TECT0NA, GMBLINA VILLOSA. 



113 



however would seem to have an obvious connexion with the axis, al- 

 though this is very doubtful. 



The formation of the stigma decidedly indicates a binary forma- 

 tion of carpella. 



If these 4 upper cells are 4 constantly, and the base of the ovary 

 is as constantly two celled, then the explanation is sufficiently obvious, 

 though different from that given by Lindley.* 



First, we have in the bottom from which the mere structure of an 

 ovary is deduced, the normal dicarpellary structure, and there is in 

 addition a tendency in excess toward a parietal placentation. 



The anomalous formation arises first from parietal placentae being 

 produced to the axis, and from spurious growth from the sides of 

 the ovary also meeting in the axis, by which the ovula are divided 

 into four bundles. 



Lindley's view seems to be questionable, because as in all cases the 

 styles and stigmata are more permanent than ovaries, there should be 

 as many styles, etc. as ovaries. 2nd, because according to this view 

 the placental suture of the carpella would be turned from the axis, 

 (look at Pomaceae,) although his view of Pomaceae being right would 

 indicate an additional affinity with Mespilus, etc. which it does in habit 

 and abbreviated lateral branches. 



Are all Myrtaceae dicarpellar ? 



The true nature of the case is pointed out in the instance cited by 

 Lindley of a permanent variety of apple, which has 14 cells and 14 

 styles ! With regard to Nicotiana and Nolana ; have these one or two 

 rows of carpella ? 



Tectona. 



Arbores, trunco crasso, cito ramoso, cortice albido, laevi, tenui. 

 Folia siliceo-aspera, inflorescent dichotoma. 



Calyx aestiv. valvat. cor infundibul, subregularis laciniis, 5 rotun- 

 datis, demum reflexis aestivat. laciniis super 2, omnino exterior, facies 

 barbato-villosa. 



Antherae longit dehiscent, stylus stigma simplex. 



Pubescentia stellata. 



Modo Asclepiadeae, corolla rotata. 



Gmelina Villosa. 



Lab. super, aestivat. omnino exterior fl. axi fere paralleli, pedicell 

 apice bibracteolat. 

 Cal. minim. 5 dentat. 



* Introd. Nat. Syst. p. 44. 



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