Pseudocystopteris subtriangularis
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2023-11-09 07:51
Pseudocystopteris subtriangularis (Hook.) Ching in Acta Phytotax. Sin. 9: 78. 1964; Ic. Corm. Sin. 1: 177, 1972; Fl. Tsinling. 2: 93. 1974; Y. L. Chang et al., Sporae Pterid. Sin. 238, t. 40, f. 25, 29. 1976; Ching et S. K. Wu in C. Y. Wu, Fl. Xizang. 1: 127. 1983; Jarrett, Ind. Fil. Suppl. 5: 163, 1985; Z. R. Wang in W. T. Wang, Vasc. Pl. Hengduan Mount. 1: 76. 1993. ——Asplenium subtriangulare Hook. in Hook. et Bak., Syn. Fil. 225. 1867. ——Athyrium subtriangulare Bedd., Ferns Brit. Ind. t. 242. 1868; Bir in Nova Hedwigia 4 (1+2): 167, t. 53, f. 6-8. 1962; H. Ito in Hara, Fl. East, Himal. 209. 1971. ——Asplenium spinulosum var. subtriangulare Clarke in Trans. Linn. Soc. 2. Bot. 1: 487. 1880. ——Athyrium spinulosum var. subtriangulare C. Chr., Ind. Fil. 146. 1906. ——Asplenium spinulosum Clarke in Trans. Linn Soc. 2. Bot. 1: 486. 1880. ——Athyrium spinulosum sensu Bedd., Handb. Ferns Brit. Ind. 161. 1883. ——Athyrium hookerianum Moore, Ind. Fil. 185. 1860. nom. nud; Milde, Fil. Europ. Atlant. Asia. 57. 1867. ——Athyrium longipes Christ in Bull. Soc. Bot. France 52. Mem. 1: 48. 1905; C. Chr., Ind. Fil. 143. 1906. ——Pseudocystopteris longipes (Christ) Ching in Acta Phytotax. Sin. 9: 78. 1964; Y. L. Chang et al., Sporae Pterid. Sin. 238, t. 41, f. 1-2. 1976; B. Bartholomew et al. in Journ. Arnold Arbor. 64: 24. 1983; Jarrett, Ind. Fil. Suppl. 5: 163. 1985. ——Athyrium subtriangulare Bedd. var. sikkimensis Bir in Nova Hedwigia 4: 168. 1962. ——Athyrium sikkimense Love et Love in Taxon 26 (2-3): 326. 1977 et in Love, Love et Pic. Ser., Cytotax. Atlas Pterid. 284. 1977, non Ching 1983, nom. in val. ——Pseudocystopteris tibetica Ching in Acta Phytotax. Sin. 9: 80. 1964; Jarrett, Ind. Fil. Suppl. 5: 163. 1985. ——Pseudocystopteris remota Ching in Acta Phytotax. Sin. 9: 84. 1964; Y. L. Chang et al., Sporae Pterid. Sin. 237, f. 75, 238, t. 40, f. 30-31. 1976; Jarrett, Ind. Fil. Suppl. 5: 163. 1985. ——Pseudocystopteris spinulosa var. taipaishanensis Ching in Fl. Tsinling. 2: 93, 212. 1974. ——Pseudocystopteris sparsa Ching et S. K. Wu in C. Y. Wu, Fl. Xizang. 1: 124, t. 31, f. 1-3. 1983. ——Pseudocystopteris decipiens Ching et S. K. Wu in C. Y. Wu, Fl. Xizang. 1: 125, t. 32, f. 4-6. 1983. ——Pseudocystopteris reflexipinnula Ching et S. K. Wu in C. Y. Wu, Fl. Xizang. 1: 127, t. 30, f. 1-3. 1983. ——Pseudocystopteris purpurascens Ching et S. K. Wu in C. Y. Wu, Fl. Xizang. 1: 128, t. 32, f, 1-3. 1983.
根状茎细长横走,直径3-4毫米,黑褐色,有稀疏的浅褐色卵状披针形鳞片伏生;叶远生。能育叶长 (13-) 60-70 (-90) 厘米;叶柄长 (5-) 30-40 (-55) 厘米,基部直径 (1-) 3-4 (-5) 毫米,和根状茎同色,密被鳞片,近地表处常密生金黄色长柔毛,向上为禾秆色,偶有浅褐色披针形膜质鳞片;叶片广卵状三角形至卵状三角形,长 (8-) 25-35 (-40) 厘米,基部宽 (10-) 20-30 (-45) 厘米,先端渐尖,二至三回羽状;羽片 (10-) 15-20对,近互生,斜向上,彼此接近,基部一对羽片略长,且较宽,长约14-20 (-28)厘米,中部宽5-9 (-12)厘米,椭圆形至椭圆状倒披针形,渐尖头,向基部逐渐变狭,近对称,有5-8毫米短柄,近对生,距上面一对羽片 (1-) 4-5厘米,二回羽状;基部一对羽片有一回小羽片 (10-) 14-20对,上先出,平展或稍斜展,中部以下的小羽片逐渐缩短,呈长圆状披针形或卵状三角形,先端钝,有通常张开的尖齿;中部的一回小羽片长圆状披针形,长约2.5-4.5 (-7) 厘米,基部宽1-1.5厘米,短渐尖或急尖头,基部近平截,无柄,分离或略与羽轴合生,彼此接近,一回羽状;二回小羽片10-12对,平展或稍斜上,长圆形,长5-8毫米,宽2.5-4毫米,钝头,基部与小羽轴两侧的狭翅相连,边缘锐裂或与先端同具张开的尖锯齿;第二对羽片比基部一对略小而为长圆形;上部羽片披针形,渐尖头,基部不变狭,一回羽状,小羽片羽裂;末回裂片先端及边缘尖锯齿。叶脉两面可见,在末回小羽片上羽状分叉,小脉单一,达于锯齿先端。叶干后草质,绿色或绿褐色,小羽轴及主脉上面稍有短刺状突起,叶轴及各回羽轴的上面和下面多少被有短毛,叶脉上面偶具散生腺体状短毛或多细胞节状毛,在羽轴基部偶具一二小鳞片。孢子囊群圆形,生于小脉背上,每末回裂片一至数对;囊群盖膜质,圆肾形,浅褐色。孢子具薄而透明的周壁,表面具褶皱。染色体数目n=40,80。
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