New Zealand Native Orchids

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Pterostylis alveata

Greenhood

Stokes Valley 19 February 2006. Photo: Jeremy R. Rolfe
Photo: Jeremy R. Rolfe
Recorded distribution
Recorded distribution

Plant

Biennial, forming extensive colonies of small flowers. First year leaves quite round, 10-20mm broad. Second year flowering stems with erect bract-like leaves.

Flowers

Small, 10-15 mm across, Sinus of lateral sepals thickened, protruding like a jug spout. Petals broad, rounded at the tip, the hood of dorsal sepal and petals creating a narrow gap with the sepals can completely obscure the erect, dark brown, straight tipped, obtuse labellum.

Flowering

February - May.

Habitat

Lowland poor soils in hard beech, manuka and gorse. Wellington to Nelson, local, rare.

Conservation

A few sites known around Nelson, Marlborough and Wellington. A new coloniser from Australia where it is rare.

Notes

Very distinctive flower. Unusually small scattered populations.

Key features

Small flower and large rounded first year leaves, thickened, jutting junction to sepals, broad petals.

Photos

Stokes Valley 19 February 2006. Photo: Jeremy R. Rolfe
Stokes Valley 20 February 2006. Photo: Jeremy R. Rolfe
North-West Nelson. Photo: Gael Donaghy
Hutt Valley. Photo: Jeremy Rolfe
Photo: Eric Scanlen
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Greenhood orchids (Pterostylis)
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