NOTKS AND EXHIBITS. 289 



activity. A series of branchlets have become conglomerated by 

 the action of intruding insect-larvae, the true leaves (which are 

 degenerate, and represented by minute teeth), normally in regular 

 whorls, have been thrown into confusion, their bases becoming 

 swollen and dilated. The branchlets not subjected to the attack 

 exhibit attenuation. — Nakea pugioniformisCsiV.,{A. A. Hamilton; 

 Maroubra Bay; August, 1914), showing leaf -variation, resultant 

 from environment. Example (1), with short, crowded leaves (1 

 to above 2 cm. long) was found growing in a shallow basin, with- 

 out drainage, (on a bench of otherwise bare rock) containing a 

 small quantity of soil and debris. Example (2), with longer and 

 more distant leaves (from above 1 to 5 cm.), was growing on the 

 slope of the hill, with good drainage but insufficient moisture. 

 Example (3), with comparatively luxuriant foliage (3 to above 

 8 cm.), grew in fairly deep soil, well drained, and adjacent to a 

 watercourse. Examples of this species from Is'ewnes Junction 

 (A. A. Hamilton; September, 1914) were also exhibited, showing 

 the similarity of the xeropbytic effect on the habit and foliage, 

 brought about by the apparently dissimilar environments of the 

 dry ridge and the swamp. — llelichrysum se77iipapposum DC, (A. 

 A. Hamilton; Blackheath; November, 1914), showing alteration 

 of a xerophytic adaptation. An old bush of this species was 

 noted, surrounded by a colony of younger ones, evidently its 

 progeny. The leaves and branches of the young bushes were 

 heavily clothed with a woolly vestiture Ca common device to 

 reduce transpiration). The parent-bush had discarded, for the 

 greater part, the woolly coat, and had adopted instead a measure 

 of viscidity as a protective agency. — Xylomelum pyriforme 8m., 

 (A. A. Hamilton; Cook's River; August, 1914), showing leaf- 

 variation. The juvenile leaves are falcate, lanceolate, oblong, 

 elliptical, to almost rhomboidal; their apices acute, acuminate, 

 apiculate, obtuse, truncate, to emarginate; and their margins 

 from finely to coarsely toothed, or lobed. The adult leaves 

 exhibit little variation in shape, and have the usual entire (or 

 nearly entire) margins. — Myi'sine variabilis R.Br., (A. A. Ham- 

 ilton; Cook's River; July, 1914). Apart from the well known 

 distinction between the juvenile and adult leaves (the former 



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