Flora of North America species comparison

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Ctenitis submarginalis

brownhair lacefern
Petiole

scales brown, linear, 10–20 × 0.8–1.5 mm, lax, not densely tangled or woollike.
Blade

1-pinnate-pinnatifid, glabrous or pubescent on both surfaces, glandular abaxially and occasionally adaxially, glands pale yellow, ca. 0.5 mm.
Ultimate segments

4–7 mm wide, margins ciliate.
Veins

6–10(–15) pairs per segment, unbranched.
Sori

medial to supramedial;

indusia present but soon deciduous or completely absent.
Basal

pinnae 8–18 × 2–3 cm, equilateral, incised more than 3/4 distance to costae.

Ctenitis submarginalis
Habitat Cypress swamps, hammocks, old forested spoil banks
Elevation 0 m (0 ft)
Distribution
from FNA
FL; LA; e Mexico; s Mexico; Central America; West Indies in Hispaniola; South America to Uruguay
[BONAP county map]
Discussion

Combining authorship of the accepted name sometimes has been incorrectly attributed to E. B. Copeland (1947). The Louisiana population of Ctenitis submarginalis occurs more than 960 km from populations in Florida and represents the northernmost locality for the species (G. P. Landry and W. D. Reese 1991). Unlike most ferns in North America, the plants in the Louisiana population are nonseasonal, producing leaves and sori throughout the year.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 2.
Parent taxa Dryopteridaceae > Ctenitis
Sibling taxa
C. sloanei
Synonyms Polypodium submarginale, Dryopteris submarginalis
Name authority (Langsdorff & Fischer) Ching: Sunyatsenia 5: 250. (1940)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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