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Key to families | Table of families and genera
This text currently parallels The Jepson Manual: Vascular Plants of California, Second Edition that is now available at the University of California Press.
Text appearing in blue on this page will not appear in the printed book; it will be displayed only on the Web. Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.
Plant in soil or rock crevices; rhizome short- to long-creeping, scales overlapped, narrowly linear, light- to red- or medium-brown, often with dark mid-stripe.
Leaf: erect, persistent, < 1 m; stipes ± cylindric, generally dark or red-brown to ± black, ± shiny, glabrous; blade 1–4- pinnate; segments generally stalked, generally free, linear to rounded, lobed or not, often folded lengthwise when dried; veins generally free.
Sporangia: in ± continuous, submarginal bands, among a ± white to ± yellow exudate or not; segment margin generally recurved, generally modified; spores tan to light yellow.
± 35 species: tropics, temperate, few in Eur, 0 in Asia. (Greek: dusky, from blue-gray leaves) [Kirkpatrick 2007 Syst Bot 32:504–518] Occ cultivated; as defined by Tryon (1957), polyphyletic (Kirkpatrick, 2007).
Unabridged references: [Kirkpatrick, R.E.B. 2007. Investigating the monophyly of Pellaea (Pteridaceae) in the context of a phylogenetic analysis of cheilanthoid ferns. Syst Bot 32:504–518; Tryon 1957 Ann Missouri Bot Gard 44(2):125–193]
Unabridged note: Occ cult. Molecular data suggest Pellaea in the sense of Tryon (1957) is polyphyletic with monophyletic Astrolepis and Pellaea sect. Platyloma, as well as elements of Paragymnopteris and Paraceterach nested within (Kirkpatrick, 2007).
1. Lf 1-pinnate, pinnae unlobed or deeply 2(3)-lobed
2. Pinnae lance-ovate, deeply 2(3)-lobed; fracture lines at base of stipe many; rhizome scales without dark mid-stripe ..... P. breweri
2' Pinnae rounded, unlobed; fracture lines at base of stipe 0; rhizome scales with dark mid-stripe ..... P. bridgesii
1' Lf 2–4-pinnate, pinnae compound.
3. Lf 2–4-pinnate
4. Segment without mucro, generally 6–15 mm, 3–10 mm wide; stipe ± light brown ..... P. andromedifolia
4' Segment with mucro generally 2–6(8) mm, 0.5–2(4) mm wide; stipe dark brown to ± black ..... P. mucronata var. mucronata
3' Lf 2-pinnate
5. Segment 5–15 × longer than wide, > costa ..... P. brachyptera
5' Segment 1–4 × longer than wide, < costa
6. Fertile segment generally appearing folded in half, recurved margins ± meeting abaxially; c&s SNH, TR, PR, SNE, DMtns (except Providence, New York mtns) ..... P. mucronata var. californica
6' Fertile segment not appearing folded in half, recurved margins not meeting abaxially; DMtns (Providence, New York mtns) ..... P. truncata
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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