显脉瘤蕨
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2023-11-09 06:58
Phymatosorus membranifolius (R. Br.) S. G. Lu in Guihaia 19 (1): 27. 1999. ——Polypodium membranifolium R. Br., Prodr. 147. 1810. ——Microsorummem branifolium (R. Br.) Ching in Bull. Fan Mem. Inst. Biol. 10: 239. 1941; S. B.Andrews, Ferns of Queensland 280. F. 28. 5. D. 1990; Noot. In Blumea 42: 339. 1997; Hovenk. in Fl. Mal. 3: 114. 1998. ——Polypodium nigrescens Blume, Enum. Pl. Jav. 126. 1828; Fl. Jav. Fil. 161. t. 70. 1829; Christ in Bull. Boiss. 6: 201. 1898. ——Phymatodes nigrescens (Blume) J. Sm., Ferns Br. For. 94. 1866; Tardieu et C. Chr. in Fl. Indo-Chine 7 (2): 473. 1941: Holttum, Ferns of Mal. 1: 193. 1954; Rev. Fl. Mal. 2: 193. f. 95. 1955. ——Pleopeltis nigrescens (Blume) Carr. in Seem., Fl. Vit. 368. 1873; Bedd., Handb. 367. f. 208. 1883. ——Microsorum nigrescens (Blume) Copel., Occ. Pap. B. P. Bishop Mus. 14: 74. 1938; Tagawa et K. Iwat., Fl. Thailand 3 (4): 532. 1989. ——Phymatosorus nigrescens (Blume) Pic. Serm. in Webbia 28 (2): 459. 1973; Jarrett et al., Ind. Fil. Suppl. 5: 135. ——Phymatodes variabilis Ching in Contr. Inst. Bot. Nat. Acad. Peiping 2 (3): 64. pl. 3. 1933; Ching et al. in W. Y. Chun, Fl. Hainan. 1: 175. 1964. ——Phymatodes nigrescens var. variabilis (Ching) C. Chr. et Tardieu. in Fl. Indo-Chine 7 (2): 473. 1941. ——Phymatosorus variabilis (Ching) Pic. Serm. in Webbia 28 (2): 460. 1973; Jarrett et al., Ind. Fil. Suppl. 5: 135. 1985. ——Pleopeltis longissima (Blume) T. Moore in Bedd., Ferns S. Ind. pl. 176. 1864 (excl. nom.) ; Ferns Br. Ind. t. 388. 1876 (excl. nom.) .
土生植物。根状茎长而横走,粗1-1.5厘米,被鳞片;鳞片卵圆形,盾状着生,长约4毫米,宽约3毫米,质薄,边缘不整齐,褐色。植株高达1米,叶远生;叶柄禾秆色,长约30-40厘米,粗约5毫米,光滑无毛;叶片单叶不分裂或3裂至羽状深裂;裂片斜展,通常5-10对,长约15-20厘米,宽约3-4厘米,顶端渐尖,边缘全缘。叶脉两面均极明显,侧脉曲折,不直达叶边;小脉网状,具分叉的内藏小脉。叶片膜质,两面光滑无毛。孢子囊群大,圆形,在裂片中脉两侧各1行,位于中脉与边缘之间,在叶片表面形成明显的乳头状突起。
产云南、海南。生于林下石上,海拔200-1200米。越南、柬埔寨、泰国、印度、斯里兰卡、菲律宾、马来西亚、印度尼西亚、新几内亚岛、澳大利亚及波利尼西亚等也有分布。模式标本采自澳大利亚。