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

Perennial, in soil or on or among rocks; rhizome creeping to erect, scaly
Leaves generally all ± alike (or of 2 kinds, fertile and sterile), generally < 50 cm, often < 25 cm; petiole generally thin, wiry, often dark, in transverse section with vascular strands generally 1–3, less often many in a circle; blade generally pinnate or ± palmate-pinnate (see Adiantum ), often 2 or more compound, lower surface often with glands, ± powdery exudate, hairs, or scales; segments round, oblong, fan-shaped, or otherwise, veins generally free
Sporangia in sori or not, marginal, submarginal, or along veins, sometimes covered by recurved, often modified segment margins (false indusia); true indusia 0; spores spheric, sides sometimes flat, scar with 3 radiating branches
Genera in family: ± 40 genera, 500 species: worldwide, especially dry areas. Definition of Cheilanthes and related genera problematic; traditional limits often untenable.


Plant in soil or rock crevices; rhizome short-creeping, scales variously colored
Leaf < ± 1 m; petiole cylindric, generally dark reddish brown to blackish, shiny, ± scaly at base; blade 2–3-pinnate or ± palmate-pinnate (1st division ± palmate, subsequent ones pinnate), segments stalked, fan-shaped or oblong, generally lobed, toothed, or both; axes, blades lacking colored exudate
Sporangia borne along veins on and covered by highly modified, recurved part of segment margin, appearing to run together at maturity; false indusia ± semi-circular to linear; spores generally smooth, tan
Species in genus: ± 200 species: tropical, temp
Etymology: (Greek: unwettable)
Widely cultivated.


A. capillus-veneris L.


Leaf generally 20–40(7–50+) cm; petiole dark brown to blackish; blade 2–3-pinnate; segments cut or lobed often > 1/4 way to base, often with < 4 ± irregular lobes, margins at base converging at 45–90°, stalk color often extending gradually into base, midvein often extending part way along 1 margin
Sporangia: sori (and false indusia) 3–11, rarely 2 per segment, generally < 5 mm
Chromosomes: 2n=60
Ecology: Uncommon (or locally common). Shaded, rocky or moist banks, exposed sites or not
Elevation: < 2000 m.
Bioregional distribution: North Coast Ranges, Cascade Range Foothills, n Sierra Nevada Foothills, s High Sierra Nevada, San Joaquin Valley, Central Coast, Outer South Coast Ranges, Southwestern California (except South Coast), Great Basin Floristic Province, Desert
Distribution outside California: generally s US, worldwide, especially temperate
Widely cultivated (including many cultivars); recency of collections, erratic distribution suggest sp. alien in CA
Horticultural information: IRR or WET, DRN: 4, 5, 6 &SHD: 2, 3, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24.

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bioregional map for ADIANTUM%20capillus-veneris being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Adiantum capillus-veneris
Retrieve dichotomous key for Adiantum
Overlay Consortium of California Herbaria specimen data by county on this map
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