332 TRANSACTIONS AND PROCEEDINGS 01' THE [Skhs. Lxvii. 



sub-alpine levels on the western flanks of the Alps, in 

 the Yarra and Talbot valleys, to 3000 ft. 



Casuaeine.^^. — Two of the she-oaks, Casnarina suberosa 

 and C. didyla, are found at altitudes of 3000 to 4000 ft., 

 principally as low shrubs. 



Sapindace/E. — Only one genus, with three species, 

 Dodonma viscosa, D. iirocumbens, and D. horonicefolia, a&cend 

 to alpine areas, 4000 to 5000 ft. 



Stackhousie^. — All the species of the genus Stack- 

 housia reach alpine habitats, S. linarifolia to 4600 ft., 

 ^S*. viminca to 5000 ft., and S. pulvinaris, in the higher 

 summits, 5000 to 7000 ft. 



Poutulace.e. — Two of the species of the genus C'lai/- 

 tonia ascend to the higher levels, C. ^;?/^???ogft to 5000 ft., 

 and C. avsfo'alasica, between 6000 and 7000 ft. 



Caiiyophylle.e is well represented by three genera at 

 the higher altitudes, Sfellaria, by >S'. multifora, to 4000 i't., 

 >S'. pnngens to 5400 ft., >S^. flaccida to 6000 ft.; by Sagina 

 povcuudmis up to 5000 ft., and the endemic Colobanthus 

 Bcnthamianus at 0000 to 7000 ft.; Sderanthus, by >S', 

 hifioriis up to 6000 ft.; and the alpine species, S. mniaruides 

 between 5000 and 7000 ft. 



Polygonace.e. — Several genera are represented by 

 species at the lower sub-alpine levels up to 3000 ft., but 

 only one, Muehlenheckia j^chjgonoides, ascends to 4000 ft. 



Leguminos.-E. — 22 Genera. 76 SjJecies. — At the sub- 

 alpine habitats, the well-known Acacias are in greatest 

 profusion, comprising, among others, the interesting shrubs 

 A. vomer if or mis, A. myrtifolia, A. siculiformis, the first 

 two being more abundant on the open, heathy, stony 

 northern areas, and the latter on the sands and gravels 

 of the different streams. The arboreous species, A. 

 decurrens, A. melanoxylon, A. 2^<'»ninrrvis, and others, 

 are distributed in open forest lands throughout the 

 area, nowhere gregariously unless in the heads of the 

 gullies with southern aspect. I have noticed that the 

 general form of the species A. decurrens and A. melano- 

 xylon, when occurring on the stony northern slopes, is 

 essentially different from that which they assume in the 



