Preirea] xciii. pedaliace^. 801 



6. PRETREA J. Gay; Benth. & Hook. f. Gen. PI. ii. p. 1059. 

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

 Martynia zangueharia Lour. Fl. Cocliinch. p. 386 (1790). 



P. artemisicefolia Klotzsch in Peters, Mossamb. Bot. i. p. 188. 

 t. 31 (1861). 



Island of Zanzibar. — 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 1 862 and sent to 

 Welwitsch 10 Jan. 1803 by Dr. Hopffer ; in fl. and fr. No. 1656, 

 and Coll. Cakp. 825. 



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

 i.e., are proljably all forms of the same species ; see a letter on this 

 subject by Welwitsch in the Gazeta Medica de Lisloa, p. 474 (1863). 



7. IINARIOPSIS Welw. in Trans. Linn. Soc. xxvii. p. 53 

 <1869) ; Benth. & Hook. f. Gen. PI. ii. p. 1060. 



1. L. prostrata Welw.,/.c.,p. 54; Ficalho,Pl. Uteis, p. 240 (1884). 



HuiLLA. — 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 ; flowers axillary, purple-dusky, 

 pruinose ; calyx 5-partite to the base ; the segments linear-lanceolate, 

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

 tabular, 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 eract 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 fleshy, flattened ; 

 radicle inferior, broadly conical, obtuse, rather short. In hilly places 

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

 of from 4500 to 5000 ft.; also near Lopollo, but there not very 

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



XCIV. ACANTHACE^. 



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



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

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



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



52 



