SEPATIC^ COLLECTED IN CENTRAL AFRICA. 311 



vaginantibus inde abrupte in mucronem aristiformen patentem 

 productis. 



Sab. TJsagara Mountains, Mr, Last. 



Another closely allied species is 0. dentata, sp. n. Eami 

 stricti curvative, ramulis sparsis pinnatitn ramosi interdum 

 subsimplici ; folia imbricata ovata latiuscule acuminata, apice 

 dentata, margine anguste recurva, nervo sub apice desinente, 

 perichsetialia lateralia parva ; foliis interuis erectis spathulatis, 

 apice paucidentatis, nervo inferne evanescente in mucronem 

 setaceum erecto patentem excurrente ; theca immersa ovali-cylin- 

 dracea, operculo brevi conico acuminate, peristomio interno 

 externum breviore. 



Sah. Umgoe Mountains, Natal, Mr. Plant ; gathered also by 

 Mr. Keit, No. 3. 



Both these African species agree generally with the Mexican 

 C. patens^ Hsch.,but are more slender ; they have no near resem- 

 blance to the Indian C. s^hcerocarpa. In the dried state the 

 two species are not very dissimilar ; but on wetting them a great 



difference is observable in the loose spreading foliage of C. laxi- 

 folia. 



C. (§ AcHOCEYPHiEA) Welwitschit, Duby^ Mem, de la Soc. de 

 Phi/s, de Oenhve^ torn. xxi. p. 426, t. 2. f. 1. 



Sah. Usagara Mountains, and on Kilimanjaro, Bishop San- 

 nington. It is found also in Madagascar. 



The specimens yet seen of this species, if indeed they all be- 

 long to one, are in too small quantity to afford sufficient means 

 of comparison; similar forms are found in India (C. concavifolia 



ifi 



All agree 



in their mode of fructification, and differ chiefly in their leaves ; and 

 it may reasonably be doubted if in reality they are all distinct, 

 or states of one or two species of which G.julacea^ Hornsch., from 

 Brazil, was the earliest known. It is not an easy matter to find 

 in some of the specimens what may truly be a cauline leaf on 

 stems which are merely fertile branches. 



Pkionodok, C. Mull. 



P. EEHMA^mi, sp, n. Folia subcompressa patula inferne 

 ovali-lanceolata anguste ligulato attenuata acuta (sajpissiine dif- 

 fracta), nervo sub apice desinente, margine late implana, superne 



