BOTANY OF TERRA AUSTUALIS. 37 



APOCINE^E.^ T have already observed^ tliat this order 

 is very nearly i'elated to Rubiacese and Gentianese ; the pe* 

 former appearing to differ cliiefly in its remarkable stipulse, 

 the latter in its minute embryo. If these characters be 

 admitted, certain New Holland genera which I have placed 

 with Gentianese will either be transferred to Rubiacese, or, 

 as I have formerly proposed,' may, with some others, con- 

 stitute a family intermediate to Rubiacese and Apocinese. 



This order or section, which may be named LoganejE, 

 will consist of Logania, Geniostoma (from which Anasser 

 of Jussieu is not distinct), listeria, Gsertnera of Lamarck,* 

 Pagamea of Aublet, and, perhaps, Fagrsea. Of these, the 

 only New Holland genus is Logania, the greater part of 

 whose species are found in the principal parallel. In this 

 genus, which admits, however, of siibdivision, the import- 

 ance of stipulation seems to be entirely lost, for it contains 

 species agreeing in this respect with Rubiacese, others in 

 which the stipulae are lateral and distinct, and one species, 

 at least, in which they are entirely wanting. 



There is an evident affinity between certain species of 

 Logania and Mitrasacme, which I had therefore placed in 

 Gentianese. Mitrasacme is very general in Terra Australis, 

 but its maximum is within the tropic ; it is not absolutely 

 confined to New Holland, for I have observed in the Sher- 

 ardian Herbarium two species collected at Cheusan, by Mr. 

 Cunningham. 



Among the true Apocinese of New Holland, which are 

 chiefly found within the tropic, the most remarkable genus 

 is Alyxia, in which the albumen and embryo agree with 

 those of the very different family Annonacese. 



ASCLEPIADEtE.^ These plants differ from Apocinese 

 solely in the peculiar structure of their genitalia, a charac- 

 ter, however, which appears to me fully sufficient to justify 

 their separation. They are not very numerous in New 



1 Prodr.fl. Nov. Holl. 465. Apocinearum pars, Juss. gen. 143. 

 ^ Werner, soc. transact. 1, ^. 12. 



' Prodr.fl. Nov. Holl. 455. ^ llluslr. gen. tab. 167. 



^ Werner, soc. transact. \,p. 12; Prodr.fl. Nov. Soil. 458. 



