Hymenophyllum flexuosum A.Cunn.

식물/들꽃-처녀이끼과(Hymenophyllaceae) 2024. 11. 13. 14:22

국표에 없다.

DETAILED DESCRIPTION

Terrestrial or low epiphytic fern forming diffuse patches. Rhizomes long-creeping, thin, brittle. Fronds often widely spaced along rhizomes or in widely spaced aggregations. Stipes 30–110 mm long, slender, glabrous; stipes and rachises with a prominent broad, wavy-undulose, crisped wing running almost to stipe base. Laminae ovate 3–4-pinnate, 60–300 × 30–140 mm, bright green to yellow-green, glabrous. Ultimate segments oblong, margins smooth. Sori terminating ultimate segments, not sunken in lamina, solitary or paired, with many on each primary pinna. Indusial flaps with smooth margins. (Description adapted from Brownsey & Smith-Dodsworth (2000)).

SIMILAR TAXA

As both Hymenophyllum flexuosum and H. pluviatile grow together they are most likely to be confused. Hymenophyllum flexuosum differs from H. pluviatile by having lighter green, consistently crisped and crinkly fronds, with the stipe wing prominently crinkled. Hymenophyllum australe is only superficially similar, and its easily distinguished from H. flexuosum by its dark green-black strongly deltoid fronds, less distinctly crisped stipe wing and preference for rheophytic habitats.

DISTRIBUTION

Endemic. New Zealand. North Island, South Island, Chatham Islands.

HABITAT

Locally common in coastal to montane closed forest (coastal to montane in the North and Chatham Islands, confined to the lowland in the South Island). Usually found on boulders or rocks along waterways and in deeply shaded, rubble slopes but also frequently epiphytic on the plank roots and buttresses of pukatea (Laurelia novae-zelandiae) and maire tawake (Syzygium maire) in riparian forest. In the northern part of its range it is occasionally found growing with Hymenophyllum australe.