ASCLEPIADACE^ AFRICANS 365 



bus, floribus in cymis interaxillaribus subumbellatis sat longe 

 peclunculatis pancifloris dispositis, pedunculis ut bracteae subulatae 

 pedicellique has facile superantes pubescentibus, calycis segmentis 

 lineari-lanceolatis longe acuminatis dorso pubescentibus, corollae 

 extus pubescentis tubo juxta basin inflate inde adusque fauces 

 cylindrico ipsis faucibus parum dilatato lobis quam tubus fere 

 triple brevioribus late oblongis replicatis apice connatis, coronas 

 exterioris 5-lobi lobis triangulari-ovatis obtusis villosulis coronge 

 interioris phyllis coronam exteriorem certe excedentibus ligulatis 

 sursum incurvis, antheris anguste ovoideis harum alis prominen- 

 tibus, folliculis lineari-fusiformibus glabris. 



Hab. Angola, Luassingua, T'Chirandongambe ; Gossweiler, 

 2552. 



Folia 5-6 cm. long., 7-10 mm. lat., in sicco brunneo-viridia ; 

 petioli 4-7 mm. long., pubescentes. Pedunculi plerique 2-3*5 cm. 

 long., rarissime modo 1 cm. Bracteae 2-3 mm., pedicelli plerumque 

 5-8 mm. long. Calycis segmenta 4 mm. long. Corolla in toto 

 21 mm. long. ; tubus 15 mm. long., juxta basin aegre 5 mm. lat., 

 superne 2-5 mm., faucibus 4 mm. lat. ; lobi 6 mm. long. Corona 

 exterior 2-5 mm. long., hujus lobi 1-75 x '75 mm. ; coronae in- 

 terioris phylla ad 2 mm. ex coronam ext. eminentia. Columna 

 staminea 2 mm. long. ; antherarum alae 1 mm. long. Folliculi 

 5 cm. long. ; semina 5 mm. diam., coma circa 3 cm. long. 



According to N. E. Brown's clavis (Fl. Trop. Afr. iv. i. p. 436) 

 this should be placed next C. convolvuloides A. Bich., a species it 

 by no means resembles in its flowers. 



C. UMBRATicoLA K. Schum. Mr. Gossweiler sends a specimen 

 of this remarkable and extremely rare plant, the only specimen in 

 this country. It grows in woods at Coyembe, Kubango (no. 2286). 



Brachystelma arenarium, sp. nov. Planta semispithamea 

 rhizomate tuberoso radices paucas simplices crassas emittente, 

 caule erecto inferne simplici nudoque superne ramos foliosos 

 sparsim gignente pubescente dein glabrescente, foliis brevipetio- 

 latis linearibus vel lineari-oblongis obtuse acutis basi obtusis 

 membranaceo-crassiusculis utrinque sparsim scabriusculo-pubes- 

 centibus, umbellis interaxillaribus sessilibus paucifloris, pedicelhs 

 quam flores longioribus griseo-pubescentibus, calycis segmentis 

 quam corolla multo brevioribus lineari-lanceolatis acutis pubes- 

 centibus, corollae campanulatae extus puberulae tubo quam lobi 

 triangulari-deltoidei acuti duplo longiore, coronaa exterioris phyllis 

 bipartitis segmentis uno latere coronae int. phyllis adnatis late 

 oblongis apice pulvinatis coronae interioris phyllis ut coronam ext. 

 ita antheras longe superantibus spathulato ligulatis emarginatis 

 superne incurvis, stylo apice truncato. 



Hab. Angola, in alluvial sandy pastures along the bank of 

 the Cubango, near Forte Princeza Amelia ; Gosstveiler, 2312. 



Tuber globulare, carnosum, baud lactifluum. Folia plerumque 

 3-6 cm. long., 3-8 mm. lat. ; petioli 2-3 mm. long. Umbellae 

 3-5-florae, 12-15 mm. diam. Pedicelli 7-10 mm. long. Calycis 

 segmenta 2 mm. long. Corolla atropurpurea, hircina, 7 mm. 

 diam.; tubus 6 mm. long., basi 4 mm., faucibus 6 mm. lat. ; lobi 



