Hairy maiden fern

Aspidium hispidulum Decaisne, Nouv. Ann. Mus. Hist. Nat. 3: 346. 1834; Christella hispidula (Fée) Holttum; Cyclosorus quadrangularis (Fée) Tardieu-Blot; Dryopteris hispidula (Decaisne) Kuntze; D. quadrangularis (Fée) Alston; Thelypteris quadrangularis (Fée) Schelpe

Varieties 4 (1 in the flora): tropical and subtropical, North America, Mexico, West Indies in the Antilles, Central America, South America, Asia, Africa.

This species and the next are included in Christella subg. Christella by R. E. Holttum (1982).

The relationship between Old World and New World varieties is unstudied.

Lower Taxon

• Thelypteris hispidula var. versicolor (R. P. St. John) Lellinger