Two New Species of Aristolochia (Aristolochiaceae) from Hainan Island, China

• Han Xu ^[1] ; Yi-De Li ^[1] ; Hai-Jun Yang ^[2] ; Huan-Qiang Chen ^[3]
  1. [1] Chinese Academy of Forestry

     Chinese Academy of Forestry

     China

     
  2. [2] South China Agricultural University

     South China Agricultural University

     China

     
  3. [3] Jianfengling National Nature Reserve

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• Localización: Novon: a journal for botanical nomenclature, ISSN 1055-3177, Vol. 21, Nº. 2, 2011, págs. 285-289
• Idioma: inglés
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• Resumen

  • Two new species of Aristolochia (Aristolochiaceae), A. ledongensis Han Xu, Y. D. Li & H. J. Yang and A. jianfenglingensis Han Xu, Y. D. Li & H. Q. Chen, are described and illustrated from Hainan Island, China. Aristolochia ledongensis differs from the similar A. championii Merr. & Chun and A. bambusifolia C. F. Liang ex H. Q. Wen by having the exterior of the calyx yellow (vs. yellowish green), a smaller basal portion of the calyx tube (15�16 × 4.5�5 mm vs. 30�70 × 7�10 mm), a narrower calyx limb (0.5�0.7 cm vs. 1.5�6 cm wide), and a shorter peduncle (0.7�1 cm vs. 1.8�5 cm). Aristolochia jianfenglingensis differs from the similar A. championii and A. bambusifolia by having the stems glabrous (vs. densely villous), the exterior of the calyx light red-brown (vs. yellowish green), a smaller basal portion of the calyx tube (23�26 × 5�6 mm vs. 30�70 × 7�10 mm), and a narrower calyx limb (0.8�0.9 cm vs. 1.5�6 cm wide). Aristolochia championii and A. bambusifolia have densely villous stems; the exterior of the calyx is yellowish green, with a larger basal portion of the calyx tube (> 30 × ca. 10 mm); the calyx limb is discoid and more than 15 mm wide; and the peduncle is longer than 18 mm. Both new taxa are assessed as Vulnerable (VU D2) according to IUCN Red List criteria.