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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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Trees; rhizome modified as a trunk, generally short-creeping, ascending, or erect; scales especially on trunk tip, stipe bases, small to generally large, generally uniformly tan to brown, among hairs or not. Leaf: generally tufted or short-spaced, 1–1.5 m, generally ± alike; stipe firm, not easily crushed, base darker or not; blade 2-pinnate [(simple)], ± glabrous or with hairs, hair-like scales, or gland-tipped hairs on axes, veins generally free (netted); axes generally grooved adaxially. Sporangia: sori ± spheric; indusia 0 [saucer- or cup-like to spheric]; spores variously ornamented, scar 3-rayed.
5–6 genera, ± 600 species: worldwide, generally tropics. [Lehnert 2011 Brittonia 63:11–45] Some recognize only 1 genus in family. —Scientific Editor: Alan R. Smith.
Trunk generally 1, often thickened by fibrous mass of adventitious roots basally, generally with distinct, ± round or oblong leaf scars. Leaf: generally 2-pinnate, stipe scales of various sizes, not intergrading with hairs or black spines, cells of ± 1 size, orientation (not clearly smaller, of different orientation on margin). Sporangia: sori in 1 row on each side of pinnule lobe midvein.
± 100 species: ± worldwide, southern temperate, tropics (except Africa). (Greek: sphere, fern, for sori) [Clark & Summers 2013 Madroño: in press]
Trunk < 1  m, 10–15 cm diam. Leaf: 1–1.5 m; stipe <= 50 cm, basal scales <= 50 mm, ± 0.1–5 mm wide, ± white or tan, translucent, among much shorter, bristle-like, dark hairs, margins with bristle-like teeth; blade <= 3.5 m, narrow-elliptic or lanceolate; pinnae <= 65 cm; pinnules <= 12 cm, <= 2.5 cm wide, pinnately lobed ± to midribs (i.e. making frond nearly 3-pinnate), lobes crenate-serrate.
Coastal, open, rocky cliff faces, in granitic or sedimentary sandstone soils in fog belt; < 220 m. s Channel Islands (Santa Catalina Island); Oregon, Hawaii, western Australia; native to eastern Australia. [Cyathea cooperi (F. Muell.) Domin] 20+ plants, 4+ years old, in California population; can survive wide range of conditions, especially with adequate water, so spread is expected. Commonly sold in nurseries in coastal California, southern Oregon. [Online Interchange]
Unabridged note: Expanded author citation: Cyathea cooperi (Hook. ex F. Muell.) Domin; Sphaeropteris cooperi (Hook. ex. F. Muell.) R.M. Tryon
Previous taxon: Sphaeropteris
Next taxon: Dennstaedtiaceae
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jul 28 2014
Citation for this treatment: [Author of taxon treatment] 2013. Sphaeropteris, Revision 1, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=98705, accessed on Jul 28 2014
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