ALABASTRA DIVERSA 183 



the top of the west side ; both parents were still in flower, the 

 situation being much more exposed and bleak. 



I adopt Miller's name (H. marifolium), following Mr. F. N. 

 Williams ; Cistus canns L. appears to differ from the British 

 species, which has been called H. canum Dunal. 



ALABASTKA DIVEKSA.— Part XXIII. 



By Spencer le M. Moore, B.Sc, F.L.S. 



1. Plantarum novarum Africanarum 

 a Rev. F. A. Rogers lectarum pugillus.* 



Vernonia (^ Lepidella) Rogersii, sp. nov. Planta fere tri- 

 spithamea caule e radice sat valido sparsim fibrilloso erecto hac 

 atque iliac ramulos breves emittente hispidulo-piloso tandem 

 glabrescente, foliis oblanceolatis vel anguste oblongo-obovatis 

 obtusis basi in petiolum brevem latumque gradatim desinentibus 

 supra scabriusculis subtus costa centrali pilosa exempta glabris, 

 capitulis mediocribus subhemisphaericis circa 50-flosculosis in 

 cymam longam laxam sparsim bracteatam oligocephalam digestis, 

 pedunculis propriis capitula excedentibus subaequantibusve, invo- 

 lucri 3-4-serialis phyllis anguste linearibus ceteris gradatim lati- 

 oribus intimis lineari-lanceolatis omnibus longe acuminatis necnon 

 puberulis, corollis haud exsertis purpureis, achaeniis subcylindricis 

 (basin versus leviter angustatis) 4-5-costatis inter costas rugulosis 

 appresse puberulis, pappi straminei squamis anguste lineari- 

 lanceolatis acutis quam setae scabriusculae corollis subaequilongae 

 7-plo brevioribus. 



Hab. Portuguese East Africa, Machado ; Bogers, 4527. 



Caulis 5 mm. diam., longitrorsum optime sulcatus. Folia 

 longit. 10 cm. attingentia, latit. 3 cm., saepius vero minora, ramu- 

 lorum 2-3 cm. x 6-10 mm., papyracea, in sicco viridia; costa 

 centralis crassus, pag. inf. maxime perspicua ; petioli circa 1 cm. 

 long., 2 mm. lat., hispidulo-pilosi. Cyma speciminis unici nobis 

 obvii circiter 30 cm. long. ; hujus rami griseo-purpurei, longi- 

 trorsum sulcati ; bracteae oblongae (summae lineares) + 1 cm. long. 

 Pedunculi proprii nunc ± 1 cm. nunc + 3 cm. long., sub capitulis 

 dense pubescentes. Capitula 1 x 1-5 cm. Involucri phylla 

 extima 6-7 mm., intermedia 8 mm., intima 10 mm. long., haec 

 trinervia, omnia viridia apice vero ipso pallide purpurea. Corollae 

 in toto 7*5 mm. long., harum lobi aegre 2 mm. Styli rami 2 mm. 

 long. Achaenia 2-5 mm. long. Pappi squamae fere 1 mm., setae 

 7 mm. long. 



This is near V. demulans Vatke, from which it can be dis- 

 tinguished on sight by the larger capitula with their lengthily 

 acuminate involucral leaves. 



* The types of the plants described are in the National Herbarium. 



