HKPATIC^ COLLECTED IN CENTRAL AFRICA. 315 



Porotrichitm:, Brid. 



p. PENN^ FORME, C. MvlL 



Hah, Kilimanjaro, Bishop Hannington. Found also in S. 

 Africa {Thamnium complanatum, Schimp.) ; also in Madagascar 

 (P. madagassum, Kiaer.), and on the Cameroon Mountains, O. 

 Thomson. It is very similar to P. longirostrum. 



P. PTEROPS, Behm. 



Sah, KiJimaujaro, Bishop Hannington, Natal, Br, Rehmann. 



P. rsAGARUM, sp. n. Folia rami primarii rotundo-orata, apice 

 abrupta, apiculo parvo, nervo valido infra apicem abrupte desi- 

 nente, ramuHiia rotundo-oblonga apiculo brevi, omnia margine 

 apicem versus serrulata e cellulis densis ovalibus areolata. 



Hah. Usagara Mountains. 



Closely resembling the P. elegans from Samoa, in size, colour, 

 ramification, and appearance, but distinct in the form of its 

 foliage. It is one of a number of small species which differ more 

 lu appearance than in any other particular from those which 

 agree in aspect with P. longirostrum. 



These constitute the section denominated by C. Midler '' Pinna- 



tella^^ and he has described two species collected by Dr. Schwein- 

 furth in Monbuttu, and another from Comoro, P. Geheehii (Linn. 

 1876, p. 272), the description of the leaves of which applies nearly 

 to P. usagarum ; and this last may be but a more grown-out state 

 which has not subsimple stems sparingly pinnate as stated in 

 the description. Other species are found in Madagascar and 

 Mauritius ; all have a general resemblance to P. elegans, and agree 

 in the dull, not glossy, foliage and tree -like stems. From the 

 aboA^e the group of species designated by C. Miiller Anastrephi- 

 dinm differ in their stiff and more glossy foliage, and a great 

 tendency of the branches to run out into slender attenuated 

 flagelliform shoots. To this group belong the P. ramulosunty Mitt, 

 in Journ. Linn. Soc. vii. p. 160, from the Cameroons, from which it 

 seems diflBcult to distinguish P. pennceforme var. IracJiyphyllum^ 

 Eehm. 334, from Inanda, Natal, gathered also in S. Africa by 

 Cooper, and P.flageltacenm^ Mitt, in Trans. Linn. Soc.ixiii. t. 5, 

 from which the Homalia elongata, Duby, Mem. de la Soc. de 

 Phys. de Geneve, tom. xxi. t. 2. f. 3, may not be different. 



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