Compilation
Astrolepis sinuata

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Name

Identification
Isotype of Notholaena sinuata Sw. [family ADIANTACEAE ] (stored under name); Verified by R. McVaugh, 1951 Astrolepis sinuata (Lag. ex Sw.) Benham & Windham [family ADIANTACEAE ] Verified by D.M. Benham, 1989
Related name
  • Notholaena sinuata
  • Notholaena chalcolepis
  • Astrolepis sinuata

Flora

Entry for Astrolepis sinuata (Lagasca ex Swartz) D. M. Benham & Windham [family ]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 2,
Names
Astrolepis sinuata (Lagasca ex Swartz) D. M. Benham & Windham [family ], Amer. Fern J., 82: 56. 1992
Acrostichum sinuatum Lagasca ex Swartz [family PTERIDACEAE], Syn. Fil., 14. 1806
Cheilanthes sinuata (Lagasca ex Swartz) Domin [family ADIANTACEAE]
Notholaena sinuata (Lagasca ex Swartz) Kaulfuss [family ADIANTACEAE]
Treatment Author(s)
Dale M. Benham
Michael D. Windham
Information
Stems compact to short-creeping; stem scales uniformly chestnut brown or with lighter margin, to 6 mm, margins ciliate-dentate. Leaves 11--130 cm. Blade pinnate-pinnatifid, pinna pairs 30--60. Pinnae deltate to ovate, largest 7--35 mm, symmetrically lobed, lobes 6--14 often acute, separated by deep sinuses; abaxial scales concealing surface, lanceolate, usually 1--1.5 mm, ciliate-dentate with delicate marginal projections; adaxial scales sparse, deciduous, elongate, stellate, attached at base, body 1--2 cells wide, attached at base. Sporangia containing 32 or 64 spores.
Discussion
Astrolepis sinuata comprises two cytotypes that tend to occupy different ranges and are treated here as subspecies. Sexual diploid populations (subsp. mexicana ) are widely distributed in Mexico, but in the flora they are apparently confined to the Davis and Chisos mountains of Texas and to southeast New Mexico. The range of the apogamous triploid (subsp. sinuata ) extends from Argentina to the southwestern United States, with a disjunct population in Georgia. Isozyme studies suggest that subsp. sinuata was derived from the diploid subsp. mexicana through autopolyploidy (D. M. Benham 1989).

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