448 LVII. MELASTOMACEiE (HOOKER). [DlSSOtis. 



1. 0. (Heterotis) segregata, Benth. in Fl. Nigr. 350. Erect or 

 suberect, shrubby below, strigose with short appressed bristles. 

 Branches obtusely 4-gonous, copiously strigillose, nodes with long 

 bristles. Leaves 2-4 in. by 1-1 J in., elliptic-ovate or ovate-lanceolate, 

 acuminate, base acute or rounded, 3-5-nerved, rather copiously stri- 

 gose on both surfaces ; petiole J-J in. Flowers 2 in. diameter, purple, 

 1-3 at the tips of the branches, shortly peduncled or subsessile, 

 not in a head, each involucrate ; outer bracts 2, narrow, small, foliace- 

 ous ; inner 4, opposite, scarious, closely sheathing the calyx, obovate, 

 truncate, glabrous, ciliate, smooth. Calyx ovoid, J in., bristly at the 

 very base only ; tube terete, smooth ; mouth contracted ; lobes half as 

 long as the tube, lanceolate, ciliate, persistent. Petals broadly ob- 

 ovate. Anthers of long stamens nearly J in. Capsule glabrous, bristly 

 at the tip only, 5-Valved throughout its length. 



Upper Guinea. Nun river, Vogel! Confluence of Niger, Ansell! Edges of 

 swamps, Nupe, Barter! 



In one specimen I find 8 stamens, with the connectives of the anthers all shortly 

 produced, showing a transition to Tristemma. 



2. D. (Heterotis) petiolata, Hook. f. Branches rather stout, 

 erect, smooth, or with a very few short raised points, obscurely 4- 

 gonous ; nodes with 2-3 appressed bristles or 0. Leaves 4-6 in. by 

 2-2-J in., elliptic, subacute at both ends, 5-nerved, green and sparsely 

 subscabrid, strigillose on both surfaces, most so above, paler below, 

 with less distinct bristles ; petiole J-1J in. Flowers solitary or 2-nate 

 at the ends of the branches, sessile ; outer bracts leafy, inner narrower, 

 also green. Calyx-tube J in., quite smooth, glabrous, with a few 

 bristles at the very base ; lobes quarter the length of the tube, tri- 

 angular-ovate, acuminate, obscurely ciliate, persistent. Anthers of 

 long stamens J in., incurved, connective as long as the cells, stout ; 

 anthers of short stamens as long, with a very shortly produced connec- 

 tive. Capsule much shorter than the calyx-tube, 5-valved at the top 

 with a minute apical ring of bristles. — Tristemma, sp., Thomson in ap- 

 pendix to Speke, Nile Journ. 635. 



Nile Land. Madi, Speke and Grant I Fl. Dec. 



Very similar to D. capitata ; but leaves long-petioled, not at all ovate, with longer 

 hairs on both surfaces, and very short calyx-lobes. 



3. D. (Heterotis) coraifolia, BenthAnFl. Nigr. 351. Subglabrous. 

 Branches rather slender, obtusely 4-gonous, with long straight bristles at 

 the joints and very few elsewhere. Leaves 3-4 in. by f-l£ in., ovate- 

 lanceolate, acute or acuminate, base acute or rounded, rigidly coriace- 

 ous, 5-nerved, both surfaces sparsely covered with very closely ap- 

 pressed bristles, those on the upper surface rough and partially im- 

 mersed in the epidermis ; petiole \-\ in. Heads sessile, few-flowered ; 

 outer bracts foliaceous, inner f in., scarious, obovate, with a ciliate 

 keel. Calyx-tube \ in., with a broad belt of bristles round the middle, 

 sometimes reduced to a few bristles ; lobes ovate-lanceolate, nearly as 



