Montana Field Guide

Stems erect to arching, 1–3 m, armed with stout, curved, flattened prickles. Leaves with 3 to 5 narrowly ovate leaflets, 15–70 mm long, dentate to shallowly lobed, densely white-tomentose beneath, glabrous above. Flowers several in a prickly, hemispheric cyme; hypanthium tomentose, often glandular; sepals lanceolate, acuminate, 6–10 mm long; petals white, 4–8 mm long, shorter than the sepals. Fruit a purple, puberulent, hemispheric raspberry, 8–12 mm wide (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Open coniferous forest; valleys, montane (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

POLLINATORS
The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus vagans, Bombus auricomus, Bombus bifarius, Bombus borealis, Bombus centralis, Bombus melanopygus, Bombus mixtus, Bombus rufocinctus, Bombus ternarius, Bombus sitkensis, Bombus occidentalis, Bombus pensylvanicus, Bombus bimaculatus, Bombus griseocollis, Bombus impatiens, Bombus insularis, Bombus bohemicus, and Bombus flavidus (Heinrich 1976, Thorp et al. 1983, Mayer et al. 2000, Wilson et al. 2010, Colla and Dumesh 2010, Colla et al. 2011, Koch et al. 2012, Williams et al. 2014).