XLIIl] 



ARAUCARINEAE 



145 



bear a close superficial resemblance to Cedar cones but the latter are 

 relatively narrow and often more or less flattened at the apex 1 . Bommer 2 

 calls attention to the resemblance of Agathis cones to those of the Dicotyledon 

 Dammaropsis kingiana (Moraceae). 



Araucaria. (Frontispiece; figs. 678 681, 689, etc.) The falcate tetra- 

 gonal leaves of A. excelsa illustrate one type of leaf that is seen in its smallest 

 form in A. Balansae (4 5 x 2-5 mm.). In A. Bidwillii (fig. 697) the leaves 

 are subsessile and the flat lamina may reach a length of 7 cm. : in A. Housteinii 



FIG. 697. Araucaria Bidwillii. ( After Seward and Ford ; nat. size.) 



the ovate-lanceolate leaves may be 10 cm. by 1 cm. Dimorphism 3 in the foliage 

 of a single shoot is not uncommon. The striking difference in some species 

 between the juvenile and adult foliage is illustrated in fig. 698. In the broad- 

 leaved species (Colymbea section) resin-canals occur between the veins (fig. 694, 

 C) and in the Eutacta section, e.g., A. excelsa, the canals are scattered. Strobili 

 and cone-scales of Araucaria are described in an earlier part of this chapter 

 (see page 113). 





Fliche (96). 



2 Bommer (03) B. PL x. figs. 164, 165. 

 3 Masters (91); Bommer (03) B. PL v. fig. 23; Siebold (70) PL CXL. 



s. IV 



10 



