BY A. A. HAMILTON. 169 



ness, and density of wool; and presents (16; p.34), under Piloism, 

 instances in Compositse, and other families, of an increased 

 vestiture assumed by plants on the higher elevations, growing 

 under xerophytic conditions. Plants of Helipterum incanum 

 DC.., growing in the Hartley Valley, near the banks of the Lett, 

 show alterations in the leaves from short and broad, to narrow- 

 linear, yellow, white, and variegated flowers being found among 

 this series. Examples of this species in the National Herbarium, 

 from Mt. Kosciusko (Coll. J. H. Maiden), have basal, obovate- 

 spathulate leaves, i inch long; and there are examples from 

 various localities with elongated, thread-like leaves reaching 4 • 

 inches in length. The adaptability of the weedy Helichrysum 

 apiculatum DC, has given rise to a large series of forms, only 

 equalled, perhaps, by the ubiquitous " Cudweed," Gnaphalium 

 iaponicum Thunb. 



GoODENIACEiE. 



Specimens of Scaet^ola suai^eolens R.Br., and S. microcarpa 

 Cav., were noted (13; 1914, p.397), exemplifying an insuflicient 

 range of herbarium-material, or field-experience, necessary for a 

 reliable description, one of the characters depended upon to 

 separate these two species (size of leaf) being shown to be inac- 

 curately applied. A difference in size and texture is here noted, 

 characterising the leaves of old and young plants of Goodenia 

 ovata Sm., from Stan well Park (A. A. Hamilton; August, 1915). 

 G. heterophyUa Sm., and G. hederacea Sm., can, with difficulty, 

 be separated on the leaf-characters. 



EPACRIDEiE. 



The sheathing-leaves of Sprengelia ponceletia F.v.M., are 

 similar to those of the short-leaved forms of S. incarnata Sm., 

 the latter showing a considerable range in length of leaf. The 

 genus Leucopogon has several species which cannot be separated 

 on leaf-characters. Acrotriche divaricata R.Br., and .4. aggregata 

 R.Br., are inconstant in the leaf-characters separating them, 

 viz., hirsuteness, and shade of colour on the underside of the 

 leaves (4; iv., p.226). Of Epacris crassifolia R.Br., it is noted 



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