126 PLANTS OF NEW ZEALAND 



Genus Pterostylis. 



Slender, leafy, shining herbs, with tuberous roots, and solitary green 

 flowers. Leaves radical or cauline. Column broadly winged. Pollen-masses 

 4. A genus confined to Australia, Tasmania, and New Zealand. (Name 

 from the Greek, signifying a winged column] . 11 sp. 



Fig. 35. Corysanthes macrantha ( nat. size). 



Pterostylis Banksii (Banks' Pterostylis). 



A talh, slender herb, with numerous alternate leaves, and solitary, hood- 

 shaped green flowers, striped with white. Stem 6in.-18in. high ; flower 2in. -Sin. 

 long. P. graminea is very similar to P. Banksii. Both islands. Fl. Oct. -Jan. 



Genus Thelymitra. 



Erect, tuberous-rooted herbs. Leaves 1 or 2, narrow, with a membranous 

 sheath below. Flowers in a short spike, blue, purple, or yellow. Column hooded. 

 Pollen masses 4. A large genus, found only in Australia, Tasmania, New 

 Zealand, and the mountains of Java. (Name from the Greek, in allusion to the 

 hooded column capping the anther). 8 sp. 



