496 FLORA NIGRITIANA, 
both of them Nubian and Abyssinian species, are also quoted 
from Senegal. Vogel has also in his collection a specimen of 
Mirabilis Jalapa, Linn., from Sierra Leone, but probably from 
some garden there. 
LXXXIX. Potyconacraz.* 
1. Polygonum Senegalense, Meisn. Monogr. Polyg. p. 54.— 
St. Thomas, Don; Senegal. 
This species has, at first sight, much the appearance of the 
Asiatic P. glabrum and the American P. acuminatum, but the 
cotyledons are certainly incumbent, not accumbent, besides 
some slight differences in other points. The leaves are remark- 
able for their very long points. The ochrez have occasionally a 
few very small cili: on their edge. 
The only other West Tropical African Polygonaceous plant 
known, is the Polygonum exiguum, Meisn., from Senegal. 
XC. TuvwELEX. 
Dicranoxeris, Planch. (gen. nov.) 
Flores hermaphroditi. Perianthium hypocrateriforme, tubo 
longo, limbo 5-partito, laciniis oblongis, sestivatione imbri- 
catis. Squame 5, petaliformes, fauci insertz, laciniis pe- 
rianthii opposite, profunde bifidee. Stamina 10, fauci inserta, 
5 longiora, squamis opposita; filamenta brevia, filiformia; 
anthere lineari-oblongze, basifixz, loculis connectivo admatis, 
rima introrsa dehiscentibus. Discus cupuliformi-tubulosus 
ovarii stipitem includens, apice leviter 5-lobus. Ovarium 
* In this and several of the following Orders, which the Prodromus 
has not yet reached, and which have not been the subject of any recent 
monograph, the geographical indications are necessarily very imperfect 
and I have been obliged to leave many more species either doubtful or 
in genera to which they may not properly belong ; neither time nor 
space admitting of the monographical labour which has been bestowed 
on the preceding Orders by the authors of the corresponding portions of 
the Prodromus. 
