61 



Varietas silvicultrix. 



Chatham-Island, ia woods only. 



The characters of this variety consist in broader and shorter 

 leaves, which are verging from broad-ovate into lanceolate, only 

 1-2^" long, but §-1" broad and acute but not acuminate, in propor- 

 tionately broader sepals, of which the inner are lanceolate and simply 

 acute, whilst the outer are hardly or little longer than these and 

 never so much protracted into a narrow acumen as those of the 

 typical form of Pterostylis Banksii. The author however has been 

 tinable to detect any important structural differences between these 

 plants and has therefore not ventured to separate them as species, 

 although middle-forms are missing in the collection. New Zealand 

 specimens of P. Banksii prove that plant subject to considerable 

 changes in its external form. 



Chilogiottis Thaversii. 

 Caladenia bifolia, J. Hook. Fl. Nov. Zeel. i. 247. 



Leaves subsessUe, lanceolate or ovate-lanceolate, as well as the 

 scape bract and pedicel short- and glandular-downy ; sepals con- 

 spersed with glands ; upper one broad-cymbiform, simply acute ; 

 lower ones linear-lanceolate, almost of equal form with the lateral 

 somewhat smaller sepals ; labellum only along the mid-Une and 

 below the middle glandular, sessile, obovate, blunt, not decidedly 

 appendiculate ; column near the almost lobeless summit somewhat 

 dilated. 



Amongst ferns as well in Pitt-Island as in Chatham-Island. 



Leaves 1-2" long. Scape measuring 3-5". Pedicel during an- 

 thesis about half exserted beyond the clasping bract. Upper sepal 

 and the two lower sHghtly longer than the lip ; the latter about 4'" 

 long ; its glands bi seriate, not very large, increasing downward in 

 size. 



The only New Zealand specimen, which the author had an op- 

 portunity of dissecting, and which was collected in the Province of 

 Canterbury, showed no differences in the organization of its flowers 

 from those of the Chatham-plant, but its leaves are broad-ovate. 



Dr. Hooker (Flor. Tasm. ii. 23) alludes to the exclusive existence 

 of a Chiloglottis in Lord Auckland's Group and Campbell-Island, 

 but not to the New Zealand plant, as a Caladenia doubtfully com- 

 bined with an Auckland species in his Flora Nov. Zeel. 



Chiloglottis Gunnii (Lindl. Gen. et Spec. Orchid. 387 ; J. Hook. 

 Fl. Tasm. ii. 23, t. 108 B.) occurs on the mossy stems of fern-trees 



