CONTRIBUTIONS TO BOTANY. 
55 
stigma becomes obsoletely lobed. It is tbe only species hitherto 
described, for the Icacina dubia of M'^Fadyen will be shown to 
be the Mappia racemosa of Jacquin. Three other species will, 
however, be added below. The generic character may be thus 
given. 
Icacina, A. Juss. — perfecti. Cahjx breviter campanulatus, 
5-dentatus, dentibus acutis, persistens. Petala^, oblonga, intus 
villosa, extus sericea, hypogyna, sestivatione valvata, sub an- 
thesi patentia, imo adhesione filamentorum in tubum brevem 
conniventia. Stamina 5, cum petalis inserta, iisdem alterna ; 
filamenta carnosula, imo dilatata, apice subulata, et breviter 
induplicata ; antherce ovatie, introrsse, 2-lob8e, 4-loculares, imo 
ad medium bifidse, connective tenui adnatse, dorso in sinu 
affixse, lobis singulatim 2-locellatis, demum septicidis et longi- 
tudinaliter evolutim* dehiscentibus. Pollen acute 3-gonum. 
Ovarium liberum, oblongum, sub-gibbum, villosum, disco 
parvo suffultum, 1-loculare ; ovula 2 juxta apicem loculi sub- 
collateraliter supei’posita, podospermio crassiusculo suspensa, 
anatropa. Stylus elongatus, subulatus, sulcatus, incurvus. 
Stigma obliquum, obsolete lobatum, lateraliter excavatum. 
Dntpa villosa, monopyrena, 1-locularis, monosperma ; cetera 
ignota. — Arbores in Africam tropicam vel in Insulas vicinas 
crescentes •, folia alterna, ovata, Integra, coriacea, petiolata, ex- 
stipulata •, inflorescentia paniculata, terminalis ; tiores parvuli, 
cum pedicellis brevibus articulati, bracteolis minimis, caducis. 
1. Icacina Senegalensis, Ad. Juss. Mem. Soc. Hist. Nat. i. 173. 
tab. 9; DC. Prodr. i. 534; Guill. Perr. Tent. FI. Seneg. i. 
105. Chrysobalanus luteus. Sab. Trans. Hort. Soc. iv. 453 ; 
— foliis ovatis basi rotundatis a medio acuminatis et apice 
obtusis, vel rotundatis et retusis, reticulatis, coriaceis, utrinque 
glaberrimis, supra sub-lucidis, subtus ferrugineis, petiolo brevi 
crassiusculo canaliculato ; floribus terminalibus, laxe panicu- 
latis, pedicellisque articulatis rufescenti-villosis ; drupa flava. 
— Senegambia; v. s. in herb. Hook. (Heudelot). 
The figure above quoted of Jussieu gives a very good repre- 
* I shall continue to use this term to prevent a repetition of the follo^yiug 
mode of dehiscence, which I find nowhere described, although it is of fre- 
quent occurrence : it differs essentially from the longitudinal or valvate 
opening of the ordinary simple cell, in the same manner that the septicidal 
dehiscence of a capsular friut does from its loculicidal mode of opening. 
The structure of its 2 lobes and their manner of dehiscence may be fm-ther 
defined — lohse introflexione marginum contiguorum singulatim parallele et 
perfecte 2-locellata:, marginibus istis primo solutis, valvuhs tunc contrarie 
evolutis; dein apparet ut si lobae ambae l-loeulatae fuerint, et per rimam 
longitudinalem dehiscerint. 
