Rosa longicuspis

Rosa longicuspis Bertoloni

Languages: English

Overview

General Description

Shrubs usually evergreen, climbing or scrambling, 1.5-6 m tall. Branchlets purple-brown; prickles sparse or scattered, curved, to 5 mm, stout, flat, gradually tapering to a broad base. Leaves including petiole 7-14 cm; stipules mostly adnate to petiole, free parts lanceolate, often glandular-pubescent; rachis and petiole glabrous, with a few hooked prickles; leaflets 5-9, ovate, elliptic, or ovate-oblong, 3-7 (-11) cm long, 1-3.5 (-5) cm wide, leathery, both surfaces glabrous, abaxially with prominent midvein, adaxially shiny, rugose or not, base subrounded or broadly cuneate, margin acutely serrate, apex acuminate or long acuminate. Flowers numerous, in corymb, 3-4 (-5) cm in diameter; pedicel 1.5-3.5 cm, sparsely pubescent, densely glandular-pubescent; bracts ovate-oblong, margin glandular-pubescent. Hypanthium ovoid or obovoid, sparsely pubescent and glandular-pubescent. Sepals 5, deciduous, lanceolate, 0.8-1.2 cm, both surfaces pubescent, abaxially intermixed with glandular hairs, margin entire or few pinnately lobed, apex long acuminate. Petals 5, fragrant, white or creamy-white, broadly obovate, abaxially sericeous, base broadly cuneate, apex erose. Styles connate into column, exserted, slightly longer than stamens, pubescent. Hip dark red, obovoid, 1-1.2 cm in diameter, glabrous; sepals reflexed, deciduous at hip ripening.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Description

Diagnostic Description

Rosa longicuspis var. longicuspis is close relative of Rosa longicuspis var. sinowilsonii, but differs from the latter in its 7-9 (vs. 5 or 7) leaflets, not rugose (vs. slightly rugose) adaxially leaflets.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Morphology

Rosa longicuspis is here defined to included leaflets 7-9, leaves near corymb often with 5 leaflets, adaxially not rugose; flowers in corymbs.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Ecology and Distribution

Cyclicity

Flowering from May to July; fruiting from July to November.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Distribution

Rosa longicuspis is occurring in Guizhou Sichuan, Yunnan of China, N India.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Evolution

Wissemann (2003) provided a subgeneric classification of Rosa, in which Rosa longicuspis belong to subgenus Rosa, section Synstylae DC. Both cpDNA (atpB-rbcL) and nuclear DNA (ITS) sequences unify the Asian sections Indicae and Synstylae into a consectional group (Wissemann and Ritz, 2005). In the analysis of Japanese wild roses by Wu et al. (2000) matK-DNA again merged both sections together. Mikanagi et al. (1995) showed similar flower flavonoid composition for Synstylae and Indicae.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Habitat

Growing in mixed evergreen forests, thickets, scrub, dry open areas; 400-2700 m.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Taxonomy

  • Rosa charbonneaui H. Léveillé (synonym)
  • Rosa lucens Rolfe (synonym)
  • Rosa moschata Herrmann var. yunnanensis Crépin (synonym)
  • Rosa willmottiana H. Léveillé (synonym)
  • Rosa yunnanensis (Crépin) Boulenger (synonym)

References

Mikanagi, Y., Yokoi M., Ueda Y., & Saitom N. (1995).  Flower flavonol and anthocyanin distribution in subgenus Rosa. Biochemical Systematics and Ecology. 23,
Wissemann, V. (2003).  Conventional taxonomy of wild roses. Encyclopedia of rose science. London: Elsevier.
Wissemann, V., & Ritz C. M. (2005).  The genus Rosa (Rosoideae, Rosaceae) revisited: molecular analysis of nrITS-1 and atpB-rbcL intergenic spacer (IGS) versus conventional taxonomy. Botanical Journal of the Linnean Society. 147,
Wu, S., Ueda Y., He H. Y., Nishihara S., & Matsumoto S. (2000).  Phylogenetic analysis of Japanese Rosa species using matK sequences. Breeding Science. 50,