Pteris macilenta A.Rich.

국표에 없다.

DETAILED DESCRIPTION

Terrestrial ferns. Rhizomes short, erect, scaly. Stipes 0.1–0.5 m long, yellow-brown, base scaly. Laminae 0.25–0.9 × 0.15–0.5 m, light green, 3-pinnate, ovate, thin; veins reticulated along midribs but free elsewhere. Pinnae widely spaced; most lower secondary pinnae stalked or sessile. Ultimate segments 5–15 × 3–5 mm, oblong, apices deeply toothed, margins almost smooth. Sori continuous along pinna margins on a marginal vein, protected by a membranous inrolled pinna margins.

SIMILAR TAXA

Pteris macilenta is most similar to P. saxatilis which is rather like a diminutive form of it. Pteris saxatilis differs from P. macilenta by the very widely spaced primary and secondary pinnae; laminae 0.15–0.5 × 0.12–0.25 m, and the ultimate segments up to 15 × 5 mm. Although Brownsey & Smith-Dodsworth (2000) state that intergrades exist between P. macilenta and both P. carsei (as P. comans) and P. saxatilis, this seems more likely to refer to hybrids between the latter two species as P. macilenta is genetically distinct from both P. comans and P. saxatilis and unable to hybridise with them (J.E. Braggins pers. comm.). Pteris carsei differs from both P. macilenta and P. saxatilis by the coriaceous (leathery) fronds, reticulate venation, overlapping pinnae and large ultimate segments. Pteris epaleata can be distinguished from P. macilenta as well as P. carsei and P. saxatilis by its dull adaxial frond surface.

DISTRIBUTION

Endemic. New Zealand: North Island (widespread except for the central volcanic plateau and adjacent main axial ranges), South Island (common in the north, reaching a western southern limit near Greymouth and in the east on Banks Peninsula where it may have been planted (Wilson 2009)), Chatham Islands.

HABITAT

Coastal to montane (in northern areas). Usually in dry, less heavily vegetated sites in forest but also on cliff faces and banks in light scrub. Especially common overlying calcareous or other base-rich rocks.

Pteris macilenta A.Rich. | Plants of the World Online | Kew Science

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