3"" ; année. N" 6. Juin 1895. 



BULLETIN DK L'HERBIER BOISSIER 



NOTES 



ON THK 



POTAMOGETONES OF THE HERBARIUM BOISSIER 



(Herb. Boissier. — Herb. Barbey-Boissier. — Herb. Reuter et Barbey.) 

 BY 



Arthur BE\iVLTT 



The spécimens in the three above named Herberia sum up to the large 

 iiimiber of 1148 examples. In ail large herberia there is of course a slock 

 of spécimens which are seen in nearly every one consulted, mixed in 

 various ways with others of much interest. as typical, or authentic spé- 

 cimens. Tluis in the Berlin herberium the spécimens of this genus in 

 Willdenow's collection are of much interest, in that at Yienna those of 

 Wulfen, at Munich those of Schreber, in that of M. Casimir de Candolle 

 a complète séries of the species and varieties of the 3 éd. of Rohling's 

 Deut. Flora (1823) which were sent by D r Koch in 1824 (this éd. having 

 been edited by Mertens and Koch) and at the Linnean Society in London, 

 those of Linneus and Smith. 



It would occupy far too much space to detail too closely the various 

 spécimens conlained in the Herb. Boissier, but l propose to make a few 

 notes on some that seem of interest in the collections. 



1. P. natans L. Sp. pi. éd. 1. (1753). 



Since the Unies when colora tus, polygonifolius. and natans (seg) were 

 ail considered one species, there seems to hâve been no definile idea as 

 to the restriction of the part that Hooker in his Students Brit. FI. calls 

 bull. herb. Boiss., juin 189o. 19 



