Tctractomia.] xxxiu. RUTACE^E. (J. D. Hooker.) 401 



Disk broad, glandular, flattish or pulvinate, obtusely 4-angled. Sfamens 8, 

 4 perfect alternate with the petals, 4 smaller with imperfect anthers (or 0) 

 opposite the petals and partially adnate to them at the base ; filaments 

 subulate, flattened at the base; anthers 2-lobed, dorsifixed. Ovary 

 immersed in the centre of the disk, 4-celled, with 4 free projecting lobes ; 

 styles 4, free at the base, connate above, stigma capitate obscurely 4-lobed ; 

 ovules 2, collateral in each cell. Fruit of 4 coriaceous laterally compressed 

 oblong 2-seeded carpels, splitting ventrally, the horny endocarp partially 

 separating. /Seeds inserted towards the base of the carpels (nucleus small 

 with a large oblong obtuse membranous wing, embryo unknown). DISTRIB. 

 Three species, natives of the Malayan Peninsula and Borneo. 



A very singular genus, which I find in no Indian Herbarium hut Maingay's, who 

 gathered both species in 1867-8, and describes If. majus in his Mss. as a Diosmea, 

 no doubt because of the staminodes, and the leaves as alternate, in which he is cer- 

 tainly mistaken. One of these two is, however, the Melicope tetrandra of Roxburgh, 

 from Penang. It is nearly allied to Evodia, differing in the staminodes, valvate petals 

 and seeds. A third species (H. Beccarii, Hook, f.) from Borneo was discovered by Dr. 

 Beccari at Sarawak (No. 1880), it has obovate leaves and small trichotomous glabrous 

 cymes. I have described the seeds as I found them in H. majus (which are imper- 

 fect), but Roxburgh describes them in his Melicope tetrandra as oblong and immersed 

 in a yellow fleshy aril. I have no seeds of this species, but the structure of the capsule 

 is precisely as in H. majus. 



1. T. majus, Hook. /. ; leaflets 8 in. obovate rounded at the tip, cymes 

 glabrous or nearly so. 



MALACCA, Maingay (Kew distrib. 290). 



A tree ; branchlets stout, woody, as thick as the finger, covered with rough brown 

 bark. Leaves apparently crowded on the branchlets ; petiole 2-2^ in., stout, terete, 

 slightly swollen at the base and apex ; leaflets very coriaceous, quite entire, narrowed 

 at the base, pale when dry with obscure darker spots, nerves numerous slender spread- 

 ing, smooth above, beneath with minute prominent gland-dots crowned with micros- 

 copic hairs ; nervules reticulate, obscure, most viable on the upper surface (Maingay}. 

 Cymes 4-6 in. diam., opposite, glabrous or minutely pubescent, branches stout spread- 

 ing alternate, branchlets opposite ; bracts minute, persistent. Flowers \ in. diam., 

 pedicelled, ebracteolate, glabrous. Filaments exceeding the petals and style. Ripe 

 carpels unequally J in. long, obtusely keeled at the back. Seeds nearly as long as 

 the carpel ; nucleus basal, oblique, very much smaller than the oblong wing. 



2. T. Roxburgh!!, Hook. f. ; leaflets 3-5 in. elliptic or cuneate-obovate 

 obtusely acuminate, cymes pubescent. Melicope tetrandra, Roxb. Fl. 

 Ind. ii. 257. 



PENANG, Roxh. ; SINGAPORE, Maingay (Kew distrib. 278, 2). 



Differs from H. majus conspicuously in size, the branchlets not being thicker than a 

 goose-quill, and the flowers | in. diam., and ripe carpels $ in. long. In texture and 

 nervation the leaflets are identical ; the cymes of this are laxly clothed with a lurfura- 

 ceous pubescence. 



7. BIELICOFE, Forst. 



Shrubs. Leaves opposite (in the Indian species) 1-3-foliolate. pellucid- 

 punctate. Flowers small, in axillary cymes or panicles. Calyx 4-lobed or 

 4-partite. Petals 4, sessile, spreading, valvate or imbricate. Disk- large, 

 entire or 8-lobed or obsolete. Stamens 8, inserted at the base of the disk, 

 those opposite the petals shorter, filaments subulate or flattened ; anthers 

 oblong or cordate. Ovary 4-celled, deeply 4-lobed ; style basilar or styles 4, 

 subteraiinal, more or less combined, stigma capitate 4-lobed; ovules 2 in each 



