504 SAFFORD: SO-CALLED UNONAS OF THE OLD WORLD 
with these indications to determine the identity of the type. It is 
either Xylopia frutescens Aubl. or X. salicifolia Dunal, more likely 
the former, both of which are commonly called peyrico, pegriko, 
or pegreko-boom in Surinam and are undoubtedly congeneric 
with Xylopia muricata, the type of the genus Xylopia as estab- 
lished by Linnaeus.* 
This being the case, the genus Unona falls, becoming a synonym 
of the genus Xylopia, and it is necessary to designate by a valid 
name the Asiatic genus which Hooker and Thomson called Unona. 
The earliest name for this genus is that of Loureiro:} Desmos, 
signifying a chain, and given to it on account of the fruits chained 
together in nodes. Two species were described by Loureiro, 
Desmos cochinchinensis, the type of the genus, which Dunal after- 
wards renamed Unona Desmos, and Desmos chinensis, which Vahl 
described the following year under the name Unona discolor. 
If we recognize the validity of Loureiro’s genus but widen his 
definition so as to comprehend in it the species of Hooker and 
Thomson’s genus Unona,{ certain changes in nomenclature become 
necessary. The following is a description of the genus. 
DESMOS Loureiro 
Sepals 3. Petals 6, in 2 series, valvate, nearly equal, flat, 
some cases 3, from the suppression of the inner series. Stamens 
numerous, tetragonal-oblong or cuneate, the connective 
above the dorsal oblong or linear-oblong pollen sacs in nee 
globose or truncate hoodlike process. Torus slightly 1aye" 
n 
truncate, flat, or somewhat concave at the apex, glabrous betwee ; 
Carpels indefinite; 
* Syst. Nat. 2: 1250. toed. 1759. 
{ Flora Cochinchinensis 1: 352. 1790. 
t From this genus I have found it necessary to remove 
Thoms. (= U. Brandesana Pierre), owing to the peculiar form of the 
of its stamens, which like that of the genus Canangium is produc 
point and not swollen and obtuse or flattened as in Desmos. 
doubtedly congeneric with Canangium odoratum (Lamb.) King. 
llows: 
Unona latifolia Hook. f. & 
connective 
This plant oy 
Its synonymy is as 
Canangium Brandesanum (Pierre) Safford comb. nov. 
Unona Brandesana Pierre, Fl. Forest. Cochinch. pl. 19. 18803 Monosgt 
Hook. f. & Thoms. Fl. Brit. Ind. 1: 60. 1872, not Unona latifolia Dunal, yc. f. & 
Anon. 115. 1817, which is Uvaria latifolia Blume (Melodorum latifolium eis 
Thoms. Fl. Ind. 116. 1855) 
Unona latifolia 
