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FOC | Family List | FOC Vol. 2-3 | Polypodiaceae | Microsorum

5. Microsorum pteropus (Blume) Copeland, Univ. Calif. Publ. Bot. 16: 112. 1929.

有翅星蕨 you chi xing jue

Polypodium pteropus Blume, Enum. Pl. Javae 2: 125, add. 3. 1828; Colysis pteropus (Blume) Bosman; C. tridactyla (Wallich ex Hooker & Greville) J. Smith; C. zosteriformis (Wallich ex Mettenius) J. Smith; Drynaria tridactyla (Wallich ex Hooker & Greville) Fée; Kaulinia pteropus (Blume) B. K. Nayar; K. pteropus var. minor (Beddome) B. K. Nayar & S. Kaur; K. zosteriformis (Wallich ex Mettenius) B. K. Nayar & S. Kaur; Microsorum brassii Copeland; M. paucijugum (Alderwerelt) K. Iwatsuki & M. Kato; M. pteropus f. minor (Beddome) Ching; M. pteropus var. minor (Beddome) C. Christensen & Tardieu; M. pteropus var. zosteriformis (Wallich ex Mettenius) S. Kaur & Subh. Chandra; M. zosteriforme (Wallich ex Mettenius) Ching; Phymatodes tridactyla (Wallich ex Hooker & Greville) C. Presl; Pleopeltis pteropus (Blume) T. Moore; P. pteropus var. minor Beddome; P. pteropus var. zosteriformis (Wallich ex Mettenius) Beddome; P. tridactyla (Wallich ex Hooker & Greville) T. Moore; P. zosteriformis (Wallich ex Mettenius) Beddome; Polypodium aquaticum Christ; P. paucijugum Alderwerelt; P. pteropus var. minor (Beddome) Y. C. Wu, K. Wong & Pong; P. raapii Alderwerelt; P. tridactylon Wallich ex Hooker & Greville; P. udum Christ; P. zosteriforme Wallich ex Mettenius.

Rhizome 0.5-5 mm in diam., dorsiventrally flattened, not white waxy, closely attached to substrate. Scales pseudopeltate, narrowly ovate or triangular, 1.5-5 × 0.4-1 mm, margin entire, apex acute, clathrate or subclathrate, central region bearing multiseptate hairs at least when young. Fronds not or slightly dimorphic. Stipe present, up to 12 cm, 1-2 mm in diam. Lamina simple, forked, trifid or pinnatifid, narrowly elliptic, 3.5-30 × 0.2-5.5 cm, thinly herbaceous to membranous, abaxial surface often densely covered with clavate hairs, base narrowly decrescent and winged on stipe for a considerable part, margin entire, apex acute to acuminate; veins prominent and distinct, 3-7 mm apart, ± straight or zigzag, dichotomously branched from ca. middle to near margin, connecting veins 1-6 between adjacent secondary veins, anadromous, smaller veins ± sunken and indistinct, or prominent and distinct, each main areole usually including a number of smaller areoles, smaller veins variously anastomosing, free veinlets simple or once or twice forked. Sori separate, irregularly scattered, sometimes forming 2-8 irregular rows between veins, orbicular or in part elongate, superficial or slightly sunken, absent in marginal areoles, generally absent from costal areoles; paraphyses simple, uniseriate hairs with glandular top cells.

On wet rocks along or in streams, often under water in rainy season; 200-1200 m. Fujian, Guangxi, Guizhou, Hainan, Hong Kong, Hunan, Jiangxi, Taiwan, Yunnan [India, Indonesia, Japan, Laos, Malaysia, Myanmar, Nepal, New Guinea, Philippines, Thailand, Vietnam].

Microsorum pteropus sometimes has the sori ± in one row between the veins. The venation consists of large areoles extending nearly to the margin on both sides of the costa.


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