickly and nearly smooth. The prickles are crowded, short, passing into minute tubercles. The leaves are chiefly 3-lobed. The leaflets are nearly equal, the terminal one roundish, inversely egg-shaped, with a short narrow point. The panicle is long. The flower-stalk is strongly ascending. The sepals are turned back in flower and fruit. The stamens are longer than the style. This plant recalls R. mu-cronatus in the leaves and panicle, differing in armature and stem. It is intermediate between it and R. foliosus.
The habitat of this plant is woods. The stem bears scattered silky hairs (hence the name velatus). The prickles have a stout base. The leaves are 3-5-lobed, with 3 lobes radiating from a common centre, and 2 lateral. The leaflets have short, shining hairs below, and fairly even, scalloped, toothed margin. The terminal leaflet is roundish, inversely egg-shaped, with an enlarged lower side. The panicle is long and cylindrical. The calyx is less deeply cleft than usual, with greenish, narrow sepals clasping the fruit. The stamens exceed the style. The carpels are downy. The plant is intermediate between the Bellardiani and Caesii, distinguished by the long sepals completely embracing the small fruit.
Rubus corylifolius, Gm. (sp. coll.). - The habitat of this plant is thickets, hedges, and commons. The habit is arching, prostrate. The stem is roundish, with few or no stalked glands and acicles. The prickles are awl-like, nearly equal, irregularly scattered. The leaflets are fairly thick, with felt below, the terminal one with a fairly long stalk. The panicle is rather irregular, with few axillary branches, and white felted rachis. The flower-stalk and sepals are also felted. The ordinary stalked glands and acicles are few or absent. The fruiting sepals are turned back in fruit, egg-shaped, with a long narrow point, erect or turned back. The petals are round to egg-shaped. The plant flowers in June till August. It is a shrub.