ASOLEPIADACE^E ELLIOTIAN/E. 803 



R. Flanagani. The corona-scales are oblate in outline, with only 

 the middle filiform lobe produced, whereas the two lateral ones are 

 turned down inwardly, and completely connate with the body in such 

 a way that the corona-scales appear to be furrowed in the middle of 

 the inner side. This furrow, however, is occupied by the stalk of 

 the anther. 



PLEUROSTELMA Schltr., n. gen. Calyx alte 5-partitus, 

 intus subinconspicue 5-glandulosus, lobis lanceolatis acutis. Corolla 

 alte 5-fida, etubulosa, lobis erecto-patentibus ovato-oblongis obtusis. 

 CorontB foliola inter se libera linearia erecta valde compressa, apice 

 lacerata, facie interiore in appeudicem e basi deflexa curvato-ad- 

 scendentem filiformem elongatum producta, in sinubus petalorum, 

 antheris opposita. Anthera? breviter stipitatre apice conniventes 

 exappendiculatae ; polliniis parvuli-clavatis obtusis. Stigma capi- 

 tatum. 



Pleurostelma africanum Schltr., n. sp. Suffrutex volubilis 

 alte scandens, plus minus ramosa vel subsimplex ; ramis teretibus 

 remote foliatis, glaberrimis ; foliis patentibus angustissime lineari- 

 bus acutis marginibus revolutis, basi in petiolum brevissimum 

 angustatis, 4-6 cm. longis, utrinque glaberrimis ; floribus in cymis 

 laxis subcorymbosis, extra-axillaribus, plurifloris; pedunculo gracili, 

 pedicellis filiformibus glaberrimis floribus sub^equilongis ; floribus 

 (fide collectoris) niveis, glaberrimis ; calycis segmentis minutis 

 lanceolato-triangulis acutis glabris, vix 0-1 cm. longis; corolla) lobis 

 erecto-patentibus lanceolato-oblongis obtusis, utrinque glabris, 0*7 

 cm. longis, medio fere 0"3 cm. latis ; coronte foliolis erectis line- 

 aribus valde compressis, apice setaceo-elongatis, facie interiore 

 in appendicem e basi refracta curvato-adscendentem demum 

 erectum squamas multo excedentem filiformem productis ; antheris 

 breviter stipitatis apice conniventibus, lanceolatis obtusiusculis ; 

 polliniis parvulis spathulatis obtusis, glandula subrotunda pro 

 magnitudine pollinioram satis magna ; stigmatis capite obtusato. 



Mombassa, " Red sand, a climber with white flowers," No. G175. 



This is the type of a most distinct new genus, quite unlike any 

 other in the structure of the corona-scales. It is difficult to suggest any 

 affinity for it at present ; but doubtless it must be placed, according 

 to Bentham's arrangement of the order, near Raphinyiacme, a genus 

 very different in coronal structure. The habit of the species is also 

 very remarkable, so much so, that at first I doubted whether it was 

 an Asclepiad at all. The corona-scales appear to be very thin, and 

 nearly membranous. It was impossible for me to ascertain whether 

 the appendages of the corona-scales are all coherent at the top, or 

 whether they are free, for, on account of their thin texture, they 

 seem to stick together whenever the smallest drop of water touches 

 them. 



Secamone R. Br. 



Secamone zambesiaca Schltr., n. sp. Frutex volubilis, alte 

 scandens ; ramis teretibus plus minus verruculosis, glaberrimis, 

 remotius foliatis ; foliis patentibus ovatis vel ovato-ellipticis, acutis, 

 inargine plus minus undulatis, utrinque glabris, 3-5 cm. longis. 



