* * * * * GERANIACEAE. Tribe PELARGONIEAE. PELARGONIUM, _L’Herit._; _Benth. et Hook. f. Gen. Plant._ vol. i. p. 273. * * * * * =Pelargonium pulverulentum=, _Colv. in Sw. Ger._ t. 218; _Fl. Cap._ vol. i. p. 272. * * * * * THIS species of _Pelargonium_, according to the late Dr. J. Medley Wood, was first found in Natal in 1878, and was not met with again until 1914, when it was found on the south coast near the sea. It had previously been recorded from the eastern districts of the Cape Province by Ecklon and Zeyher, Drège and Burke. The species belongs to the section _Polyactium_ of the genus, and should be compared with _Pelargonium crassicaule_, which we figured on Plate 52. The white powdery pubescence, mentioned by Sweet as covering the young leaves, has not been noticed in the Natal plants. Our illustration was made and the description drawn up from specimens collected at Merebank, Natal. DESCRIPTION:--_Stem_ short, thick, woody. _Leaves_ petioled; petioles 3·1 to 7·5 cm. long, hispid; lamina 6·5 to 8·1 cm. long and broad, cordate, obtuse, somewhat lobed, with the lobes rounded and irregularly and sharply serrate, 5-veined at the base, glabrous above, hispid with minute short hairs beneath, more thickly on the margins; stipules broadly ovate, acute, ciliate. _Inflorescence_ an umbel of 6 to 12 flowers. _Peduncle_ up to 20 cm. long, hispid. _Bracts_ 3 to 4·5 cm. long, oblong, acute, hispid, ciliate. _Sepals_ 5, oblong-lanceolate, acute, densely and minutely hispid, shorter than the petals. _Petals_ 5, rather unequal, 1 to 1·2 cm. long, obovate, yellowish-white with a purple blotch. _Stamens_ 10, monadelphous, unequal; 6 stamens fertile; the remainder without anthers, of these 3 are short and subulate and 1 broad and acute. _Stigmas_ 5, filiform. Fruit not seen. * * * * * PLATE 146.--Fig. 1, calyx; Fig. 2, longitudinal section of the flower showing the monadelphous stamens; Fig. 3, petals; Fig. 4, stamens; Fig. 5, pistil; Fig. 6, cross-section through the ovary. F.P.S.A., 1924. [Illustration: _147._] PLATE 147. THUNBERGIA NATALENSIS. _Transvaal, Cape Province, and Natal._ * * * * * ACANTHACEAE. Tribe THUNBERGIEAE. THUNBERGIA, _Linn._; _Benth. et Hook. f. Gen. Plant._ vol. ii. p. 1072. * * * * * =Thunbergia natalensis=, _Hook. Bot. Mag._ t. 5082; _Fl. Cap._ vol. v. sect. i. p. 4. * * * * *