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NZ Plants

Hymenophyllum sanguinolentum - piripiri

Filmy fern family: Hymenophyllaceae

Hymenophyllum sanguinolentum is terrestrial or epiphytic filmy fern with long-creeping stems (rhizomes) bearing dark green fronds. The midrib (rachis) is seldom straight but is undulating and is sparsely hairy and narrowly-winged.
An endemic species found throughout New Zealand.

Vegetative characteristics

Fertile frond and sporangia

Plant form: creeping rhizome with fronds up to  35 cm

Frond appearance: similar to sterile frond

Frond stalk, midrib: stalk wiry, sparsely hair, with narrow wing; midrib sparsely hairy, with narrow wing.

Sporangium location: on lower terminal ends of leaflets

Frond shape: elliptic to oval

Sporangium position: leaflet margin

Frond blade: 3-4-pinnate (divided 3-4 times into leaflets or pinnae)

Sporangia distribution: in groups (sori)

Frond surface: filmy, translucent

Sorus shape: rounded

Leaflets: oblong, smooth margin

Sorus covering: indusium flaps smooth-edged, inflated, sometimes crested