40 LXX. RUBIACEZ (HIERN). [ Adina. 
1. A. microcephala, Hiern. A shrub with quite glabrous branches. 
Leaves lanceolate, whorled in fours, 4-6 by 1-1} in., gradually 
narrowed into the petiole, glossy when young; stipules interpetiolar 
separating in a ring with 4 teeth. Common peduncle rather slender, 
longer than the petioles, axillary, bracteate in the middle ; bract 
caducous, of 2-4 connate parts. Flowers 1;—} in. long, sessile; re- 
ceptacle hairy; palee spathulate, hairy. Calyx 5-fid. Corolla 
pubescent, 5-lobed; limb 7}, in. diam. Stamens 5. Stigma glabrous, 
globose.—Nauclea microcephala, Del. Cent. Pl. Mér. p. 67, n. o4 
(1826); DC. Prodr. iv. p. 345; Schweinf. Beitr. Fl. Athiop. p. 138, 
n. 709 (1867). 
Wile Land. Sennaar, at Singue, Cailliaud ; Fesoghlu, Cienkowsky. 
3. MITRAGYNE, Korth. Obs. Naucl. Ind. p. 19 (1839), non Br. 
(Stephegyne, Korth. ; Benth et Hook. f. Gen. Pl. ii. p. 31.) 
Flowers crowded in compact globose heads with paleaceous bracteoles 
at the base. Calyx-tubes contiguous, obconical, with a short free 
glabrous rim, tyuncate or obscurely 5-toothed, without appendages. 
Corolla narrowly funnel-shaped, 5-lobed, valvate in estivation. 
Stamens 5, glabrous inserted at or near the mouth of the corolla; 
filaments short; anthers lanceolate-oblong. Disk annular. Ovary 
2-celled ; style filiform, exserted ; stigma oblong or subcapitate ; ovules 
numerous. Fruit di-coccous. Seeds numerous, small, winged at both 
ends.—Trees or shrubs with subterete or obtusely quadrangular 
branchlets, opposite subcoriaceous leaves, interpetiolar fugacious 
stipules, and solitary or cymose heads of white or yellow flowers. 
A small genus found also in Tropical Asia. 
Flowering heads solitary. Corolla glabrous outside, bearded 
at the throat. Anthers included, erect . . . . . . . 1. M. africana, 
Flowering heads cymose. Corolla-limb hairy outside, glabrous 
at the throat, anthers exserted, drooping. . . . . . 2. M. macrophylla. 
1. M. africana, Korth. Obs. Naucl. Ind. p. 19 (1839). Rang- 
ing in size from a bush of 6 ft. to a tree of 20-40 ft. Glabrous 
or somewhat pubescent. Leaves ovate-elliptical, obtusely acuminate 
or narrowed at the apex, rounded or excavated or obtusely wedge 
shaped at the base, with 6-7 glabrous or sparingly pubescent veins on 
each side of the midrib, 2-4 by 3-2 in., on petiole of }—4 in.; stipules 
lanceolate-oblong or ovate, obtuse sheathing coloured 3-1 in. long 
fugacious. Flowering heads solitary, subsessile or pedunculate, about 
1 in, diam. Corolla white, turning yellow, fragrant, glabrous 
outside, throat bearded, -about 4 in. long; lobes obtuse. Anthers 
just exserted, drooping. Stigma red.—Uncaria inermis, Willd. in 
Usteri Delect. ii. p. 199, t. 3 (1793). Nauelea africana, Willd. Sp. Pl. 
i. p. 929 (1797) ; DC. Prodr. iv. p. 345, (1830) ; non Cham. et Schlecht. 
in Linnaea iv. p. 148 (1829) nec Walp. N. platanocarpa, Planch. 
(Platanocarpum africanum Hook. f.) in Hook. Ic. t. 787. Stephegyné 
africana, Walp. Repert. ii. p. 518. Benth. in Hook. Niger FI. p. 380, t. 37. 
Cepha'anthus africanus, Reichenb. in Sieber Pl. exs, Seneg. n. 20! 
Upper Guinea. Guinea, Thonning, Isert ; Sierra Leone, 4fzelius / Don! 
