153 
Oxymitra, Hook. f. § Thoms. Fl. Ind. vol. i. p- 145 (1855); 
Benth. & Hook. f. Gen. Pl. vol. i. p- 26; King in Ann. Bot. 
Gard. Calcutta, vol. iv. part 1, p. 128. Polyalthia, sect. 
Oxymitra, Blume, Fl. Jav. Anonac. p. 71 (1828). Unona, Engl. 
& Diels in Engl. Monogr. Afr. Pfl. vol. vi. p. 39, excl. citationi- 
bus genericis, descriptione et U. Stuhlmannii; non Linn. f. 
0 Orymitra we refer four cut of the five African species in- 
cluded by Engler and Diels in Unona, in addition to three which 
they placed in Cleistopholis (C. albida, C. gracilipes and U. 
platypetala). 
As Safford has pointed out,* Unona, Linn. f., is a hie of 
Aylopia; and the Asiatic species hitherto included under Unona 
are referable to Desmos, Lour., and Dasymaschalon, Dalle Torre 
& Harms. 
Engler and Diels, l.c., stated that the sole difference between 
Popowia (sensu latiore) and “ Unona”?’ [=Desmos] is that the 
inner petals are erect and connivent in the former, spreading in 
the latter; but four of the five species include y them in 
“Unona’’ have connivent petals, and should therefore, on their 
own showing, be placed in Popowia. 
opowra, however, has the inner petals free from one anothert 
and often slightly imbricate,} whereas the species under con- 
sideration have valvate inner petals connate above into a cone 
and separated below by subtriangular window-like spaces through 
which the stamens may be seen. A corolla of this kind is charac- 
teristic of Goniothalamus and Oxymitra. These two genera are 
80 closely allied that it is difficult to find technical characters to 
Separate them. According to King, the inner petals are clawed 
in Goniothalamus, not clawed in Oxymitra, and the lateral nerves 
k ‘ . . 
O. albida, O. longipedicellata and O. gracilipes have distinct 
0. velutina, which have relatively narrow, long, accuminate 
siner petals, and sausage-shaped, 1-seeded (rarely 2-seeded) 
fruits. The African species referred by us to Oxymttra are the 
following perce : 
l. O. albida. 
Unona albida, Engl. in Notizbl. Bot. Gart. 
+ Bull. Torr. Bot, Club, 1912, vol. xxxix. p. 504. 
t King in Ann. Bot. Gard. Calcutta, vol. iv. part 1, p. 116. 
§ Engl. Monogr. Afr. Pfl. vol vi. p. 5. 
Only known in O. longipedicellata. 
