title: Carex jianfengensis (Carex sect. Rhomboidales, Cyperaceae), a New Species from Hainan, China.
abstract: A new species of Carex sect. Rhomboidales, C. jianfengensis, is described and illustrated from Hainan, China. The new species is similar to C. zunyiensis but differs in having involucral bracts sparsely hispid and with ca.1 cm long sheaths; inflorescence with 4 spikes, terminal spike ca. 2.5 cm long, lateral spikes 2-3.5 × 0.7-1 cm; staminate glumes narrowly ovate, ca. 5 mm; pistillate glumes triangular-lanceolate, 5-7 mm; perigynia 6-8 × 3 mm and pubescent on veins; nutlet 4-5 mm long, rhombic-ovoid, trigonous, base with shortly stipitate, apex abruptly contracted into a erect short beak, and not expanding into an annulate orifice.
authors.affiliation: Tropical Crops Genetic Resources Institute, Chinese Academy of Tropic Agricultural Sciences, Danzhou, Hainan, People's Republic of China.
authors.forename: Hubiao
authors.initials: H
authors.lastname: Yang
authors.affiliation: Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan, People's Republic of China.
authors.forename: Xiaoxia
authors.initials: X
authors.lastname: Li
authors.affiliation: Tropical Crops Genetic Resources Institute, Chinese Academy of Tropic Agricultural Sciences, Danzhou, Hainan, People's Republic of China.
authors.forename: Wenqiang
authors.initials: W
authors.lastname: Wang
authors.affiliation: Tropical Crops Genetic Resources Institute, Chinese Academy of Tropic Agricultural Sciences, Danzhou, Hainan, People's Republic of China.
authors.forename: Changjun
authors.initials: C
authors.lastname: Bai
authors.affiliation: Tropical Crops Genetic Resources Institute, Chinese Academy of Tropic Agricultural Sciences, Danzhou, Hainan, People's Republic of China.
authors.forename: Guodao
authors.initials: G
authors.lastname: Liu
mesh_terms: D031255:Carex Plant / Q000145:classification*; D002681:China