Hybrid Rose

Rosa palustriformis Rydberg, sp. nov
A shrub, 5 dm. high or more, with the habit of R. palustris; stem armed with curved prickles 5-10 mm. long and more or less flattened; stipules 2.5-3.5 cm. long, puberulent, more or less dentate, those of the upper leaves broad, the free portion lanceolate; petiole and rachis puberulent and sometimes with a few small prickles; leaflets lanceolate or oblanceolate, acute at each end, 3-5 cm. long, finely serrate, dark-green and glabrous above, finely puberulent and paler beneath; flowers corymbose; bracts conspicuous; hypanthium round-ellipsoid, in fruit about 12 mm. broad and 15 mm. long, glabrous; sepals 2.5-3 cm. long, caudate-attenuate, tomentose within, puberulent without, with a few glands on the margins, in fruit erect and persistent; petals obcordate, about 2 cm. long; styles distinct, scarcely exserted; achenes inserted on the sides as well as in the bottom of the hypanthium.
Type collected at Green Bay. Wisconsin, June, 1895, Schuette (in flower); also August, 1899 (in fruit, both in Gray Herb.). Distributed under a manuscript name, which however is preoccupied.