Brown. — Notes on the Genus Andreaea. 277 



these latter being of the greatest importance in the determina- 

 tion of species. Following this plan, a graduated series is 

 found in the shape of the leaves, beginning with those at the 

 base and running up to the perichaetial. Thus, I do not think 

 there should be any difficulty in recognising the new species 

 here described. 



All the Andreaeas described in the Handbook are figured 

 in the "Flora Antarctica" except Andreaa petrophila, and are 

 there available for reference. To complete the series, I have 

 added drawings of A. petrophila, taken from a Swedish speci- 

 men (PI. XXXI.). The perichaetial leaves are large in all the 

 New Zealand species except A. subulata, in which they are 

 described in the Handbook as small and inconspicuous. This 

 plant I have never seen. These leaves play an important part 

 in protecting the young capsule from being destroyed by great 

 extremes of temperature. In three of the species the vaginula 

 has been found sessile and the spores appeared to have 

 matured, while on the same plants were found the remains of 

 the previous year's capsule with a stalked vaginula, showing 

 that this stalk had been subsequently developed. With re- 

 gard to distribution, some of the species are very common, 

 while others are extremely local, A. aquaticus and A. aqua- 

 tilis having been found in one locality only. 



The following arrangement of the species of this genus in 

 its enlarged state is that adopted by Sir J. D. Hooker in the 

 Handbook, and is intended to place the plants in the 

 position they relatively hold. In the present condition of the 

 genus it is perhaps the best, as it is not known how many 

 of the species are dioecious : — 



Nerveless. 

 A. acutifolia, Hook, and Wils. 

 A. gibbosa, sp. nov. 

 A. petrophila, Ehrli. 

 A. dioica, sp. nov. 

 A. minuta, sp. nov. 

 A. novas-zelandiae, sp. nov. 

 A. wrightii, sp. nov. 

 A. mutabilis, Hook. f. 

 A. flexuosa, sp. nov. 

 A. huttoni, sjj. nov . 

 A. nitida, Hook, and Wils. 

 A. aquatica, sp. nov. 



Nerved. 

 A. subulata, Harv. 

 A. dicranioides, sp. nov. 

 A. ovalifolia, sp. nov. 



