II 



NOTES 



ON THE 



J=> OTA 2sA C) GET ONES 



OF THE 



HERBARIUM DELESSERT 



BY 



Arthur BENMETT 



Paru le o novembre 1905. 



1. Potamogeton lucens L. — Iles Mariannes (Gaudi- 

 chaud). 



This is 110 doubt an authentic spécimen, and the plant described 

 by Chamisso in Linnsea, 2, 199, 1827 (under P. lucens) as 

 P. G-audichaudii. 



This being so my référence of P. Gaitdichaitdii to P maliana 

 Miq. was an error.; as Chamisso's plant clearly cornes undei- 

 lucens as placed by him. 



It remains to be decided whether Miquel's plant should bear bis 

 name, or that of P. mncronatus Près!.! Epim. Bot. 245, 1849. 

 P. mucronatus Schrad. is still used for P. Friesii Rupr., notwith- 

 standing the observation of Mertens and Koch Deutschl. FI. éd. 3, 

 860, 1823. For myself I believe Schraders P mucronatus to be 

 P acuminatus Schum. = P. comutus Presl. At the very time 

 (1818) when Rœmer and Schultes published their Syst. Nat. 3, 

 518 they say « Quid P mucronatus Schrad.? ». Yet authors refer to 

 them for the name. And there is in a Swiss herbarium a spécimen 



