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..
Stems shrubby, biennial, branched, 3°-6° high, usually densely clothed with weak glandular bristles, or the older stems with small hooked prickles. Stipules narrow, deciduous; leaves petioled, pin-nately 3-5-foliolate, rarely simple and 3-lobed; leaflets ovate or ovate-oblong, acuminate, sharply and irregularly serrate or slightly lobed, rounded at the base, 1'-3' long, whitish-pubescent beneath; inflorescence terminal and axillary, racemose or paniculate, loose; pedicels slender, curving in fruit; flowers 4"-6" broad; petals white, ascending, about equalling the spreading acuminate, mostly hispid, velvety sepals; fruit elongated-hemispheric, light red, rarely white.
In dry or rocky situations. Newfoundland and Labrador to British Columbia, south in the Alleghanies to North Carolina, and in the Rocky Mountains to New Mexico. Ascends to 5500 ft. in North Carolina. The original of the Cuthbert and Hansall raspberries. Mulberry. May-July. Fruit ripe July-Sept.
Northern races closely resemble the Old World Rubus idaeus L.
Rubus neglectus Peck, Rep. Reg. Univ. N. Y. 22: 53.
1869. Rubus strigosus X occidentalis Aust. Bull. Torr. Club 1:
Intermediate between the preceding species and the next, probably originating as a hybrid between them. Stems usually elongated, recurved and rooting at the tip, glaucous, sparingly bristly and prickly; leaflets ovate, sharply and irregularly incised-serrate, very white-pubescent beneath, 1'-3'long; inflorescence corymbose, rather compact, terminal and often axillary; pedicels erect or ascending even in fruit; flowers 4"-5" broad; petals white, erect; fruit nearly hemispherical, dark-red or purple (yellowish in a cultivated form).
In dry or rocky soil, Vermont to Ontario, Pennsylvania and Ohio. The original of the Carolina, Gladstone and other raspberries. June-July. Fruit ripe July-Aug.
Rubus occidentalis L. Sp. Pl. 493. 1753. Rubus idaeus var. americanus Torr. Ann. Lyc. N. Y. 2: 196. 1825.
Very glaucous, stems cane-like, recurved, often rooting at the tip, sometimes 10°-12° long, sparingly armed with small hooked prickles, rarely slightly glandular-bristly above. Stipules setaceous, deciduous; leavespinnately 3-foliolate (rarely 5-folio-late); leaflets ovate, acuminate, coarsely incised-serrate, very white-pubescent beneath; flowers as in the preceding species; inflorescence corymbose, compact, usually only terminal; pedicels short, ascending or erect in fruit; fruit purple-black (rarely yellow), depressed-hemispheric.
New Brunswick to Quebec, Ontario, Georgia and Missouri. Ascends to 3000 ft. in Virginia. The original of the Gregg, Hilborn and other raspberries. May-June. Fruit ripe July. Called also scotch-cap and black-cap. Purple raspberry. Black-berry.
Rubus phoenicolasius Maxim., the wine-berry, of Japan, a densely glandular species, has locally escaped from cultivation.