362 
L.—OSTRYOCARPUS AND A NEW ALLIED GENUS 
OSTRYODERRIS. 
S. T. Dunn. 
One of the earliest botanical collections made in Tropical West 
Africa was that conducted by Theodor Vogel during the expedition 
organised by the African Civilisation Society in 1841, and usually 
‘known as the Niger Expedition. Sierra Leone, the Niger River 
and the Island of Fernando Po were in turn visited and explored 
and in each of these places specimens were gathered of the 
remarkable leguminous shrub on which the genus Ostryocarpus was 
founded. The botanical collections and information amassed by 
Vogel were gg PT on the return of the expedition to the Director 
of Kew, iam Hooker, for description and publication and 
among the Aes botanists who eventually took part in the work 
was his son, now Sir Joseph Hooker. The leguminous plant 
referred to above thus came into the hands of that great botanist at 
the beginning of his long and distinguished career and was at once 
recognised by him as the type of a new genus allied to Lonchocarpus 
rom which it was distinguished by its diadelphous stamens an 
peculiar shell-like pod. It is from the latter characteristic that the 
name is presumably derived (dorpeov a shell). 
wo other West African shrubs possess, like it, glabrous 
exstipellate leaflets, choctatced flowers crowded on short special 
branchlets, nearly sessile broad glabrous standards, hooked wings 
and keel petals and a short 2-3-ovuled gynoecium semdaiod at the 
base by a fimbriate disk which is usually adnate to the consolidated 
base of the calyx 
a Hook. £ Niger Fl. pee 316 ; Benth. et Hook. f. 
Gen. Plant. i. 548; Baker in FI. Tro . Afr, ii. 240; Engl. et 
Prantl, Piantontaus 3, li. 343, 
TropicaL Wrst AFRICA: French Congo to Senegambia. 
ome 5 ene branchlets short, floriferous 
0 bas i igi w» O. riparius 
Leaflets “ti 
Leaflets acute, reticulate above, flowering 
branchlets bare at base O. Zenkerianus. 
Leaflets dbtaahy acuminate, smooth, lowering 
branchlets floriferous to base w. OJ lucidus. 
A Hype, Hook. f. Niger Fl. (1849) 316. 
mbing or straggling shrub with yellowish-white flowers, 
wily distributed in the coastal regions of West Tropical Africa. 
a AFRICA. Senegambia: River Nunez, Heudelot, 81%, 
Sierra Leone: Bagru River, Mann, 832, and without precise 
locality, Vogel, 59, 146. Liberia : Sinoe Basin, Whete and without 
precise iocality, ’ Dinklage, 1725. Ivory Coast, Preuss, 1166, 
Chevalier, 17,876. Cameroons, Winkler, 479. Fernando Po 
ig Bay, Vogel, 107. Spanish Gaboon : River Muni, an: 
1768. Gaboon: Como River, Bates, 4 
0. Zenkerianus, Dunn, nom. nov.; Millettta Zenkeriana, Harms in 
Engl. Jahrb. xxvi. 291. 
Tropica, Arrica. Cameroons: Sanaga, Zenker, 1453. 
