450 ON SEEDLINGS 



and acute ; the first four are very short, and all are very 

 much narrower than the cotyledons. In H. laurina the coty- 

 ledons are obovate and considerably smaller than those of the 

 last. 



The cotyledons of H. eucalyptoides are oblong-obovate and 

 sometimes indented on the sides. The first five leaves are 

 lanceolate, the two primary ones being opposite. The coty- 

 ledons of H. florida are obovate-oblong and subfalcate owing 

 to the indentation on one side. The cotyledons of Grevillea 

 Hilliana (fig. 629) are obovate, trinerved, much larger than 

 those of Hakea laurina, but otherwise similar. In weak seed- 

 lings the second and third leaves are spathulate and trifid ; 

 but in strong seedlings the next three at least are cuneate, 

 gradually tapering to a petiole-like base and more deeply 

 trifid. The cotyledons of Stenocarpus salignus are oblong- 

 obovate, trinerved, and differ slightly from the type in having 

 shorter basal auricles which clasp the axis horizontally. The 

 first leaf is elliptic and entire. Lambertia formosa (fig. 627) 

 has obovate and emarginate as well as auricled cotyledons. 

 The cotyledons of Leucospermum conocarpum (fig. 626) are 

 also emarginate, but they are unsymmetrical especially to- 

 wards the base. They are scarcely, if at all, auricled at the 

 base, but a broad and short petiole-like piece forms a sort of 

 ligule clasping the axis in the very early stages of the seedling. 

 A third type occurs in Banksia australis (fig. 632) which has 

 oblong obliquely emarginate cotyledons, drawn out at the base 

 into narrow horizontal auricles. 



The cotyledons of Grevillea punicea differ in being longer, 

 sometimes obliquely emarginate, sessile and connate at the 

 base or perfoliate. Those of G. linearis agree with the last 

 except that they are entire. 



A number of types occur in the Order which cannot be 

 classified with any of the above. The cotyledons of Hakea 

 multilineata var. grammatophylla are obovate, retuse or trun- 

 cate at the apex, and auricled at the base. 



The cotyledons of Protea mellifera are obovate, spathulate, 

 entire, sessile, fleshy and not auricled at the base. The latter 

 character is unusual in the Order. The cotyledons of a species 

 of Koupala from Bogota are oblong-ovate, acute, trinerved at 



