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'Karafuto-Ibara' rose References
Website/Catalog  (2006)  
 
Karafuto-Ibara (Sakhalin Briar) R. davurica Pall. var. alpestris (Nakai) Kitag. (syn. =R. marretti H. Lév.)
Neo-Lin. Fl. Manshur.:382 (1979)
Distribution: Hokkaido, Central Honshu

R. davurica var. alpestris is found in grassland and on forest margins in Hokkaido, and in some limited areas of central Honshu: Gunma and Nagano Prefectures. The flowers of this rose closely resembles that of R. rugosa, though it is a little smaller (3 to 4 cm across). Two, three, or more flowers are borne at the terminal of a small cane. The tree grows pretty tall, some reaching 2 metres or more. Its distinctive features are purplish coloured stems and reddish bracts at the base of a peduncle. It gives globular or ovoid fruits ca. 12 mm across. Its flowering period in C-Honshu is the beginning of July. Its fragrance is spicy, too, but less sweet than that of R. rugosa.
Article (magazine)  (2001)  Page(s) 393.  
 
R. marretii Lév. Ploidy 2x
Pollen fertility 96.9%
Selfed Fruit set 0%
Book  (1988)  Page(s) 159.  
 
location 146/1, R. marrettii Lévl., CINNAMOMEAE, Sachalin, 1908, pink, single, small, bushy, upright, to 2.5 m, many bristles, few prickles, orange-red small-medium glossy urn-shaped to rounded fruit, upright long sepals
Book  (1981)  
 
R. marrettii Lév. Upright shrub, 1.5-2 m./5-6.6 ft. high, branches purple, with few slender, upright curved mostly paired prickles; leaflets 7-9, oblong, 2-3 cm./0.8-1.2 in. long, rather bald, simply serrate; flowers few together, pink, 4-5 cm./1.6-2 in. across, June; sepals dilated at the top, puberulent beneath, longer than the petals, persisting pedicels bald; fruits globose, 12 mm./0.5 in. thick, red. 2n =14. (= R. rubrostipulata Nakai). Saghalin. 1908
Book  (1976)  Page(s) 178.  
 
Botanical roses on the territory of the USSR, whose independence requires precising...
R. marretii Lévl. - according to Tolmatschew very similar to R. amblyotis C. A. Mey., no reason to classify as an independent species; according to Juseptschuk differs by its high fertility from R. amblyotis; a critical investigation is required; the existence of transitional forms does not justify the classification as an independent species. According to Woroschilow R. amblyotis C. A. Mey.
Book  (1971)  Page(s) 342-343.  
 
R.marretii Levi, in Fedde, Repert. Nov. Spec. VIII (l910) 281. Shrub; leaflets 3—4 pairs, elongate, ca. 3 cm long, 1 cm wide, narrowly lanceolate, sparingly pubescent beneath. Fruit globose, very large. In all other parts similar to preceding species. Fruit ripens in October.
Forest edges. — Far East: Sakh. Endemic. Described from vicinity of Korsakov. Type in Paris.
Note. A problematic form requiring study; distinguished from the typical R.amblyotis C.A, M. chiefly by its large fruit, N. E. Kabanov, who observed R.marretii in Sakhalin and obtained a fruiting specimen for our herbarium, considered it distinct from the typical R. amblyotis, also growing in Sakhalin.
Book  (1937)  Page(s) 74.  
 
Marrettii Lév. (cinnan.-Asiatic) [ploidy] 14
Book  (1936)  Page(s) 459.  
 
R. marretti (cinnamomea) Lévêque 1910; bluish pink, 4 cm, single, solitary or up to 3, dark red buds, light green foliage, short branches, bushy dense habit, climbing, 2m. Park rose. From Sachalin. Sangerhausen
International Organization For Plant Information lists Rosa davurica var. alpestris (Nakai) Kitag. as the accepted name of this rose, which is a varietas of Rosa davurica. Rosa marretti H. Lév. is a synonym.
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