490 EVOLUTION OF THE EUCALYPTS, 



0-3 cm. long, the second pair subsessile, and the following leaves 

 closely resembling those of E . umhra. 



E . Risdoni Hook. f.(Pl.lx., fig.l).— Cotyledons obtusely quadri- 

 lateral, slightly emarginate, cuneate at base, 0-4 x 0-35, petiole 

 0-3 cm. Leaves opposite, decussate, sessile, obtuse, ovate, then 

 triangular with cordate base, glabrous, entire. First pr. 1*8 x 0-9, 

 second 2*5 x 1*8, third 2 x l-2cm. Leaves and cotyledons purplish 

 beneath. First internode 1, second 1-2, third 1*3 cm. Stem 

 terete, glabrous, purplish. This seedling is strikingly dissimilar 

 to that of K. amyydalina, with which it was synonymised by 

 Mueller. The primary broad ovate then triangular leaves are 

 entirely different from those of E. amygdalina. 



E. linearis A. Cunn.(Pl. Ix., fig.5). — Cotyledons triangular, 

 slightly emarginate, cuneate at base, 0*45 x 0-45, petiole 0*4 cm. 

 long, deep purple on under side. Leaves opposite, decussate, 

 subsessile, lanceolate, obtuse. First pr. 1-5 x 0*45, second 2-5 x 0-6, 

 third 2*6 X 0-5 cm. First internode 0-5, second 1, third 1*2 cm. 

 Stem and under sides of leaves are purplish. The cotyledons of 

 this species are quite distinct from those of E. amygdalina (Tas- 

 manian form), being larger and triangular, and the emargination 

 more distinct. The primary leaves of both are much alike. 



E. phlehophylla F.v.M. (PI. Ixiv., fig.3). —Cotyledons obtusely 

 quadrilateral, slightly emarginate, 0"6 X 0*5, petiole 0-4cm. Leaves 

 opposite, lanceolate, subacute, shortly petiolate for three pairs, 

 then sessile, lateral veins oblique, glabrous. First pr. LI x 0*4, 

 sessile; second pr. 1 •3x0-5, petiole 0'3; third 1*8 x 0-8, petiole 

 0-25; fourth 2*5 x LI cm., sessile. First internode, 0*5, second 

 0-4, third 0*4, fourth 0-6 cm. Stem terete, glabrous, reddish. 



This species has been synonymised with E. coriacea, but the 

 seedlings are very distinct, the former having larger cotyledons, 

 and the primary leaves lanceolate instead of oval. The inter- 

 nodes are also shorter, the leaves being thus more crowded. I 

 must, therefore, disagree with the placing of them under the one 

 species by Mueller and Maiden. 



E. hcBmastoma Sm.(Pl.lvii., fig.3),— Cotyledons obtusely quadri- 

 lateral, slightly emarginate, glabrous, deep purple beneath, 

 0'5 X 0*3, petiole 0'5 cm. long. Leaves lanceolate, tapering at 



