342 XLVII. § MIMOSEH (OLIVER). { Acacia. 
linear-oblong, apiculate or pointed, margins continuous, 2-valved, 5—6- 
seeded, valves thin but firmly coriaceous, glabrous or pulverulent, 
obscurely reticulate, 3-5 in. long, 3-? in. broad. 
Lower Guinea. On the Zenza, B do Bengo, Loanda and Ambriz, Angola, Dr. 
Welwitsch ! 
Mozamb. Distr. Zambesi, below Tette, Dr. Kirk! 
8. A. Verek, Guill. et Perr, Fl. Seneg. i, 245, t.56. Branches pale, 
glabrous or glabrescent. Infra-stipular prickles geminate or ternate, 
short, polished, recurved. Leaves in our specimens not exceeding 
1-14 in., rachis pubescent with a gland between the upper pinne and 
one near the base; pinne in 8~5 pairs, leaflets in 10-15 pairs, linear- 
oblong, scarcely acute, 2 lines long more or less. Spikes exceeding 
the leaves, shortly pedunculate, axillary, solitary, or 2 or 3 together, 
2-3 in. long. Flowers sessile, glabrous or glabrate, rather lax. Calyx 
cupuliform, toothed to the middle. Petals free or irregularly cohering, 
rather longer than the calyx. Legume oblong, straight, flat, margin 
continuous or slightly sinuous, owing to occasional abortion of seeds, 
obtuse or mucronate, narrowed at base, 38-4 in. long, 3-1 in. broad, 
valves thinly coriaceous, obsoletely puberulous, obscurely reticulate. 
‘Seeds subrotundate, much compressed, as long as broad or sometimes 
broader than long.’’ Schweinf. Acacien-arten d. Nilgebiets, 374, t. 22a. ; 
Reliq. Kotschyane, t. 3. 
Upper Guinea. Senegambia, Heudelot! Brunner! Bidjem! 
Wile Land. Southern Nubia, Dr. Schweinfurth. Kordotan, Cienkowsky. 
Guillemin and Perrottet reduce here Mimosa senegalensis, Lam. This species 
affords, according to these botanists, an important part of the Gum Arabic of commerce, 
and according to Dr. Schweinfurth (Relig. Kotschyane, 4), the best white gum of the 
Nile region. Upon the gums of Senegal, see a Memoir by Dr. Fliickiger in Schweiz. 
Wochenschrift Pharm. 1869, with a figure of A. Verek. 
Allied to A. Verek is a plant in flower only, with but a single developed leaf, in Dr. 
Welwitsch’s herbarium from Mossamedes. “The calyx and petals are externally mi- 
nutely sericeous (“ lepidote-sericeus,” Welw.). The petals are free from the base, 
about twice as long as the calyx; the ovary glabrous on a stipes of its own length. 
Flowers precocious. 
9. A. glaucophylla, Steud.; A. Rich. Fl. Abyss. i. 248. Tree or 
large shrub, wholly glabrous or extremities puberulous; branches 
brown or reddish-brown to grey. Infra-stipular prickles geminate or 
ternate, short, straight or slightly recurved, frequently wanting. 
Leat-rachis from 15-3} in., minutely pubescent or glabrous, wea 
with a small gland near the base; pinne 3—6-jugate, leaflets in 12-20 
pairs, oblong or oval-oblong, obtuse, 3-5 lines long. Inflorescence and 
flowers as in A, Verek, the spikes usually shorter than the leaves. 
Ovary glabrous. Legume linear, straight, flat, apiculate or acuminate, 
narrowed at base, 3-4} in. long, $3 in. broad, valves thinly coriaceous, 
glabrous, finely rhc mab reticulate, slightly convex over each 
seed. ‘‘ Seeds oval, longer than broad” (Schweinfurth).—A. triacantha, 
Hochst.; A. Rich. lc. 244; Schweinf. Acacien-arten d. Nilgebiets, 
372, t. 22 b. 
