219 FLORA NIGRITIANA. 
Coast Castle, making in all eleven species of this or elosely allied 
genera. The difficulty, however, of ascertaining even the 
generic characters is very great, without the presence of very 
good specimens, both of the flower and fruit; the relation 
between the carpological and floral characters not having yet 
been sufficiently made out by the monographists who have 
studied the 4nonacea.* 
Another West African genus of Anonacee, Hexalobus, A.D.C. 
including two species, completes the Order as existing on that 
coast, which thus enumerates upwards of twenty native species, 
' a very large proportion for a Flora so little known, and so 
defective in number of species. In the predominance of 
Anonacee, this Flora resembles that of the islands of the Indian 
Archipelago, to which the whole coast is related more markedly 
in its botany, than to the continent of America. 
IV. MENISPERMACEZ.T 
Gen. Nov. JarEonutizA —Fl. dioici.— Masc. Sepala 6, ovata, 
biseriata, exteriora paulo minora, sestivatione imbricata. Petala 
G, ovata, sepalis breviora, apice truncata, lateribus introflexis 
stamina tegentibus. Stamina 6, petalis opposita: filamenta 
crassa, apice arcte refracta, et in connectivum amplum car- 
* The zstivation of the corolla especially has been little attended to, 
and is likely to afford valuable auxiliary characters. In most genero, 
works, as in Endlicher’s “ Genera” and Lindley’s “ Vegetable Kingdom, 
the petals are said to be valvate in each series; and although, in the ers 
recent work on the subject, Martius and Endlicher's ** Flora Brasiliensis, 
the imbricate zestivation of the petals of Duguetia is noticed, yet even !n 
that work the valvate zstivation is included, as well in the ordinal cha- 
racter, as in the generic character of Guatteria ; whereas in most, if not 
all species of true Guatferie, Uvarie, Unone, and some others, the petals 
will be found more or less to overlay each other in the bud, as readily 
indicated by the rounded form of their apex. In Anona, and all others where 
they are truly valvate, that arrangement naturally occasions them to 
terminate in a point, at least in the young state.—(G. B.) i 
+ The MS. of this order has been entirely drawn up by Mr. Miers 
from whose able pen we may shortly hope for a complete monograph, 
where the species, here only alluded to, will be fully described. 
