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Swamp rose flowers arise from the upper stems as single flowers or corymbs of 2-4 flowers. The flowers are 1.5-3" across, with five green, lance-shaped sepals, five pale- or rosy-pink, oval or heart-shaped petals, a ring of about two hundred yellow stamens, and a flat central disc of 24-50 styles that is pink or orange-red (much less often, yellow). The sepals and pedicels are covered with glandular hairs. The fruits are typical rose hips but are quite small (3/8" across, pea-sized), bright red when ripe.

Rosa

Rosa palustris

swamp rose [Blooms: May-Jun]

Rugosa rose flowers are 2-3" across; they have five sepals covered with glandular hairs, five magenta (more rarely pink or white), wrinkled petals, over 100 yellow stamens, and a yellow, flat stylar disc in the center of the flower. The fruits are typical rose hips about 1" across, bright red when ripe. Rugosa rose prefers sandy habitats and sites prone to water stress (e.g., roadsides where salt washes off the roads). The wrinkled leaves and magenta petals, profuse straight thorns/prickles, and large rose hips are distinguishing characters of rugosa rose.

Rosa

Rosa rugosa

rugosa rose [Blooms: May-Jul]