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AX T ATOMY, AND LIFE-HISTORY OF THE CONIFERS. 



235 







find seedlings with more than two; but when the number is 

 increased, much irregularity as to number prevails. Duchartre*, 

 adopting the opinion of Adanson t and of A. L. de Jussieu J, in 

 opposition to the views of Graertner §, Salisbury ||, and L. C. 

 Richard % considered that the multiplicity of cotyledons was 

 more apparent than real, and might be traced to the subdivision 

 of two. If, however, the vascular bundles be traced from the 

 caulicle, it will be seen that the vascul ar cylinder breaks up, not 

 first into two divisions which subsequently branch, but into a 

 variable number, not always in direct relation to the number 

 of the cotyledons. 







The following genera and subgenera are known to have two or 

 more cotyledons. Those genera to which the sign ! is appended 

 have been examined by myself. 



Embryo dicotyledonous. 



Tribe Cupressinece. 

 Callitris !, Prenela !, Actinostrobus, Fitzroya, Libocedrus, Thuya !, 

 Cupressus ! (including C. Lawsouiana !), Juniperus !, Retino- 

 spora ! ~ 



Tribe Tarqdiete. 



Cryptojneria !, Taxodium ?, Athrotaxis !, Sciadopitys !. 



Tribe Tavern. 



Taxus !, Torreya !, Ginkgo !, Cephalotaxus !, Phyllocladus !, Daer 

 dium !, Pherosphsera. 

 Tribe Podocarpea. 



Microeachrys, Saxe-Gothaea, Podocarpus ! 

 Tribe Araucariete. ~~ 



Cunninghauria, Agathis !, Araucaria ! ^ 





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Embryo polycotyledonous. 



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Tribe Cupressinea. 



Callitris spp. !, Cupressus spp. !, Juniperus sp| 

 Tribe Tazodiea. 



Sequoia, Cryptomeria (subiude) ! 

 Tribe Araucariea . 



Araucaria spp. ! 



Duchartre in Ann. 8c Nat. ser. 3 (1848), x. p. 207. 

 t Adanson, ' Families/ p. 305, " le pin n'a rfellement que deux cotyledons." 



I A. L. de Jussieu, ' Gen. Plant/ ed. 2, Pwrf. p. xviii, & p. 415. 

 Gaertner, ■ De Fruct. et Sem/ p. 157 (1788). 



II Salisbury in Trans. Linn. Soc. viii. (1807), p. 311. 

 1 Richard, Comm. Bot. de Oonif. (1826). 



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