This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Rubus odoratus L. Sp. Pl. 494. 1753.
Erect, branched, shrubby, glandular-pubescent and somewhat bristly, not prickly, 3°-5° high. Stipules small, lanceolate, acuminate; leaves simple, petioled, large (sometimes nearly 1° broad), 3-5-lobed, cordate at the base, pubescent, especially on the veins of the lower surfaces, the lobes acuminate, finely serrate, the middle one longer than the others; flowers terminal, rather numerous, corymbose or paniculate, purple (rarely white), showy, l'-2' broad; bracts membranous; calyx-lobes tipped with a long slender appendage; fruit red when ripe, depressed-hemispheric, scarcely edible.
Rubus columbiānus (Millsp.) Rydb., from West Virginia, appears to be a race of this species with narrower leaf-lobes.
Rubus parviflorus Nutt. Gen. 1: 308. 1818.
Rubus nutkanus Mocino; DC. Prodr. 2: 566. 1825.
Similar to the preceding species but usually less glandular and scarcely bristly. Leaves petioled, simple, cordate at the base, 3-5-lobed, the lobes acute or obtusish, rarely acuminate, the middle one equalling or but slightly longer than the others, all coarsely and unequally serrate; flowers few, corymbose, white, terminal, 1'-2' broad; calyx-lobes tipped with a long, slender appendage; fruit depressed-hemispheric, scarcely edible, red when ripe.
Rubus Chamaemorus L. Sp. Pl. 494. 1753.
Herbaceous, rootstock creeping, branches erect, 2-3-leaved, 3'-10' high, unarmed, finely pubescent or nearly glabrous, scaly below; stipules ovate, obtuse; leaves petioled, simple, orbicular or broader, 5-9-lobed, cordate or reniform at the base, pubescent or glabrous, 1'-3' broad, the lobes usually short, broad, dentate; flowers monoecious or dioecious, solitary, terminal, white, 6"-12" broad; sepals ovate, shorter than the petals, sometimes toothed toward the apex; fruit reddish to yellow, composed of few drupelets, edible and pleasant, at length separating from the receptacle.
In peat-bogs and on mountains, Maine and New Hampshire to arctic America, extending to Alaska and British Columbia. Also in northern Europe and Asia. An interesting southern colony of this plant has been recently found at Montauk Point, Long Island. Baked-apple berry. June-July.