BULLETIN DE L'HERBIER BOISSIER. (10) 



51. P. tricarinatus G. Muell. and Ar. Beim, in J. of Botany, 229 



(1892). 



A rare Austrahan species that was named « P. tricarinatus » by Baron 

 v. Mueller some years ago in Herb. Kew. Some of Ihe Australian spéci- 

 mens named na (ans belong hère, but without fruit it is impossible to dé- 

 cide as to this, P. sulcatus mihi, and P. Tepperi mihi. In thèse plants 

 absolu tely ripe fruit is a desideratum, as the changes that take place from 

 the fruit forming of the fruit to maturity are very great, only exceeded by 

 that peculiar fruited species P. cristatus Regel and Maack, a native of 

 Ussuria. China, and Japan. 



52. P. ochreatus Raoul, Ann. sc. nat. ser. 3, 2, 117 (1844), and 

 Choix de pl. de la Nouv. Zélande 13, t. 7 (not 6 as in text) (1846). 



A New Zealand and Australian species, the P. gramineus of R. Brown's 

 Prod. Fl. Nov. Holl. 343 (1810), and the obtusifolius of Bentham's Fl. 

 Austr. 7, 172 (1878). 



ü. Schumann in the Fl. Brasiliensis describes a nov. sp. as P. Ulei Seh. 

 116, 690 (1894) which he compares with Raoul's species. I have not seen 

 bis spécimens. 



53. P. nigrescens Fries, Nov. Fl. Suec. Mart. 3, p. 17, 181 (1842). 

 An original spécimen from Lastadiusisin the herberium, on which the 



species was described by Fries, and which the finder called « P.rufescens 

 var. foliis longe petiolata ». The subséquent spécimens distributed by Fries 

 under nigrescens were différent planls (heterophyllus forms 1 ?), and there 

 seems no reason to doubt that it was a boréal form ofrufescens (alpinus) 

 as supposed by Lasladius. 



Liste des espèces que M. Arthur Bennett n'a pas trouvées dans l'Herbier 

 Boissier et que le dit herbier serait heureux d'échanger contre d'au- 

 tres plantes. 



Potamogeton Bevteroanus Phillippi Linnrea 30, 200 (1859-60). S. Am. 



erkUitus Regel et Maack F. Ussur. 9, J. 10, f. 3-6 (1861). Asia. 

 crassi/blius Fryer in Journal of Botany, t. 299, 321 (1890). Eng. 

 Cwrtisii Morong Torrey Bull. 145 (1886 April). S. U. States. 

 — Deïavayii Art. Benn. in J. of Bot. 228 (1892). China. 



Drwnmxmdii Benth. Kl. Aust. bot. 7, 171 (18 8). Austral. 

 falcatus Fryer in Jour, of Botany, t. 286, 65 (1889). Eng. 



