498 EVOLUTION OF THE EUCALYPTS, 



opposite, entire, glabrous, lanceolate, then ovate, obtuse, petiolate, 

 venation parallel, oblique. First pair of leaves 1 x 0-25, petiole 

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

 First internode 0*7, second 0*6, third 1-2, fourth 2-2 cm. Stem 

 terete, glabrous. 



E. crebra F.v M. (PI. Ixi., fig.l). Cotyledons like those of E. 

 paniculata and emarginate. Leaves opposite but soon alternate, 

 lanceolate, petiolate, subacute then obtuse, glabrous. First pr. 

 1 xO-15, petiole 0-4; second 1-8 x 0-6, petiole 06; third 3-2 x 0-9, 

 petiole 0-6 cm. First internode 0*7, second 1-4, third 2*5 cm. 

 Stem terete, glabrous. 



E . siderophloia Benth. (PL Ixi., fig.3) — Cotyledons larger than 

 in the other "Ironbarks," 0*6 x 0-3, petiole 0-2 cm., emarginate. 

 Leaves opposite, entire, glabrous, lanceolate then ovate, obtuse, 

 petiolate, venation oblique. First pr. 1 xO*3, petiole 0-3; second 

 1*7 xl, petiole 0-4; third 3*6 x 1*7, petiole 0-4 cm. First inter- 

 node 1, second 1, third 1*4, fourth 1*8 cm. Stem terete, glabrous. 



E. melanophloia F.v.M. (PI. Ixi., fig. 2).— Cotyledons 0-5 x 0-3, 

 petiole 0-25, slightly emarginate, asymmetrical. Leaves lanceo- 

 late, obtuse, opposite, entire, glabrous, shortly petiolate. First 

 pr. liXO-3, petiole 0-15; second 1*5 xO-45, petiole 0-25; third 

 1-8 X 0-55, petiole 0-3 cm. First internode 1, second 1, third 1*4, 

 fourth 1 -8 cm. Stem terete, glabrous. 



E. sideroxylon A. Cunn. (PI. xlviii., fig.5).— Cotyledons 0-4 x 

 0-25, petiole 0*25 cm., slightly emarginate. Leaves lanceolate, 

 then ovate-lanceolate, obtuse, glabrous, entire, petiolate. First 

 pr. 08 X 0-3, petiole 0-2; second 1-3 x 0*6, petioleO-5; third 1-9x1, 

 petiole 0-5 cm. First internode 0-8, second 0-6, third 1-2 cm. 

 Stem terete, glabrous. The seedlings of the " Ironbarks " bear 

 a general family resemblance to one another. The cotyledons 

 are all fairly small and oblong, and slightly emarginate. The 

 leaves are petiolate, those of E . melanophloia having the shortest 

 petioles; those of E. crebra and E. sideroxylon are lanceolate, 

 while those of E. siderophloia and E. panicidata are ovate. 



E. hemiphloia F.v.M. (P\.\vi., fig.D). — Cotyledons obreniform, 

 petiolate, slightly emarginate, 0*5 x 0-3, petiole 0*4 cm. Leaves 

 lanceolate then ovate, subacute, entire, opposite, glabrous. First 



