Thelypteris deltoidea (Sw.) Proctor

  • Authority

    Proctor, George R. 1989. Ferns of Puerto Rico and the Virgin Islands. Mem. New York Bot. Gard. 53: 1-389.

  • Family

    Thelypteridaceae

  • Scientific Name

    Thelypteris deltoidea (Sw.) Proctor

  • Description

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    Species Description - Plants tenestrial or rarely epiphytic; rhizome ascending or erect, sometimes standing as much as 25 cm above the ground, 4-5 mm thick (excluding dense mass of roots and old stipe bases), bearing at apex numerous dark brown, glabrous to sparsely ciliate, lance-linear to lanceolate, attenuate scales 6-11 mm long. Fronds clustered, erect, 25-70 cm long; stipes very short, 2-6(-13) cm long, grooved and more or less pilose on adaxial side, otherwise glabrate or minutely puberulous. Blades 22-65 cm long, with a linear lower portion 7-30 cm long consisting of 11-20 pairs of much reduced, deflexed pinnae 7-15 mm long, abruptly expanded distally to an oblong, ovate, or deltate apical portion 15-40 cm long, 10-25 cm broad, the apex abruptly acuminateattenuate, pinnatifid; rhachis densely and minutely pubemlous throughout, and also densely hirsute chiefly on adaxial side; lar%er pinnae narrowly oblong, 1.5-3 cm broad, obliquely pinnatifid, sessile; segments oblong-falcate, 4-6 mm broad, very close with narrowly acute sinuses, acute at apex, the margins entire; veins 8-12 pairs, simple, prominulous, glabrous adaxially, together with the costules strigose-setulose beneath; tissue dark green, firm, opaque. Sori round, supramedial; indusium dark brown, short-pubescent, soon withering.

  • Discussion

    Fig. 59.

    Basionym. Polypodium deltoideum Swartz, Prodr. 133. 1788.

    Type. Swartz, from Jamaica (S; isotypes Herb. Thunb. 24686, 24687, UPS; Herb. Willd. 19767, B, ex Desvaux).

    Syn. Aspidium deltoideum (Swartz) Swartz, J. Bot. (Schrader) 1800(2): 34. 1802.

    Nephrodium deltoideum (Swartz) Desvaux, Mem. Soc. Linn. Paris 6: 259. 1827.

    Lastrea deltoidea (Swartz) Moore, Index fil. 89. 1858.

    Bryopteris deltoidea (Swartz) Kuntze, Revis. gen. pl. 2: 812. 1891.

  • Distribution

    General Distribution. Greater Antilles, St. Thomas, and Martinique.

    Martinique South America| United States Virgin Islands South America|