DESCRIPTION:--_Stems_ elongate, terete or somewhat sulcate, 1/3-1 ft. long, with 6 to many leaves on the upper part or near the apex and numerous imbricate membranous sheaths below. _Leaves_ distichous, linear-oblong to elliptic-lanceolate, subacute, ¼-1 ft. long, ½-1½ in. broad, with 3-5 prominent veins. _Panicle_ terminal, ½-1 ft. long, usually with several branches, rarely reduced to a simple raceme, with a few short sheaths below. _Bracts_ triangular-ovate, subacute, 1/6 in. long. _Pedicels_ slender, 1-1¼ in. long. _Flowers_ medium-sized, light yellow, more or less barred or blotched with light dusky brown; sepals and petals spreading, oblong or elliptic-oblong, obtuse, about ¾ in. long; lip 3-lobed, rather shorter than the sepals; side lobes erect, oblong, obtuse; front lobe recurved, elliptic-oblong, obtuse or emarginate; disc with 3 prominent crenulate keels; column clavate, 1/3 in. long (National Herb. Pretoria 2601). * * * * * PLATE 122.--Figs. 1, 2, front and side view of flower; Fig. 3, lip; Fig. 4, column; Fig. 5, pollinia. F.P.S.A., 1924. [Illustration: _123._] PLATE 123. PACHYPODIUM SAUNDERSII. _Transvaal, Swaziland._ APOCYNACEAE. Tribe ECHITIDEAE. PACHYPODIUM, _Lindl._; _Benth. et Hook. f. Gen. Plant._ vol. ii. p. 722. Pachypodium Saundersii, _N. E. Br. in Kew Bulletin 1892_, 126; _Fl. Cap._ vol. iv. sect. i. p. 516. It is with pleasure that we figure for the first time this species of _Pachypodium_, which flowered at the Division of Botany, Pretoria, in 1923, from tubers forwarded by Mr. J. Kirton, Pietersburg, Transvaal. The genus _Pachypodium_ differs from _Adenium_ (see Plate 16) in having a pair of spines at the base of the leaves, but the present species agrees with _Adenium multiflorum_ in its general habit. Both have large succulent stems, partly below the ground, from which the branches arise. In _Pachypodium Saundersii_ the pollination mechanism is somewhat complicated, but in what way the various structures function in this is not quite clear. The flowers are protandrous and the anthers all converge to a point. The base of the anther is provided with a pouch and the filament with a ciliated hood, and these two structures form a cage for the pollen. The stigma lies within this cage, and the style may possibly elongate eventually, and thus push the pollen above the anthers, as in the _Compositae_. The plant flowered freely in Pretoria, but failed to fruit, and from this it may be assumed that self-pollination does not take place.