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FNA | Family List | FNA Vol. 2 | Thelypteridaceae | Thelypteris

9. Thelypteris ovata R. P. St. John in Small, Ferns S. E. States. 230, with plate. 1938.

Ovate maiden fern

Christella ovata (R. P. St. John) A. Löve & D. Löve; Dryopteris ovata (R. P. St. John) Broun

Stems usually long-creeping, 3--6 mm diam. Leaves monomorphic, evergreen, (0.5--)1--4 cm apart, (30--)55--135(--165) cm. Petiole straw-colored, 15--80 cm × 2--6 mm, at base with tan to brownish, linear-lanceolate, hairy scales. Blade about equaling petiole length, broadest at base, gradually to somewhat abruptly tapered to pinnatifid apex. Pinnae (5--)10--25 × 0.8--2.2 cm, incised 4/5 of width; segments oblique, somewhat curved, basal pair from middle pinnae often elongate parallel to rachis; proximal pair of veins from adjacent segments reaching margin at or just above sinus. Indument abaxially of hairs mostly 0.2--0.5 mm on costae, veins, and blade tissue, also sometimes of a few tan scales on costae and rachises; blades adaxially glabrous except along rachises and costae. Sori round, supramedial to inframarginal; indusia tan, hairy, hairs mostly 0.2--0.4 mm; sporangia glabrous. 2 n = 72.

Varieties 2 (2 in the flora): North America, Mexico, West Indies, Central America.

1 Scales usually absent on costae abaxially; blade tissue glabrous adaxially; petiole base and stem scales brownish.   9a var. ovata
+ Scales few, very narrow, on costae abaxially; blade tissue minutely pubescent or glabrous adaxially; petiole base and stem scales tan.   9b var. lindheimeri

Lower Taxa


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