9 1 Flora of the Palouse Region 



R. lacustre Poir. Stout, 1-2 in. high, armed with short 3-5-lobed spines 

 and very numerous bristly prickles: leaves orbicular, cordate, deeply 5-lobed, 

 incisely dentate, minutely glandular, 2-4 cm. long: racemes loose, drooping: 

 flowers greenish or purplish, slender-petioled: calyx short, saucer-shaped, 

 the obtuse lobes spreading: stamens very short: berries nearly black, bristly- 

 glandular. Moist woods, Thatuna Hills. 



R. niveum Lindl. Erect shrubs, 1-3 m. high, armed with stout solitary 

 or triple dark spines but not prickly: leaves orbicular, truncate or cuneate 

 at base, the lobes bluntly 3-5-toothed, minutely ciliate, otherwise glabrous, 

 1-2 cm. long; petioles slender, longer than the leaves: racemes spreading, 

 as long as or longer than the leaves, the 3-5 flowers mostly nodding: calyx- 

 tube narrow, shorter than the linear white lobes: stamens much exserted; 

 filaments hairy: berries smooth, black, as large as a pea. Along 

 Snake River, 



R. COgnatum Greene. Erect shrubs, 1-2 m. high, armed with pale triple 

 spines, sometimes very prickly as well: leaves and young shoots densel}' 

 puberulent, sometimes glandular: leaves orbicular, truncate or cordate at 

 base, 3-5-lobed, incisely dentate, 2-3 cm. broad; petioles hairy, as long as or 

 shorter than the blades: racemes 2-3-flowered, drooping; bracts glandular; 

 pedicels very short: calyx-tube cylindrical, whitish, pubescent, 5-6 mm. 

 long, larger than the oblong spreading lobes. Along Snake River and 

 and Union Flat Creek. 



R. saxosum Hook. Low spreading shrubs, about 1 m. high, unarmed or 

 with feeble simple spines and a few prickles: young shoots glabrous, the 

 leaves somewhat puberulent or glabrous: leaves orbicular, cordate, 5-lobed: 

 coarsely-toothed, 1-3 cm. long and broad: racemes drooping, 2-3-flowered, 

 calyx-tube bell-shaped, green, about3 mm. long, as long as the obtuse green- 

 ish or purplish reflexed lobes: stamens exserted, as long as the lobes; fila- 

 ments nearly glabrous: berries small, black. Pullman, along streams. Our 

 form is not typical. 



R. aureum Lindl. Unarmed, 1-2 m. high, usually glabrous throughout: 

 leaves thick, somewhat orbicular, cuneate or rounded or truncate at base, 

 deeply 3-lobed, the lobes coarsely 3-5-toothed or entire, 2-3 cm. broad; 

 petioles slender, about as long as the blades: flowers bright yellow, in dense 

 ascending or spreading racemes: calyx-tube slender, cylindrical, about 10 

 mm. long, the obtuse lobes spreading: petals short, oblong, frequently dark- 

 red: stamens short: berries black, red or golden. Snake River canyon; also 

 on Union Flat. 



R. cereum Dougl. About 1 111. high, with numerous short branches, the 

 young commonly resinous-dotted and glutinous: shoots and under sides of 

 the leaves puberulent: leaves orbicular, somewhat 3-5-lobed, crenate-dentate, 

 rounded or subcordate at base, about 1 cm. long; petioles mostly shorter 

 than the leaves: pedicels very short; racemes short, dense, 3-5-flowered, 

 drooping: calyx white, cylindric, 6-8 mm. long, glandular, the short lobes 

 obtuse: petals orbicular: berry orange-red, insipid. Common on the bluffs 

 of Snake River, otherwise rare. 



R. viscosissimum Pursh. Unarmed, about 1 m. high, pubescent through- 

 Out and somewhat glandular: leaves cordate-orbicular, obtusely 5-lobed, 

 somewhat doubly dentate, soft-pubescent, especially beneath, 2-5 cm. broad; 

 petioles about as long as the blades, hirsute-glandular: raceme ascending, 



