4;^>0 Lxxxv. ASCLEPiADEiE (brow^). [Fockeu, 



tube 10, in two superposed series alternating with the longer teeth of 

 the tube, upper series arising near the top of the tube and decurrent as 

 keels within it, IJ-lJ Hn. long, linear, thicker than the teeth of the 

 tube; lower series arising near the middle of the tube J lin. long. 

 8taminal-column with scarcely any filament-part ; anther-appendages 

 large, about 3 times as long as the anthers, reaching slightly beyond the 

 middle of the corona-tube, inflated-oblong, obtuse. 



Mozamb. Dist. British Central Africa : Ngamiland ; on tlie Kwebe Hills, 

 :)000 ft., Lvgard, 299 I 



42. LEPTADENIA, R. Br. ; Benth. et Hook. f. Gen. PI. iii. 778. 



Calyx 5-lobed to the middle or nearly to the base. Corolla deeply 

 5-lobed, rotate or with a very short campanulate tube and spreading 

 lobes, valvate in bud, pubescent or bearded within. Corona of 5 short, 

 transverse or rounded, fleshy lobes, tipped with a tuft of hairs, or with 

 a subulate hairy point, inserted at the sinuses of the corolla. Staminal- 

 column arising from the bottom of the corolla, sometimes with a slightly 

 prominent inconspicuous undulate fleshy ring at the base; anthers 

 incumbent on the top of the style, subhorizontal or suberect, without 

 an appendage. Pollen-masses subhorizontal or suberect, solitary in each 

 anther-cell, pellucid at the apex, attached in pairs by short caudicles to 

 the pollen-carriers. Follicles smooth. Seeds crowned with a tuft of 

 hairs. — Shrubs, with twining or erect, rigid, much branched, rush-like 

 stems. Leaves opposite or none, very variable in the same species. 

 Cymes umbel-like, lateral between the bases of the leaves or 

 subaxillary, subsessile or pedunculate, many-flowered; flowers small. 



Species 5 or 6 ; one of the African species extsnds through Egypt into Ambia 

 and India, besides 1 oilier in India and 1 in Madagascar. 



Leafy twiners. 



Corolla-lobes 2-2^ lin. long, densely bearded inside 



with long jointed hairs 1. X. lancifolia. 



Corolla-lobe^ 1-1^ lin. long, pubescent inside . 2. L. heterophylla. 



Leafless shrubs. 



Branches terete, slender 3. i. Spartium. 



Branches compressed, jointed . . . .4. L.? visciformis. 



1. L. lancifolia, Decne. in Ann. Sc. Nat. 2 ser. ix. 269. Stem 

 twining, densely covered with a very minute tomentum. Leaves 

 spreading ; petiole J-f in. long ; blade 1-5 in. long, J-1 J in. broad, 

 very variable in form, usually ovate, ovate-lanceolate or lanceolate, 

 acute or acuminate, and cuneate, rounded or subcordate at the base, but 

 sometimes subhastate-ovate or linear-oblong or linear, w^ith a cordate, 

 subhastate or rounded base, all forms occurring on different branches 

 of the same stem, both sides puberulous, sometimes becoming glabrous 

 on the upper surface, sometimes both sides become more . or less sca- 

 brous. Umbels lateral, pedunculate, many-flowered, minutely tomen- 

 tose in all parts; peduncles 2-7 lin. long; pedicels l|-3 lin. long. 

 Calyx 5-lobed nearly to the base ; lobes 1-2 lin. long. Corolla campanu- 



