Pretrea] xciii. rEDALiACE.i:. 801 



0. PRETREA J. Gay; Beiitli. 6c ]Iook. f. Gen. PI. ii. j.. 1059. 



1. P. zanguebarica J. Gay in Ann. Sc. Nat. ser. 1, i. p. 457 (1824). 

 Marli/iua zaiKji'e/xu'ia Lour. Fl. Cocliinch. p. 38G (1790). 



P. arte mis kc/olia Klotzscli in Peters, ]\Iossamb. Bot. i. p. 188. 

 t. 31 (1861). 



Island of Zan/.ii'.ak. — An infusion of the plant is mucilaginous 

 and used as remedy in cases of gonorrhoea. Probably the " Biri-viri " 

 of the Zanzibar people. Collected by Roquett in 18(')2 and sent to 

 Welwitsch 10 Jan. 180:5 by Dr. Hopffer ; in 11. and fr. No. 1656, 

 and Coi.L. Caup. 825. 



The three species of this genus which were mentioned by Klotzsch, 

 l.<\, are prol)ably all forms of the same species ; see a letter on this 

 subject by Welwitsch in the (ju-^ctn Medicn de Linbua, p. 474 C1863). 



7. LINARIOPSIS Wohv. in Trans. Linn. Soc. xsvii. p. 53 

 (1869) ; Benth. ct Ifook. f. Gen. PI. ii. p. 1060. 



1. L. prostrataWc'Iw.,Z.c.,p.54; Fiealho,Pl. Uteis, p. 240 (1884). 



Hiii.i.A. — A perennial herb : root thick, fleshy-fibrous, conical- 

 cylindrical ; stems several, prostrate, compressed, dilated at the nodes, 

 sparingly branched ; branches opposite, ascending, glandular and 

 hirsute throughout with whitish hyaline sometimes laxer sometimes 

 denser unequal hairs ; leaves herbaceous-green, ciliate and with thinly 

 scattered hyaline hairs above, branny-lepidote and whitish beneath ; 

 petioles with one or more glands ; llowers axillary, purple-dusky, 

 pruinose ; calyx .""i-partite to the base ; the segments linear-lanceolate, 

 rather obtuse, ciliate, one of them shorter than the rest : corolla 

 tubular, the throat widened and gibbous, the limb bilabiate, the upper 

 lobes straight, the middle lobe of the lower lip wider concave and 

 boat-shaped, all the lobes rounded-obtuse ; stamens 4, didynamous, 

 included, ascending, inserted a little above the base of the corolla-tube 

 where there is a ring of glandular hairs ; anthers broadly obovate, 

 cordate at the base, 2-celled : the cells separated by the connective, 

 •diverging, longitudinally dehiscing ; ovary 2-celled ; cells 1 -ovulate ; 

 ovules ersct or ascending ; capsule woody (except the persistent calyx 

 and disk), obovoid-cylindrical, short, obtuse, 4-ribbed, tuberculate in 

 rows between the ribs, scarcely dehiscent, obtusely mucronate at the 

 top with the remains of the style, incompletely 2-celled, the cells 

 confluent above the middle, that is, the septum not reaching the centre, 

 and thus 1-celled ; endopleura thinly membranous, hyaline : seeds 

 erect, obcordate, truncate at the base, compressed, towards the base 

 with two short wings by the folding of the chestnut-brown mem- 

 branous rather loose testa; embryo straight; cotyledons obovate, 

 obtuse and somewhat emarginate at the apex, rather tleshy, flattened ; 

 radicle inferior, broadly conical, obtuse, r ither short. In hilly places 

 in short grass by streams between Mumpulla and Xenc, at an elevation 

 of from 4500 to 50()0 ft.; also near Lopollo, but there not very 

 plentiful ; il. and fr. Oct. 1859. No. 1659. 



XCIV. ACJANTHACEiE. 

 1. THUNBERGIA L. f.; Benth. A Hook. f. Gen. PI. ii. p. 1072. 

 1. T. affinis S. :\Ioore in Journ. Bot. 1880, pp. 5 (Jan.), 194, 

 196 (July); Burkill in Fl. Trop. Afr. v. p. 11 (1899). 

 GoLUNtiO Alto. — A shrub, climbing high and wide, remarkably 



52 



