Rosa woodsii, (Woods Rose)

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Intermountain Flora
Strongly armed to nearly unarmed shrub1-3 (4) m tall, usually with well devleoped, straight or less often somewhat curved infrastipular prickles, and often with other stout or weak prickles as well; leaves variously puberulent or glandular beneath to glabrous; leaflets 5-9, mostly 2-5 cm long and 1-2.5 cm wide, occasionally some of them smaller (only about 1 cm long in a few plants from Nev.), elliptic to ovate or obovate, singly serrate, the teeth not gland-tipped; flowers mostly in small corymbiform cymes terminating the lateral branches of the season, relatively small; hypanthium glabrous, 3-5 mm thick at anthesis; pedicels glabrous; sepels 1-2 cm long, 2-3.5 mm wide at the base, only seldom with any lateral lobes, the tip usually a little expanded above the median constriction, the back glabrous to puberulent or occasionally inconspicuously glandular, rarely coarsely stipitate-glandular, the sepals persistant, erect or nearly so in fruit; petals light pink to deep rose, 1.5-2.5 cm long; hip red to more often purple or nearly black, globose to ellipsoid or pyriform, 0.6-1.2 (1.5) cm thick; achenes more or less numerous, 3-4 mm long, stiffly long-hairy along one side; 2n = 14.

Cronquist, A., Holmgren, N.H., and Holmgren, P.K. (1997) "Intermountain Flora" pg. 136, vol. 3 part A, The New York Botanical Garden New York.