New AFRICAN CONVOLVULACE^. 37 



albo-tomentosa ; floribus axillaribus solitariis, pedicellis quam petiola 

 duplo brevioribus, bracteis clavato-oblougis ad medium calycem 

 attingentibus ; sepalis ellipfcicis obtusis ; corolla speciosa glabra 

 late tubulosa superne ampliata ; staminibus infBqualibus, a basi tri- 

 angulari pilosa insertis, polline sphferico ecliiuulato ; stigmate capi- 

 tato biglobulare. 



Hab. Dammara-land, T. G. Een, 1879. Herb. Mns. Brit. 



The whole plant as far as the exposed surface of the calyx bears 

 a short dense white tomentum. The leaves are scarcely If in. long 

 and slightly broader, and have a small apiculus ; the slender stiff 

 leaf-stalk is about 10 lines. The stout pedicel (| in. long) bears a 

 pair of erect bracts, i in. long by nearly 2 lines broad above the 

 middle. The blunt equal sepals are scarcely i in. long and ^ in. 

 broad. The corolla is 8 in. long, and very broadly tubular to just 

 above the middle, where it becomes gradually expanded ; the 

 stamens and style reach to about its middle. 



Near I. verhascoidea DC, but distinguished by its smaller more 

 rounded leaves, with a very rounded apex. 



Ipomoea Donaldsoni, sp. n. Frutex (?) lignosa, ramis vel 

 ramulis patentibus subteretibus spinosis ; foliis minimis reni- 

 formibus, in petiolis et facie inferiore dense pubescentibus ; floribus 

 inter minores solitariis, axillaribus, pedicellis brevibus ; sepalis 

 crassiusculis, 2 exterioribus late ovalibus quam interiora sub- 

 orbicularia vix brevioribus, glabris sed margine membranacea 

 breviter ciliata ; corolla infundibuliforme, purpurea, areis meso- 

 petalinis 5-lineatis distiuctis ; staminibus 5, in basi triangulare et 

 supra pilosis, polline sphasrico echinulato ; ovario, cum disco 

 annuliforme cincto, glabro, stylo tenui integro. 



Hab. Okoti and Schebele, Somali-land, Donaldson Smith, Sept. 

 1894. Herb. Mus. Brit. 



The stiff straight horizontal or slightly ascending branches, 

 like the axis bearing them, have a thin deep reddish bark, and end 

 in a sharp point. The very small leaves (2 lines long by 3 broad) 

 are borne two or more together on suppressed lateral shoots of the 

 spiny branches. The petiole is about as long as the leaf, which is 

 folded upwards along the midrib, thus protecting the only sparsely 

 hairy upper surface. The slender pedicels are 2^ lines long ; the 

 calyx 2 lines, the light purple corolla 8 lines, and nearly as much 

 across the open mouth ; the stamens 3| lines, the style, which is 

 broken off" below the stigma, exceeding them. 



The species is at once distinguished by its remarkable xero- 

 philous habit. 



Ipomcea blepharophylla Hallier, var. cordata, var. nov. Foliis 

 basi cordatis, quam in typo latioribus et ovato-oblongis. 



Hab. Marungu, Ukikuyu Country, J. W, Gregory, July 14, 

 1893. Herb. Mus. Brit. 



Differs from the type in the invariably cordate, not entire, base 

 of the leaves, which are moreover often broader, and not of uniform 

 breadth, but become gradually narrower from base to apex. The 

 general habit and characters of inflorescence and flowers correspond 

 BO well that I do not thmk the plnnt is specifically distinct. 



