產地生境
產廣東 (陽春) 、廣西 (桂平、賀縣、隆林、龍州、寧明、藤縣、田林) 、貴州 (安順、望謨) 、雲南 (峨山、鳳慶、福貢、貢山、廣南、河口、景東、景洪、金坪、臨滄、綠春、瀘水、麻栗坡、馬關、勐臘、孟連、勐侖、屏邊、雙柏、騰衝、文山、西疇、新平、硯山、盈江、永德、元江、元陽、鎮康) 和西藏 (墨脫) 等省區。生於海拔500-1500米林下。模式標本采自雲南。本種提示
本變種與其他變種的區別在於，羽片少，3 (2-8)對，羽片中部寬達3(1.7-5)厘米。集中分布於喜馬拉雅地區。相關物種
線蕨（原變種）Colysis elliptica (Thunb.) Ching var. elliptica曲邊線蕨（變種）Colysis elliptica (Thunb.) Ching var. flexiloba
長柄線蕨（變種）Colysis elliptica (Thunb.) Ching var. longipes
寬羽線蕨（變種）Colysis elliptica (Thunb.) Ching var. pothifolia Ching
參考文獻
9e.滇線蕨（變種）（中國蕨類植物圖譜）圖版55：1-3var. pentaphylla (Baker) L. Shi et X. C. Zhang in Acta Phytotax. Sin. 37 (1): 77. 1999. ——Colysis pentaphylla (Baker) Ching, Bull. Fan Mem. Inst. Biol. 4: 332. 1933; C. Chr., Ind. Fil. 56. 1934: Ching, Ic. Fil. Sin. 4: 199. Pl. 199. 1937: Tagawa et K. Iwats., Fl. Thailand 4: 540. 54. 1989: Shing in W. T. Wang, Vascul. Pl. HengduanMts. 1: 181. 1993. ——Polypodium pentaphyllum Baker, Ann. Bot. 5: 478. 1891; C.Chr., Ind. Fil. Suppl. 126. 1913. ——Gymnogramme (Selliguea) pentaphylla Baker, Darling et Son, Bull. Miscellan. Informat. 233. 1898. ——Polypodium mediosorumChing, Bull. Fan Mem. Inst. Biol. 2: 19. Pl. 4. 1931: C. Chr., Ind. Fil. Suppl. 153. 1934. ——Colysis longisora (Baker) Ching, Bull. Fan Mem. Inst. Biol. 4: 331. 1933; C. Chr., Ind. Fil. 56. 1934; Tardieu et C. Chr. Fl. Indo-Chine 7 (2): 494. 1941; V. G. Tu, Novosti Syst. Vyssh. Rast. 18: 33. 1981. ——Gymnogramme longisora Baker, J. Bot. (London) 267. 1890. ——Polypodium longisorum (Baker) C. Chr., Ind. Fil. 541. 1906; Ching, Bull. Fan Mem. Inst. Biol. 2: 19. pl. 3. 1931; C. Chr., Ind. Fil. Suppl. 152. 1934.
