Northeastern Asian Flora
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Rubus sumatranus Miq.  
Family: Rosaceae
[Rubus asper Wall. ex D.Don, moreRubus asper var. grandifoliolatus (H.L?veill?) Focke, Rubus asper var. myriadenus (H.L?. & Vaniot) Focke, Rubus asper var. pekanius Focke, Rubus dolichocephalus Hayata, Rubus indotibetanus Koidz., Rubus myriadenus H.L?. & Vaniot, Rubus myriadenus var. grandifoliolauts H.L?., Rubus rosifolius f. sorbifolius (Sims) Kuntze, Rubus rosifolius subsp. sumatranus (Miq.) Focke, Rubus rosifolius var. sorbifolius (Maxim.) Makino, Rubus somae Hayata, Rubus sorbifolius Maxim., Rubus sorbifolius var. myriadenus (H.L?. & Vaniot) T.B.Lee, Rubus sumatranus var. myriadenus (H.L?. & Vaniot) W.T.Lee, Rubus takasagoensis Koidz.]
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  • Japan Flora
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Japan Flora: Shrub with rather stout, flat prickles and long spreading glandular hairs, the branches stout, elongate, slightly prickly, glandular-pilose while young and sometimes also short-pubescent, the flower­ing branchlets elongate, 20-40 cm. long; leaflets (3-) 5-7, membranous, narrowly ovate to broadly lanceolate, 4-8 cm. long, 1.5-4 cm. wide, acuminate, rounded to obtuse at base, doubly or irregularly acute-toothed, ascending-pubeģ“:ent on upper side especially on the nerves, glandular-pilose and often slightly spreading-pubescent on nerves beneath, the petioles glandular-pubescent and sparingly prickly; inflorescence a terminal leafy corymbose soft-pubescent panicle with glandu­lar hairs; calyx 10-15 mm. long, the lobes lanceolate-deltoid, caudate, densely white-puberulent inside and on margin, reflexed in fruit; petals obovate or oblong, about 10 mm. long; fruit oblong, the fruitlets very many, glabrous; stones about 1.5 mm. long, pitted.  May-June.

Honshu (Tokaido and Kinki Distr.), Shikoku, Kyushu. s. Korea, China, Formosa, (India ?)

Rubus sumatranus
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Development supported by College of Agriculture and Life Sciences of Seoul
National University and Korea National Arboretum of Korea Forest Service.
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