250 Materials for a Flora of the Malayan Peninsnla. 



having no bloom on the young branches, and particularly in having the large 

 petiolar gland very near the base of the petiole ; the corresponding gland in 

 A. pminescens is about an inch above the base. The two species A. pseudo-Intsia 

 and A. prinuescens taken together form a group that is almost exactly intermediate 

 between the A. Intsia and the A. pennata groups, 



3. Acacia pennata Willd. ; Bak. in Flor. Brit,. Ind. II, 297. A 

 large scandent bush or strong creeper, sometimes extending for 50-60 

 feet, branches and branchlets armed witii many small sharp slightly- 

 recurved glossy brown or blackish prickles, young twigs faintly pubescent 

 or glabrous. Leaves 2-pinnate ; the rachis 6 in. long, glabrous or 

 puberulous, prickly beneath or unarmed, petiolar portion '75-1 in. long 

 with a projecting large or small gland •4-"5 in. above the base ; pinnae 

 20-40 pairs, ]'25-2 in. long, the upper pairs with glands between their 

 bases ; leaflets 35-40 pairs, sessile, linear, •2-35 in. long, under '05 in. 

 wide, firm, glabrous. Flowers in rounded heads "2 in. in diam., white or 

 pale-yellow, peduncles '5-7 in. long, slender, puberulous, naked, in 

 clusters of from 4-8 along a panicle extending 12-15 in. beyond the 

 leaves ; bracts small linear, '1 in. long. Calyx glabrous, '05 in. long, 

 cainpanulate. Corolla '07 in. long. Fod linear-oblong, acute or acumi- 

 nate at both ends, 4-6 in. long, '75-1 in. wide, flat, very thin, with a 

 stalk under '2 in. long, the sutures slightly thickened. Seeds flat, ovate, 

 •4 in. long, '2 in. wide, under "1 in. thick, faintly areolate, dull-brown, 

 smooth. 



Var, arrophtda Bak. in Flor. Brit. Ind. Ind. II. 298 ; leaf-rachis 

 almost glabrous, prickly beneath, peduncles 4-6-nate ; petiolar gland 

 large, inter- pinnular glands 2-3. A. arrophula Don. Prodr. Flor. Nep. 

 247? 



An damans ; very common. Distrib. India, Indo-China. 



Var. pluricapitata Bak. in Flor. Brit. Ind, II, 298 ; leaf-rachis 

 puberulous, not prickly, peduncles 6-8-nate ; petiolar gland small, inter- 

 pinnular glands 10-12. A . pluricapitata Steud. Nomencl. ed. II, I, 7; 

 Benth. Hook. Lond. Journ. I, 516; Fl. Jungh. I, 267. A. polycephala 

 Grab, in Wall. Cat. 5255 not of DC. 



Penang; Porter (Wall. Cat. 5255)! Malacca; Griffi,th ! Maingay 

 585 ! Ferry 166 ! Holmberg 838 ! llervey ! Perak ; Scortechini ! Kunstler 

 482 ! 3332 ! 4876 ! 5504 ! 10300 ! Distrib. Malay Archipelago. 



Following the Mora of British India these two very distinct plants are here 

 treated as varieties of Acacia pennata. That A. pluricapitata is deserving of 

 specific rank seems almost certain, and it is probably equally certain that the plant 

 here termed var. arrophula should also be separated specifically from A pennata. 

 The point can only be satisfactorily settled in a monographic revision of the Indian 

 Acacias ; pending the preparation of such a revision it seems better to deal with the 

 forms as they have been dealt with by Mr. Baker. The true A . pennata of Will- 

 denow is unknown from our area. 



250 



