Feb. 16, 1914 
Citropsis, an African Genus Allied to Citrus 
4 2 5 
near the original type locality on Elephanten See. These specimens show 
flowers and young fruits. Finally, there is one sheet in the Dahlem 
Herbarium, collected by Biisgen (No. 37) on November 18, 1905, also at 
Johann Albrechtshohe near Elephanten See. This specimen shows young 
fruits. 
All of this material comes from the same general locality, Johann 
Albrechtshohe being only 3 or 4 km. distant from Barombi Station. All 
eight of these specimens show a great resemblance and undoubtedly 
belong to a single species. Unfortunately all were collected in the autumn 
and show only flowers and very young fruits. 
A number of other specimens have been referred to Citropsis Preussii 
in the Dahlem Herbarium, but some of them certainly do not belong here, 
and for the present the only material certainly referable to this species is 
that collected in the immediate vicinity of Elephanten See in Kamerun. 
The excellent specimens with flowers and 
young fruit and numerous leaves permit a 
very good idea to be gained of this species. 
The leaves are 3- to 5-foliate, with broadly 
winged petiole and rachis. (See fig. 3.) 
The leaflets are very large, 100 to 160 by 
45 to 115 mm., broadly oval or oblong, 
abruptly narrowed above into a short ob¬ 
tuse tip, and broadly cuneate at the base, 
with very short petiolules. Petioles usually 
69 to 80 by 25 to 35 mm., elongate, ellipti¬ 
cal, rather acute at tip and base, but some¬ 
times shorter and broader or even obcordate 
30 to 40 by 25 mm. The segments of the 
rachis are elongate elliptical, 50 to 70 by 
15 to 25 mm. Spines usually single, 16 to 28 mm. long, rarely wanting. 
Flowers 15 to 18 mm. long in the bud, 20 to 25 mm. in diameter when 
open, in dense many-flowered clusters borne in the axils of the leaves, 
very short pediceled (3 to 5 mm.), usually 4-merous, ovaries 12 to 15 mm. 
long, with a long, slender style broadening at the base and merging 
gradually into the ovary. Only young fruits are known as yet. These 
are short-stalked or nearly sessile, slightly apiculate. 
Citropsis Preussii is readily distinguished from its congeners by the 
broadly oval or oblong leaflets, and by the short-stalked flowers with 
very long styles broadened at the base and not sharply delimited from 
the tip of the pointed ovaries. Citropsis mirabilis resembles this species 
in the shape of the leaves, winged petioles, and rachis, but differs in the 
longer stalked flowers, which have a shorter more slender style which is 
not broadened at the base and consequently is more sharply delimited 
from the tip of the more rounded ovary. (See fig. 4.) 
Fig. 4. —Pistils of four species of Citrop¬ 
sis. A y Citropsis Preussii (Standt 
No. 747); B t Citropsis m irabilis (Cheva¬ 
lier No. 21609); C t Citropsis Schwein- 
furthii (C. P. B. 2902); and D, Citrop¬ 
sis gabonmsis (Klaine No. 2260). 
Twice natural size. 
