Cleistoblechnum Gasper & Salino, 2016
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publication ID |
https://doi.org/ 10.11646/phytotaxa.275.3.1 |
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persistent identifier |
https://treatment.plazi.org/id/0D7187AA-7D6B-FF9A-AF83-FF244DD8FC0C |
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treatment provided by |
Felipe |
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scientific name |
Cleistoblechnum Gasper & Salino |
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1. Brainea insignis (Hook.) J.Sm., Cat. Kew Ferns View in CoL 5. 1856. — Bowringia insignis Hook. , Hooker’s J. Bot. Kew Gard. Misc. 5: 237–238, pl. 2. 1853.
Cleistoblechnum Gasper & Salino , gen. nov. — Type: Cleistoblechnum eburneum (Christ) Gasper & Salino, Bull. Acad. Int. Géogr. Bot. 1902: 233 , fig. c. Figs. 3F View FIGURE 3 , 6C View FIGURE 6 .
Diagnosis: Rhizomes bearing at apices a tuft of orange-brown scales; fronds slightly dimorphic, blades proximally with pinnae reduced to small auricles; pinnae adnate, strongly revolute; sori linear, remaining enclosed by erose-margined indusia at maturity.
Plants terrestrial; rhizomes short, ascending or suberect, non-stoloniferous, slender, bearing at apices a tuft of orange-brown, glabrous, lanceolate, entire scales, some of these with a discrete, well-defined, darkened, atropurpureous mid-stripe; fronds slightly dimorphic, the fertile ones a bit longer, and with narrower, more widely spaced pinnae that are narrowed at their bases (vs. broader in sterile fronds); stipes short, ca. 5–10 cm long, slender, stramineous to tan, with scales confined to the very base, similar to those of rhizomes; blades thickened, concolorous, pinnatisect, linearoblanceolate, the pinnae reduced in the proximal 1/4–1/3 to small auricles ca. 1–2 mm long, 3–5 mm broad, apices pinnatifid; rachises glabrous; buds absent; aerophores absent; pinnae adnate, oblong to narrowly deltate, margins entire but strongly revolute; veins inconspicuous or completely hidden in the subcoriaceous laminae, free, furcate, not reaching laminar margins; sori linear, remaining enclosed by erose-margined indusia at maturity; x = 33.
Species number, comments, etymology, and distribution:— One species with two varieties, endemic to Taiwan and mainland China. Cleistoblechnum resembles Struthiopteris , from which it is distinguished by slightly dimorphic fronds, the segment margins strongly inrolled, and the much more coriaceous blades. This is closely related to Blechnopsis and Sadleria (Gasper et al. in press). Chambers and Farrant (1996b) reported that the sori remain enclosed by erose indusia at maturity, a condition that suggests the generic name.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.