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Pilotrichella pallidicaidis CM. seems very close to P. mollis. 



Leucobryum interruptum and laticaule seem both to be forms of 

 L. candidum Hampe. 



Mnium Nova Selandice is M. roglratum Handbk. 



Polytrichum rubiginosum C. M. is P. commune Linn. 



Catharinea glauca Hampe, a variety of Polytr. magellankam. — 

 C. microdendron C. M. is P. dendroides of Handbk. 



Funaria spTuerocarpa C. M. is F. hygrometrica Hedw. 



Dicranum turgidum 0. M. is D. angustvnerve Mitt. (See Flora 

 Tasmania). 



Campylopus leptocephalus C. M. is C. introflexus Hedw. 

 A number of others seem to be of as doubtful value. 



NOTES ON CONVOLVULACE^, CHIEFLY AFEICAN. 

 By James Britten, F.L.S. 



In the course of writing up our African Convolvulaceae in 

 accordance with Dr. Hallier's monograph (Engler, Bot. Jahrbucher, 

 xviii. 81-160 ; 22 Dec, 1898), I have made some notes which 

 may be worth recording. Mr. J. G. Baker (Bulletin of Miscellaneous 

 Information, Feb. 1894, 67-74) has published some additions to the 

 above, but neither of these authors has described all the novelties 

 collected by Dr. Welwitsch, of whose plants we have in the British 

 Museum a magnificent series, scarcely second to the study-set at 

 Lisbon, with copies of all the valuable notes with which Dr. Wel- 

 witsch enriched his collections. These novelties I hope, with 

 Mr. Rendle's assistance, to describe in a later instalment of this 

 paper ; at present I propose to call attention to certain necessary 

 changes of nomenclature which it is desirable to make as early as 

 possible, in order that the inaccurate names may not get into 

 general circulation. 



Ipomoea Buchneri Peter in Engl. Pr. Nat. Pfl. 43, p. 29 (1891).— 

 Under this species Dr. Hallier places as var. /3. tomentosa Wel- 

 witsch 's no. 6182, adding a note, "In einer der beiden letzten 

 Arten gehort jedenfalls I. prismatosiphon Welw., Apont. p. 585 n. 

 18 ausPungo Andongo in Angola." Welwitsch's 6182 is the type 

 of his prismatosyphon, and his name must therefore stand for the 

 species. The following description is modelled upon Dr. Hallier's 

 amplified diagnosis of I. Buchneri as modified by Welwitsch's 

 specimens and notes : — 



I. prismatosyphon Welw. Apont. 585 (1858).— Suffrutex erectus, 

 4-6 pedalis, pluricaulis ; caules erecti rigidi lignosi crassi, cinereo- 

 pubescentes, dense foliosi; folia breviter petiolata, oblonga, basi 

 subrotundata, apice rotundata mucronata, margine inasqualiter 

 undulato-subsinuata, supra molliter puberula, subtus dense albo- 

 lanata, pinninervia; flores speciosissimi, maximi, axillares, patentes 

 vel subnutantes, solitarii, breviter pedunculati, paullo infra calycem 

 bracteis 2 maximis, intus glabris, subtus pubescentibus orbicu- 



