98 C. HALL. 



THE SEEDLINGS OP THE ANGOPHORAS WITH 

 DESCRIPTION OP A NEW SPECIES. 



By Cuthbert Hall, m.d., ch.ui. 



(Communicated by R. T. Baker, f.l.s.) 



With Plates II -IV. 



[Read before the Royal Society of N. S. Wales, August 6, 1913 ] 



Lubbock in his work " On Seedlings " has described the 

 seedlings of ten of the Eucalypts, and one Tristania, viz.: — 

 T. conferta, but makes no mention of the Angophora seed- 

 lings, and it is to remedy this omission that this study was 

 begun. An investigation of the seedlings, not merely 

 increases our knowledge of plants, but it puts in our hands 

 frequently a means of differentiating species and varieties 

 that is likely to be of very great value. This is afforded 

 both by the information gained from the form of the 

 cotyledon leaves, and also that of the primary or juvenile 

 leaves, which so frequently differ from those of the mature 

 plant. 



The seedlings of the Angophoras bear a striking resem- 

 blance to those of the lower species of the Eucalypts, viz., 

 the "Blood woods," such as E. calophylla, eximia, corym- 

 bosa, etc., a fact which bears out the resemblance in respect 

 of the venation of the leaves and chemical constitution of 

 the trees generally, noted by Messrs. Baker and Smith. 



Cotyledons. — These are all of large dimensions and 

 foliaceous, A. cordifolla and A. lanceolaba being much 

 larger than those of the other species. The cotyledons of 

 A. cordifolia are orbicular while those of the others are 

 more or less reniform. They are all cordate at base, 

 glabrous and petiolate. The convex margin is always 



