482 EVOLUTION OF THE EUCALYPTS, 



E. trachyphloia F.v.M. (PI. xxxviii., fig.3). — Cotyledons reni- 

 form, entire, glabrous, 0-7 x 0-45, petiole 0-3 cm. Leaves oval 

 then lanceolate, opposite, soon alternate and vertical, obtuse, 

 entire, petiolate. Stem and leaves covered with glandular, 

 stellate hairs. Stem erect, terete, green. The cotyledons are 

 smaller than in E. corymbosa, corresponding with the smaller 

 fruit. This is interesting, as the species occurs at Narrabri, 

 where the climate is very hot, and much drier than on the coast. 

 This reduction is to meet the hot, drier climate. The first leaves, 

 too, are smaller, first pr. being 0'7 x 0*4, petiole 0-3; second pr. 

 0-9 X 0-6, petiole 0-3; third pr. 1 x 0'4, petiole 0-4; fourth pr. 

 ] -5 X 0-9, petiole 6 cm. Peltate leaves not seen so far as grown. 



E. intermedia R. T. Baker (PI. xxxviii., fig.2). - Hypocotyl 

 terete, glabrous, 0*6 cm. Cotyledons reniform, lighter green on 

 under surface, very slightly emarginate, 1 x 0-6, petiole 0-4 cm. 

 Leaves entire, opposite, soon alternate, lanceolate, obtuse, taper- 

 ing to petiole, lighter colour on under surface. First pr. 1*2 x 0*6, 

 petiole 0-2; second 1-5 x 0*8, petiole 0-4; third 3x1, petiole 0*4 

 cm. Stem and leaves covered with glandular hairs ; peltate 

 leaves not observed. Mr. Baker rightly separated this species 

 from E. eximia and E. corymbosa. It differs in one very import- 

 ant matter in that, in many cotyledons, there is slight but distinct 

 emargination. These are also smaller. The leaves, too, are dis- 

 tinct. The lateral veins are transverse, and the intramarginal 

 vein close to the edge. 



E. per/oliata R.Br. (PI. xxxix., figs.2-3). - Seed, supplied by Mr. 

 J. Staer, gave seedlings of two kinds. In one, the cotyledons 

 were larger, 1-5 x 0-9, petiole 5 cm., reniform, entire, glabrous, 

 dark green. Leaves oval, obtuse, opposite. In the other, coty- 

 ledons not so broad, 1-3 x 0-9, petiole 0*3 cm., laminae purplish on 

 under surface. Leaves ovate, not so obtuse. In both cases, 

 leaves shortly petiolate, and they and stem covered with glandular 

 hairs. 



E. citriodora Hook. (PL Ixv., fig.l; Pl.lxix., fig.2). -Hypocotyl 

 glabrous, terete, 0-9cm. long. Cotyledons orbicular-reniform, almost 

 sessile, entire, sometimes with apical tooth, glabrous, 0*7 cm. in 

 diameter. Leaves ovate, then lanceolate and peltate, obtuse, 



