80 BLAKE: NEOMILLSPAUGHIA 
Oaxaca, May 14, 1906, and of P. guatemalensis, collected by Pope- 
noe, enable me to give its characters. 
The seed of Podopterus mexicanus is trigonous, either equal- 
sided or conforming to the shape of the achene (trigonous, with 
one side flat and two narrower and sulcate), and acute at apex. 
The plentiful albumen is farinaceous, slightly ruminate, and 
gives the starch reaction with iodine. The embryo is subcentral 
and straight, either flat or bent longitudinally in a boat-shaped 
fashion, when one half lies parallel to the flat side of the seed and 
the other enters the central lobe. The cotyledons are flat, or 
bent as described, and the radicle superior, slender, more than 
half as long as the thin oval cotyledons, ascending from their 
slightly cordate base. In young ovaries the ovule is erect and 
stipitate, as described by Baillon, not subsessile as described by 
Bentham and Hooker. In P. cordifolius the ovule is pendulous 
on a basal funicle longer than itself in the young flower. Older 
flowers of this species have not been examined. 
In mature achenes of Podopterus guatemalensis the seed is 
trigonous, rounded on each side or with two sides slightly sulcate. 
The embryo is subcentral, in cross-section somewhat boat-shaped 
or bent in an irregular S-form. The oval cotyledons are unequal 
at base, oblique on one side and on the other cordate and accum- 
bent to the base of the ascending radicle. 
In 1901* Rolfe described and figured a new genus Gymopodium 
from British Honduras, said to be related to Podopterus but to be 
distinguished by its wingless pedicels and its nine stamens. 
Comparison with the description and specimens of the genus Mills- 
paughia described several years Iater by Robinsonf from Yucatan 
shows that the two genera are identical. The genus is not closely 
allied to Podopterus, however, as Rolfe considered it, probably 
on the basis of the tribal grouping in the Genera Plantarum, but 
is a near relative of Antigonon Endl., with which it was associated 
by Robinson. 
Antigonon is ‘placed by Bentham and Hooker in the tribe 
Coccolobeae, which is separated from the tribe Triplarideae, in 
which Podopierus is placed, chiefly by its five-parted perianth 
* Hook. Icon. 27: pl. 2690. 1901. : Pee 
{ Bot. Jahrb. 36 (Beibl. 80): 13. 1905. 
