Appearance
''Rosa acicularis'' is a deciduous shrub growing 1–3 m tall. The leaves are pinnate, 7–14 cm long, with three to seven leaflets. The leaflets are ovate, with serrate margins. The flowers are pink , 3.5–5 cm diameter; the hips are red, pear-shaped to ovoid, 10–15 mm diameter.The ploidy of this rose species is variable. Botanical authorities have listed it as tetraploid and hexaploid in North America , and octoploid in Eurasia . On the northern Great Plains and
in northwest Canada, extending to Whitehorse, Yukon its populations are generally tetraploid.
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