Comprehensive Description
provided by North American Flora
Rosa williamsii Fernald, Rhodora 20: 95. 1918
Stem 3-5 dm. high, unarmed or sparsely setose below, purplish; branchlets unarmed,
glabrous; stipules dilated, adnate, 1-2 cm. long, glandular-pulverulent beneath, conspicuously
glandular-cilia te, the free portion semi-ovate; petiole and rachis glandular-pulverulent and
glaudular-setulose; leaflets 5-7, mostly 7, cuneate-obovate, chiefly rounded or subtruncate at
summit, coarsely and simply or doubly serrate above the middle, short-pilose on both
surfaces, glandular on the nerves beneath, 1-3.5 cm. long; flowers solitary or paired; pedicels
1-1.5 cm. long, glabrous; hypanthium glabrous, ovoid, in anthesis 3.5-4.5 mm. thick, in fruit
becoming pyriform, with attenuate base, succulent, 1.1-1.3 cm. long, 7-8 mm. thick; sepals
lance-ovate, glabrous or pilose on the back, more or less glandular-ciliate, after anthesis tightly
reflexed and persistent, the blade 5-7 mm. long, the foliaceous glandular-ciliate appendage
4-8 mm. long; petals roseate, 1.7-2 cm. long; styles distinct, persistent, not exserted; achenes
borne in at the bottom and on the sides of the hypanthium.
Type locality: Bic, Quebec.
Distribution: Known only from the type region.
- bibliographic citation
- Per Axel Rydberg. 1918. ROSACEAE (conclusio). North American flora. vol 22(6). New York Botanical Garden, New York, NY
Comprehensive Description
provided by North American Flora
Rosa blanda Ait. Hort. Kew. 2: 202. 1789
Rosa Solaniri Tratt. Ros. Monog. 2: 150. 1823.
Rosa blanda pubescens Crepin, Bull. Soc. Bot. Belg. IS: 33. 1876.
Rosa gratiosa Lunell, Am. Midi. Nat. 2: 154. 1912.
Stem 1-2 m. high, unarmed or when young with scattered bristles, brown, but without bloom; branchlets unarmed; stipules dilated, adnate, 1-2 cm. long, finely pubescent, glandulardentate, rarely glandular, the free portion ovate; petiole and rachis finely pubescent; leaflets 5 or 7, rarely 9, oval or obovate, coarsely toothed, dull and glabrous above, paler and finely pubescent, usually densely so, beneath, 2-6 cm. long; flowers solitary or in few-flowered corymbs; pedicels 1-3 cm. long, glabrous; hypanthium glabrous, subglobose, without a neck, rounded at the base, in fruit about 12 mm. broad; sepals lanceolate, caudate-acuminate, glandular on their back, tomentose within, about 15 mm. long, after anthesis erect and persistent; styles distinct, persistent, not exserted; achenes inserted in the bottom and on the lower portion of the sides of the hypanthium.
Type locality: Hudson Bay.
Distribution: Anticosti to Connecticut, Pennsylvania, Missouri, North Dakota and Manitoba.
- bibliographic citation
- Per Axel Rydberg. 1918. ROSACEAE (conclusio). North American flora. vol 22(6). New York Botanical Garden, New York, NY
Comprehensive Description
provided by North American Flora
Rosa subblanda Rydberg
Rosa blanda Jacq. Fragm. pi. 107. 1809. Not R. blanda Ait. 1789.
Rosa fraxinifolia Lindl. Ros. Monog. 26, in part. 1820. Not R. fraxinifolia Borkh. 1790.
Rosa'blanda glabra Crepin, Bull. Soc. Bot. Belg. 15: 33. 1876.
Stem 1-2 m. high, unarmed or the young shoots sparingly bristly, purple, often with a bloom; branches usually wholly unarmed; stipules adnate, more or less dilated, glabrous, 1-2 cm. long, glandular-dentate but otherwise rarely glandular, the free portion usually ovate; petiole and rachis glabrous or with some scattered hairs, sometimes a little glandular; leaflets 7 or 9, oval or obovate, mostly acute at both ends, glabrous on both sides, dull green above, pale beneath, sharply serrate with lanceolate ascending teeth, 1.5-5 cm. long; flowers solitary or in few-flowered corymbs; pedicels 1-3 cm. long, glabrous; hypanthium subglobose, glabrous, in fruit 10-12 mm. broad; sepals lanceolate, caudate-acuminate, somewhat glandular on the back, tomentose within, about 1.5 cm. long, after anthesis erect, persistent; petals obcordate, 2.5-3 cm. long; styles distinct, persistent, non-exserted.
Type locality: North America.
Distribution: New Hampshire to Michigan; Manitoba; perhaps also Iowa.
- bibliographic citation
- Per Axel Rydberg. 1918. ROSACEAE (conclusio). North American flora. vol 22(6). New York Botanical Garden, New York, NY
Comprehensive Description
provided by North American Flora
Rosa dasistema Raf. Ann. Gen. Sci. Phys. 5: 219. 1820
Stem terete, armed with small curved prickles 3-5 mm. long; branches spreading; stipules narrow, 1 cm. long or less, glabrous or slightly pubescent, the free portion short, lanceolate or subulate, spreading; petioles and rachis sparingly hairy, sparingly prickly, sparingly pubescent; leaflets 5, rarely 7, elliptic, glabrous on both sides or somewhat pubescent on the veins beneath, 2-4 cm. long, finely crenate-serrate, obtuse or acute at each end; flowers solitary or two together; pedicels short, usually about '1 cm. long, glandular-hispid; hypanthium more or less pyriform or ellipsoid, acute at the base, glandular-hispid, about 8 mm. thick in fruit; sepals linear-lanceolate, caudate-acuminate, 12-15 mm. long, glandular-hispid without, tomentose within, after anthesis spreading and soon deciduous; petals 1.5-2 cm. long; styles numerous, not exserted, distinct; achenes inserted in the bottom of the hypanthium.
Type locality: Ohio and Indiana.
Distribution: Swamps of West Virginia, Ohio, Indiana, and Missouri.
- bibliographic citation
- Per Axel Rydberg. 1918. ROSACEAE (conclusio). North American flora. vol 22(6). New York Botanical Garden, New York, NY
Comprehensive Description
provided by North American Flora
Rosa gemella Wilid. Enum. 544. 1809
Rosa cinnamomea gemella Seringe, in DC. Prodr. 2: 605. 1825.
Stem low, 3-10 dm. high, often reddish, terete, rarely bristly, armed with short curved prickles 4—5 mm. long; stipules narrow, or the upper dilated, about 1.5 cm. long, adnate, glabrous or nearly so, often glandular-dentate; petiole and rachis glabrous, sometimes glandular-hispid; free portion of the petiole 3-8 mm. long; leaflets 5-7, elliptic, oval, or obovate, 1.5-3 cm. long, acute at the base, usually obtuse or rounded at the apex, finely serrate, glabrous on both sides or slightly pubescent on the veins beneath; flowers 1-4, corymbose; pedicels 1-3 cm. long, glandular-hispid; hypanthium globose, glandular-hispid, in fruit 10-12 cm. broad; sepals lanceolate, caudate-acuminate, glandular-hispid on the back, tomentose within, entire or with a few subulate lobes, reflexed after anthesis and soon deciduous; petals obcordate, about 2 cm. long; styles distinct, persistent, not exserted; achenes in the bottom of the hypanthium.
Type locality: North America.
Distribution: Massachusetts to southern New York.
- bibliographic citation
- Per Axel Rydberg. 1918. ROSACEAE (conclusio). North American flora. vol 22(6). New York Botanical Garden, New York, NY
Rosa blanda
provided by wikipedia EN
Rosa blanda, commonly known as the smooth rose,[1][2] meadow/wild rose, or prairie rose, is a species of rose native to North America. Among roses, it is closest to come to a "thornless" rose, with just a few thorns at the base. The meadow rose occurs as a colony-forming shrub growing to 1 m (3.3 ft) high, naturally in prairies and meadows. The roses are quite variable, the characteristics such as leaf tip number of prickles and glandular hairs usually do not always remain constant, thus it is often confused with Rosa arkansana or Rosa carolina, the two other prairie rose species.
Description
Flowers of Rosa blanda are perfect, having both stamens and carpels, and they vary from white to pink in color. The species name comes from the Latin word blandus, meaning "flattering, caressing, alluring, tempting", referring to the beauty of the flowers.[3] Blooming in early summer, the flowers are borne singly or in corymbs from lateral buds. The central flower opens first, containing no bract and a pedicel 2–4 cm (0.79–1.57 in) long (shorter and stouter than those of other prairie rose species). The five large petals are shaped either obovate or obcordate, 3 cm (1.2 in) long and 2.5 cm (0.98 in) wide. The petals are colored white to pink with streaks of red, the anthers yellow, the stigma yellow/orange, and the filaments white. The stamens and style become erect once the petals fall.
Distribution
Rosa blanda grows naturally in meadows, prairies and fields occurs on dry hillsides, roadsides, fence rows, in either sandy or rocky soil. The range of natural growth is from Quebec to Ontario, south to Kansas, and east to Missouri and Ohio.[4]
Habitat and ecology
Rosa blanda is a perennial rose that is fairly sturdy and can tolerate dry, nutrient poor habitats such as roadsides, and sandy soil. This species is the native flower of regions in Kansas and North Dakota; however, it can be very similar to the Rosa multiflora, an invasive species introduced from Japan. These two species can successfully coincide with one another providing uses for the environment and animals.[5]
Hybridization with the Japanese rose (Rosa rugosa) has been recorded in eastern North America. This is a cause for concern over the potential for development of vigorous hybrids with invasive potential and genetic assimilation of the native species.[6]
References
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Rosa blanda: Brief Summary
provided by wikipedia EN
Rosa blanda, commonly known as the smooth rose, meadow/wild rose, or prairie rose, is a species of rose native to North America. Among roses, it is closest to come to a "thornless" rose, with just a few thorns at the base. The meadow rose occurs as a colony-forming shrub growing to 1 m (3.3 ft) high, naturally in prairies and meadows. The roses are quite variable, the characteristics such as leaf tip number of prickles and glandular hairs usually do not always remain constant, thus it is often confused with Rosa arkansana or Rosa carolina, the two other prairie rose species.
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