198 NOTES ON COMMELINACE. 
ranks of seeds with no septum between them. I find (not rarely) 
in herbaria Aneilemas with 1-ranked seeds named Dichespermum 
by experienced botanists, I presume misled in this way. 
The seeds in all these cases have the embryostegas on their 
backs, with the embryo either transverse or opposite to the hilum ; 
e embryostega is, as regards the axis of the capsule, lateral, as it 
is in genera of Commelinacee, except one, viz., Cyanotis. The 
hila lateral as usually; but the upper seed has its embryostega 
toward apex of the stele the lower seed has its embryostega 
towards the base of the , as represented in fig. 5, which re- 
eect & Séttienl janie: netst gh the seeds of one cell of a capsule 
of Cyanotis. R. Brown fixed on ‘this as the distinguishing mark of 
the genus ; " but it seems to have been _— lost sight of since 
day; so that, while new genera have n proposed for very 
seainaer specie s of Cyanotis, even Dr. Hasskerl remains in doubt 
whether some of the Malayan Cyanotis may not be Saber 
i R ) 
species in Cyanotis, all the New World in Tradescantia, and is 
simple definite mark which divides out a large mass of apeteel 
according to their true natural affinit 
Several of the American genera of Tradescantiee are very closely 
allied; but ironema and Tinantia, which e tle from 
Peuieiush in hainokats differ considerably in habit. 6 would, 
perhaps, have been better if Callisia had never been 
generically from pperesomaig but it is an old genus aecsetel by 
Linneus and every o 
The fruit of read: rene not hitherto known, and of the 
genera Cochliostema and Pyrrheima, was obtained for me b 
E. Brown, who succeeded in artificially fertilising the — in the 
Kew Conservatories which in previous years set no frui 
4. As to the subdivision of the ee BO 
In Commelina the dorsal cell of the ovary has one ovule only, or 
is suppressed, the two ventral cells rays either two ovules each 
or one each; this character i is, as far as I know, absolute for each 
species, 7. ¢., among the species which have one ovule only in — 
ventral cell, I have never ik with a single case where two ovules 
i. Br cies. In 5 o large a genus ae ate eae 
pokiehe. A consider it convenient to establish Monoon as a 
new genus; but, though it may be distinguished from Comunatins 
by a single absolute character, the habit is identical, and the three 
sections of Commelina (Did ymoon) ge represented by three sections 
of Monoon. These sections are grounded on the Be ee tt re- 
duction of the dorsal cell of the capi ule; in the first section it 
dehisces loculicidally like the two other cells; in oe paced cpt ies 
