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 bushy places. The habit is nearly prostrate. The stem is stout and very hairy, dull purplish-brown. The prickles are very unequal, from a long, broad base. The leaves are moderate. The leaflets are thick, roundish, egg-shaped, with a fine point, with fine-pointed, compound, not deeply cut teeth, soft beneath, with grey-green felt and short hair. The armature is very strong. The petals are bright-red, the sepals in fruit erect or widespreading. The plant is dark and shaggy, and intermediate between R. pyramidalis and R. Marshalli or R. hystrix.
Rubus Koehleri, Wh. & N. - The habitat of this species is woods, thickets, bushy places, and hedges. The habit is arching, prostrate. The stem has crowded, unequal, scattered prickles, acicles, bristles, and stalked glands, even, the longest bristles and acicles not unfrequently tipped with glands. The leaflets have uneven, rather coarse compound teeth, even above, hairy on the veins below, the basal leaflets not overlapping-. The panicle is open, narrowed to the blunt top, rather loose. The rachis and flower-stalk have very crowded, widespreading, long, slender prickles, acicles, bristles, and stalked glands. The fruiting sepals are turned back. It flowers in July and August, and is a deciduous shrub.
The habitat of this species is woods, bushy places, hedges, especially in hilly districts. It differs from R. Koehleri in the densely hairy stem, with fewer intermediate prickles. The leaflets are thick, leathery, very softly hairy, and usually much paler beneath, the principal teeth, which are compound, being wide-spreading or bent back. The panicle is long, very narrow, and interrupted. The petals are pink. The sepals are turned back in fruit.
The habitat of this Rubus is woods. It has armature of the sub-Koehlerian group, nearer to R. mulabilis than R. Koehleri. The long leaflets are narrowed both ends, with a narrow, long point, and very pale beneath. The branches of the panicle bear many flowers, and the sepals are loosely turned back. The panicle is large, the fruit small.
Rubus Marshalli, Focke & Rogers. - The habitat of this species is bushy places and heaths. The plant is hairy. The stem is densely clothed with stout-based pricklets and unequal acicles and stalked glands. The armature is dense, unequal, and widespreading. The leaves are small, 3-5-lobed, with 3 lobes radiating from a common centre, 2 lateral. The leaflets have thick, soft hair below. The panicle is very elongate, ultra-axillary, narrowed almost to a point at the top, with long lower branches, like secondary panicles. The sepals are somewhat widespreading when the fruit is young. The plant is intermediate between R. Koehleri and R. fuscoaier.
Rubus viridis, Kalt - The habitat of this species is woods and bushy places. The habit is prostrate. The stem is armed with numerous, unequal, acicular bristles, stalked glands, and slender, bent-down, large-based prickles and pricklets. The leaflets are softly hairy, and nearly smooth beneath, usually thin and brittle, with irregular, shallow teeth. The panicle has spreading, few-flowered, long-stalked branches, forming a raceme above. The stamens exceed the styles. The young carpels are downy. This species differs from R. pallidus in the more unequal armature, less compound panicle, and broader leaflets with less conspicuous, long points.
Rubus durotrigum, R. P. Murray. - The habitat of this species is woods and bushy ground. The habit is prostrate or climbing. The stem is clothed with dense prickles, acicles, and bristles. The prickles are very crowded, slender, with a long base. The leaves are large. The leaflets are very broad, shining, slightly hairy on the veins beneath, the terminal leaflet roundish, egg-shaped, with a long, gradually-narrowed point, with deeply-cut or lobed teeth. The panicle is pyramidal. The stamens and style are nearly equal. The young carpels are thinly hairy.
Rubus divexiramus, P. J. Muell. - The habitat of this species is woods and heaths. The stem is slender, round, bluish-green, dark-purple. The leaves are mostly 3-lobed, with lateral leaflets deeply lobed or enlarged. The leaflets are yellowish-green, with fine, close, compound teeth, with short hair below, the terminal one obtuse-angled, inversely egg-shaped. The panicle is rather broad, rounded, with ultra-axillary top. The stamens are longer than the style. The young carpels are rather downy. The plant resembles R. viridis, R. longithyrsiger, and R. infecundus. The chief characters are the terminal leaflet, dark purple stem and rachis, rather broad, rounded panicle, and erect, fruiting sepals.
Rubus Bellardi,Wh. & N. - This species is found chiefly in moist woods. The habit is arching prostrate. The stem is round, with acicular prickles conical from a large base. The leaves are 3-lobed. The leaflets are nearly equal, rather evenly and finely toothed, the terminal one oval, the lateral ones very similar, with very short, spreading stalk. The panicle is short, forming a raceme above, with long, thin flower-stalk with crowded, unequal, red-stalked glands and acicles. The stamens and style are nearly equal. The sepals embrace the young fruit. The young carpels are smooth. The plant flowers in July and August, and is a deciduous shrub.