Shrubs, 2–10(–15) dm, armed. Stems ?biennial?, erect to arching, rarely creeping, ?not node-or tip-rooting?, sparsely to moderately hairy, sparsely to densely long-, rarely short-stipitate-glandular, ?glands rounded to flattened?, not pruinose; prickles absent or sparsely to moderately dense, erect to retrorse, weak, slender, 1–3(–5) mm, narrow-based; ?bristles sparse to dense, erect to retrorse, green to reddish, narrow, semirigid, sometimes flexible, not gland-tipped?. Leaves deciduous, ternate or palmately compound, ?sometimes ± lustrous?; stipules filiform to lanceolate, 5–20(–38) mm; leaflets (3–)5, terminal obovate or elliptic to rhombic, 4.5–11.5 × 2–7 cm, base cuneate to narrowly rounded, unlobed, margins moderately, coarsely serrate to doubly serrate or serrate-dentate, apex acute or acuminate to short-attenuate, abaxial surfaces unarmed or with bristles on midvein, sparsely to moderately hairy, eglandular or sparsely to moderately sessile-to long-stipitate-glandular along larger veins. Inflorescences terminal ?on short shoots, sometimes appearing axillary?, 5–15(–20)-flowered, racemiform, cymiform, or thyrsiform. Pedicels prickles or bristles sparse to dense, erect to retrorse, moderately to densely hairy, moderately to densely stipitate-glandular. Flowers bisexual; petals white, obovate to oblanceolate, 6–13 mm; filaments filiform; ovaries glabrous. Fruits black, globose, 0.7–1.5 cm; drupelets 5–25, strongly coherent, separating with torus attached. 2n = 14, 21, 28, 35.
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Primocanes erect, ascending, or arched, rising to about 1 m or less, not rooting, beset with stiff bristles or slender, often soft prickles, the latter straight or nearly so, spreading or somewhat reflexed, mostly slender to the base, often glandular when young; primocane lvs 3-or 5-foliolate; petiole commonly as bristly as the stem; lfls usually glabrous or nearly so, but sometimes evidently hairy beneath, even velvety; infl few-to many-fld, racemiform or corymbiform, or sometimes reduced and leafy; pedicels usually glandular; fr of mediocre quality. Typically in moist or wet, low ground, but also in old fields and other disturbed habitats; Que. to Wis., s. to Va. and Ill. June–Aug. (R. angustifoliatus; R. ascendens; R. beatus; R. benneri; R. clausenii; R. discretus; R. dissensus; R. elegantulus; R. groutianus; R. hispidoides; R. jejunus; R. lawrencei; R. mediocris; R. nocivus; R. racemiger; R. regionalis; R. rotundior; R. schneideri; R. semisetosus; R. uniformis; R. univocus; R. vermontanus; R. wheeleri)
A shrub. It grows 20-100 cm tall.
Open woodlands, savannahs, prairies, meadows, disturbed areas, dry to wet soil; at elevations up to 1,000 metres.
Can be grown by cuttings or seedlings. Seeds needs stratification.
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