Pterostylis agathicola
Usually found growing near kauri trees.
Flowers September - November in the Kaimais.
Pterostylis banksii
One of the large green-hooded orchids - 20-30 cm tall.
Common throughout the country. Found alongside tracks where the bush is more open, flowering in spring. Insect pollinated.
Pterostylis trullifolia
A smaller green-hooded orchid, with different foliage at its base - the leaves are small and heart-shaped, growing in a rosette.
Flowers mid-late winter.
Note that the flower has a "jug-spout" look to it where the two lateral sepals meet. Also note that the basal leaves are "embossed".
Pterostylis cardiostigma
It is quite distinctive with its upright stance.
The name means heart-shaped stigma, which you will find if you carefully examine the inside of the flower.
Spring-flowering.
The ones I have found have been in more open areas eg. at the edge of the bush.
Pterostylis oliveri
Found in the northern half of the South Island in sub-alpine open scrub and low bush. This photo was taken at Arthur's Pass.
Pterostylis montana
This specimen was found alongside an exposed track.
There seems to be many forms of this species, and sometimes plants are described as Pterostylis aff. montana agg. (Note: agg. = aggregate, aff. = affinity to)
Pterostylis patens
Found in montane to sub-alpine forests and scrub.
Pterostylis tristis
Found in open grassland, where the turf is short. Flowers October to January.
These are very small plants and because of their coloration, can be very difficult to spot.
Pterostylis irsoniana
The flowers and leaves are often reddish, with the dorsal sepal being strongly striped. The labellum has a curled tip with a callus on the end.
Pterostylis graminea
This species has a tall flowering stem with narrow shiny dark green leaves.
Found in light forest and scrub. Flowers Sept-Oct.
