Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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Alan R. Smith and Thomas Lemieux

Plants in soil; rhizome short- to long-creeping, scales generally hairy, uniformly brownish
Leaf: petiole in transverse section at base with 2 crescent-shaped vascular strands; blade generally with needle-like, clear hairs on axes or between veins; 1° and 2° axes generally grooved on upper surface, grooves not continuous from one axis to next; veins free or lowest pair running together at or near deepest part of sinus
Sporangia in generally round sori on veins; indusia reniform or round-reniform; stalk cells in 3 rows; spores elliptic, scar linear
Genera in family: 1–30 genera (depending on interpretation), ± 900 species: worldwide, especially tropical; several cultivated.
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