38 APPENDIX. 



I ► 



ments, having an imbricated sestivation^ with the same peculiar 

 involution of the margins^ as in the Duboisiecs. Like Antho" 

 troche it has didynamous stamens^ with similarly formed anthers, 

 only that they are introrse : it has also a bilocular ovarium^ but 

 each cell has only a solitary suspended ovule ; its fruit is also 

 drupaceous and bilocular ; of its embryo nothing is known : 

 should it even have a superior radicle^ as is most probable^ its 

 ordinal tendency would even then appear to lean more towards 



Nesog 



Myoporacece. The same may 



structure. The chief distinction between the Scrophulariacece 



embry 



Myopora 



value, as it arises merely from the more pendent or ascending 

 position of the ovules^ and in both cases the radicle points alike 

 to the hilum. We must remember that exceptional cases of this 

 kind occur in ScrophuJariace£e, for instance in Leptorhabdos, 

 Melampyrum and Tozzia^ which also have only two suspended 

 ovules, where sometimes only a single seed becomes perfected, 

 and where from its pendulous position the radicle is superior, 

 contrai-y to the usual character of the family. Under such views, 

 the ordinal tendencies of Leptorhabdos and Disoon appear to 

 point in the same direction, from which the baccate fruit of the 

 latter would not exclude it, because, although a rare occurrence 

 in Scrophulariacecey this does sometimes occur, as in Halleria, 

 &c. : in Airopacecs it is more frequent. Consequently it would 

 be more consistent to refer to Scrop/iulariacecB all the genera of 

 the Myoporace<2 possessing a bilocular ovarium, where the ovules 

 are attached to a simple dissepiment, and to confine the limits of 

 the Myoporacem to those genera where the dissepiment is so 

 greatly produced and introflexed as to produce four distinct 

 cells, and often other pseudo-cells. The latter, according to the 

 views of most botanists, offer a structure closely approaching 

 that of the VerbenacecB and Borraginacem (the Echial alliance of 

 Prof. Lindley) : the former clearly belong to one of the orders 

 of the great Solanal alliance as above suggested : the distinction 

 in point of structure is considerable and manifest. In habit, 

 Disoon and Nesogenes are said scarcely to resemble Myoporaceous 

 plants. Many points of analogy between these genera and Scle- 

 Tophjlax are deserving of attention. The genus last mentioned 

 has a tubular corolla, the segments of which have an involuted 

 aestivation, as in Disoon ; five stamens, one of which is smaller; a 

 superior bilocular ovarium, with a single suspended ovule in each 

 cell; the fruit is an indehiscent 2-celIed carcerule, enclosed in 

 the augmented calyx^ with a single suspended seed in each cell, 

 the somewhat terete embryo being enclosed in albumen with a 



