t 
564 APPENDIX. [ Botany of Terra Australis, 
related to Rubiacese and Gentianeas ; the former appearing to differ chiefly 
in its remarkable stipulne, the latter in its minute Embryo. If these charac- 
ters be admitted, certain New Holland genera which I have placed with 
Gentianeaj will either be transferred to Rubiacese, or, as 1 have formerly 
proposed,* may with some others, constitute a family intermediate to 
Rubiacea; and Apocinese. 
This order or section, which may be named Logane,®, will consist 
ofLogania, Geniostoma, (from which Anasser of Jussieu is not distinct), 
Usteria, Gaertnera of Lamarck F, Pagameaof Anblet, and, perhaps, Fagraea. 
Of these, the only New Holland genus is Logania, the greater part of 
whose species are found in the principal parallel. In this genus, winch 
admits, however, of subdivision, the importance of stipulation seems to be 
entirely lost, for it contains species agreeing in this respect with Rubi- 
aceae, 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 Gentianeae. 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 Apocineas of New Holland, which are chiefly found 
within the tropic, the most remarkable genus is Alyxia, in which the albu- 
men and embryo agree with those of the very different family Annonacea;. 
ASCLEPlADEiE.X These plants differ from Apocinese, solely 
in the peculiar structure of their genitalia, a character, however, which 
appears to me, fully sufficient to justify their separation. They are not 
very numerous in New Holland, where they are found chiefly within the 
tropic, and I have not observed any plant of the order in that country in a 
higher latitude than 34° S. 
EP AC RIDE E. || The abundance of this family in Terra Australis 
* Prodr. ji. nov. holt. 455. f IUustr. gen. tab. 167. 
t IVerner. soc. transact. 1. p. 12. prodr. fl. nov. boll. 458. 
|| Prodr. jl, nov. holt. 535. Ericearum genera. Juss. gen. 160. 
