70 THE PLANTS OF WELWITSCh's APONTAMENTOS. 



p. 295, pi. ii. f. 28). We have Eichler and Gutwiuski's species 

 from the United States, and have had it described in MS. as 

 S. spicATUM for some time. Figures of American specimens 

 of S. sjiicaitim will shortly be published in a paper on N. American 

 DesmidiecB. 



Staurastrum Meriani Keinsch forma Schmidle (Einzell. Alg. 

 aus den Bern. Alp., Hedwiciia, 1894, p. 91, taf. vi. f. Qa-c). This 

 form, described and figured by Schmidle, certainly does not belong 

 to 8. Meriani (especially fig. Qa), but much more closely resembles 

 S. Kjellmani Wille. 



Staurastrum poDLAcmcuMEich. &Gutw. (Nonn. Alg. Nov., Krak. 

 Akad., 1894, p. 14, t. v. f. 49). This seems to be but a three-ended 

 and smaller form of S. nligacaiithum Breb., with fewer denticulations, 

 which appear to be more regular. It agrees with this species in all 

 other respects, and might in consequence be called S. oliifaccmthnm 

 Breb., var. podlachicum. 



Staurastrum polymorphum Breb., var. pentagonum Harvey 

 (Freshw. Alg. of Maine, iii., J3hU. Torrey Bot. Club, April, 1892, 

 p. 122, pi. cxxvi. f. 14, 15), and S. Sehaldi Eeinsch, var. quatenium 

 Harvey {I.e. p. 123, f. 16, 17). We fail to see the resemblance 

 between the figures of these two forms to either S. poIymorpJmm or 

 S. Sehaldi. The figures given by Harvey of S. Arctiscun (Ehrnb.) 

 Lund., var. crenulatum Harv. (f. 18), and of S. Saxoniciua Buln., 

 var. pentagonum Harv. (f. 26, 27), are too crude to be of any value. 

 On the same remarkable chart there is a S. Avicula Breb., var. 

 brevispinum Harv. (p. 122, f. 13), which "differs from the type in 

 being larger (35 /x d) . . . , and the sides of the end view concave." 

 We may point out that 35 /x is but the ordinary size of S. Avicula, 

 and that a character of this species is in the concave sides of the 

 vertical view. 



THE PLANTS OF WELWITSCH'S APONTAMENTOS, &c. 



By James Britten, F.L.S. 



From time to time I have noticed, when consulting the Index 

 Keu^ensis, the retention of various names, published by Welwitsch 

 in his Apontainentos,* which have since been reduced as synonyms, 

 and the omission of others which appear in that work and in his 

 Synapse e,xplicatica,\ as well as in scattered notices of his travels. 

 The plants intended can only be satisfactorily determined at Lisbon, 

 where the study-set of Welwitsch' s plants, with all his notes, is 



* Apontameutos phyto-geographicos sobre a flora da proviucia de Angola na 

 Africa equinocial servindo de relatorio preliminar acerca da exploravao botanica 

 da mesma provincia, executada por ordem de sua Magestade Fidelissima pelo 

 Doutor Frederico Welwitsch: in Annaes do Conselho Ultmmarino, Dec. 1858, 

 pp. 527-593. 



t Synopse explicativa das amostras de Madeiras e drogas medicinaes .... 

 coUigidos na provincia de Angola enviados a Exposicao Internacional de Londres 

 em 1862 .... por Frederico Welwitsch. Lisboa, 1802. 8vo, pp. 56. 



