___ Synopt ical and Specific Descriptions. 55 
Burtt-Davy, in his Notes on Some Transvaal Trees and Shrubs,” ' says : — “Acacia pallens, Rolfe (A nigrescens var. pallens, Benth.) The type specimens, both of A. nigrescens 
and of var. pallens , are from Zambesia, and in each case they are very incomplete. Additional material from the Transvaal enables Rolfe to separate the latter as a distinct 
species to which all our material so far collected appears to belong. I have incomplete winter specimens from Topsi, Bechuanaland, which may belong to A. nigrescens, but it 
is impossible to say definitely until foliage has been collected from the same locality. This is one of our most important timber trees, and is largely cut for mine-props under 
the name Knopjies-doorn or um-kai. 1 he prickles persist for many years on the main trunk, and branches, effectually arming the tree, though to what advantage is not evident. 
The type of ‘var .pallens is from opposite Pita, near Senna, Zambesia, April, 1S60, Kirk, 201, a tree 30 feet, very hard heavy wood, used for clubs.” I did not find this species 
in Zambesia, but may not have been far enough up-country for it, and in the thorn-veld of the south I saw only one form, except in so far as differences occur through vigorous 
or poor growth, coppice shoots, &c. 
Plate XXXIII. B. i, Branch ; 2, Pinna of Coppice shoot ; 3, Pod ; 4, Thorn ; 5, Seed. 
A. Welwitschii, Oliv. Vern. names — 3, Aapjesdoorn ; 4, Mkaia. A glabrous tree 5-10 metres high, 20-30 c.m. diameter of stem. Thorns in pairs, apparently slipular, 
always present, 1-1*5 c<m> l° n g> hooked, stout. Leaves 7-8 c.m. long; pinnte 3-4 pairs; leaflets 5-7 pairs, lax, 7 m.m. long, 4 m.m. wide, elliptical; rachis with a 
gland below the lowest pinnae. Inflorescence spicate; spike 5 c.m. long, axillary, or panicled at the end of a branch. Pod 10-12 c.m. long, 2 c.m. wide, rounded 
at the base, rounded and bluntly pointed at the apex, nearly flat, about 6-seeded, very shortly stalked. Seeds oblong, 1 c.m. long. Frequent in the thorn-veld, 
mixed with A. nigrescens, and enjoying the same native name and reputation for its timber, which also is used in mining. About Machava the tree seems more vigorous 
than further inland, and has frequently up to 7 pairs of pinnre. It is recorded from Zambesi, below Tete, but I did not find it in the lower Zambesian districts. 
Miss Gibbs, in recording it from Victoria Falls, where it is the only Acacia mentioned by her, says : - “ Large tree, with flat crown. Flowers pink, with pink 
rachis to raceme.” Although hardly in flower during my visit I believe the flowers to be yellow. 
Plate XXXVII. B. 1, Fruiting branch ; 2, Spike; 3, Tree, general aspect (much reduced). 
A. glaucophylla, Steud. Vern. name — 10, Egamosena, which name is used for several thorny Acacias. A large tree in the forests of Magenja da Costa, without 
branches below. Younger parts finely pubescent, older parts glabrous. Spines in pairs, apparently stipular, 5 m.m. long, recurved. Leaves with about 6 pairs of 
pinnje, each with about 12-16 pairs of leaflets. Leaflets about 1 c.m. long, 2 m.m. wide, very oblique at the base, and with the vein near the upper margin. 
Inflorescence spicate; spikes axillary, 4-5 c.m. long. Pods variable in outline, usually 10-12 c.m. long, 2-2-5 c.m. wide, rounded and suddenly pointed, sometimes 
more narrow or with a waved margin, about 6-seeded, flat, coriaceous, reticulated, glabrous when mature. Seeds 1 c.m. wide, nearly circular, compressed. 
Plate XL. B. 1, Fruiting branch ; 2, Pinnule, x 4. 
A. purpurea, Bolle in Peters’ Mossamb. Bot., 1, 6. Unknown to me, but described as “a small tree from Zambesia, with green-grey tomentose, or thickly pubescent 
extremities. Leaf-rachis pubescent, with concave sessile glands between the pinnae, which are in 8 pairs ; leaflets 12 jugate, very shortly petiolulate, oblong, obtuse, 
thinly pilose, 3 lines long, ij lines broad. Spikes equalling the leaves, dense, pilose. Flowers purple. Calyx hairy, with finely pointed teeth. Petals free nearly 
to the base. Legume not seen. I do not know this plant, nor have I identified it among Dr. Kirk’s collections. I)r. Bolle puts it in Mr. Bentham's section 
Vulgates- DiacanthaeP - 
A. rostrata. (New species.)* Vern. names—, 3, Aapjesdoorn ; 4, Mkaia. Usually a much-branched shrub 2-4 metres high ; occasionally a tree of considerable size. 
Two hooked thorns 5-10 m.m. long, apparently stipular, tend upward ; 1 larger thorn up to 1 "5 c.m. long, somewhat hooked, tends downward below tile bud. This 
is consequently one of the worst Acacias for detaining passengers, as upward and downward thorns both catch. Leaves 710 c.m. long ; the rachis pubescent, with 
2 or more glands toward the base; pinnae about 7 pairs ; leaflets about 14 pairs, 4-7 m.m. long, 15 m.m. wide. Inflorescence spicate. Spike 5 c.m. long. Pod 
7-10 c.m. long, 2-2*5 c.m. wide, the middle part oblong, tapering to the narrow base, and also tapering to the 1-2 c.m. beak, flat, with thin reticulated valves and 1 5 
seeds. Frequent in the thorn-veld of Lourenzo Marques and Maputa, usually in moist depressions ; when large used along with other kinds known as Mkaia and 
not distinguishable in its timber from them Sim 6263. 
Plate XXXVII. A. 1, Fruiting branch ; 2, Spike ; 3, Tree, general aspect (much reduced). 
• Kew Bulletin No. 4. 19 ° 8 , page 159- 
'Prof. Oliver in “Flora of Tropical Africa,” II., 343. 
3 Acacia rostrata. (Sp. nov.) Frutex ramosus, 2-4 m. altus, nonnunquam arbor magna, stipulis hamatis acutis, altcro 5-10 m.m. longo sursum flexo, allero majorc 1 ’5 c.m. longo deflexo aculeata ; fol 
7-10 c.m. longis; rachi pubescente glandulis 2 vel pluribus basin versus praedita ; pinnis circiler 7 -jugis, foliolis circitcr I4\j*>g' s . 4-7 m ' m - lon K is - Ialis : infloresccntia spica 5 c.m. longa ; leguminc 7- 
c.m. longo, 2-2-5 c.m. lato, piano, reticulalo, media parte oblonga, 1-5-spermo. Frequens in dumetis aculcatis, plerumquc humidis, Lourenzo Marques ct Maputa. Sim 6263. Tab. XXXVII. A. 
foliis 
10 
