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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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Perennial herb, in soil or on or among rocks; rhizome creeping to erect, scaly. Leaf: generally all ± alike (or of 2 kinds, fertile, sterile), generally < 50 cm, often < 25 cm; stipe generally thin, wiry, often dark, ×-section with vascular strands generally 1–3, less often many in circle; blade generally pinnate or ± palmate-pinnate (see Adiantum), often >= 2-compound, abaxially often with glands, ± powdery exudate, hairs, or scales; segments round, oblong, fan-shaped, or other, veins generally free. Sporangia: in sori or not, marginal, submarginal, or along veins, covered by recurved, often modified segment margins (false indusia) or not; true indusia 0; spores spheric, sides flat or not, scar with 3 radiating branches.
± 40 genera, 500 species: worldwide, especially dry areas. [Windham 1993 FNANM 2:122–186] California members of Cheilanthes moved to the distantly related Myriopteris; Pellaea breweri to be moved as well, from a to-be-redefined Pellaea; traditional, often untenable limits of genera outside California also being clarified using molecular phylogenetics. —Scientific Editors: Alan R. Smith, Thomas J. Rosatti.
Key to Pteridaceae
Plant generally in soil; rhizome erect or short- to long-creeping, scaly or hairy. Leaf: generally alike, 1–4-pinnate, erect-arched; stipe, axes grooved adaxially, grooves from rachis to costa connected; pinnules on basal side of lowermost pinnae more developed (except Pteris vittata). Sporangia: among hair-like structures in continuous, marginal bands; false indusia along segment margins except at bases, tips, and between lobes, partly covering sporangia, scarious.Key to Pteris
± 250–300 species: generally tropics, subtropics. (Greek: feather, for pinnae, or ancient name for ferns in general) Popular in cultivation.
Rhizome stout, short-creeping. Leaf: 60–150(200) cm; stipe generally > blade, ± glabrous except base; blade light green to yellow-green, 2–4-pinnate; pinnae many pairs, basal 2–3-pinnate.
2n=±232. Habitats uncertain; 250–600 m. Central Coast, San Gabriel Mountains; native to Australia, New Zealand, Polynesia. [Online Interchange]
Previous taxon: Pteris cretica
Next taxon: Pteris vittata
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Feb 27 2015
Citation for this treatment: [Author of taxon treatment] 2013. Pteris, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=40259, accessed on Feb 27 2015
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|Geographic subdivisions indicated for the distribution of Pteris tremula|| Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).
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