1922] Gardner: The Genus Fucus on the Pacific Coast 7 



J. Agardh (1848, p. 209) quotes Cliamisso's Unalaska specimen and 

 Sinclair's San Francisco specimen under F. furcaius Ag., at the same 

 time reducing F. edentatus De la Pyl. (1829, p. 84) to synonymy with 

 F. furcatus Ag. This seems to have been the beginning of the con- 

 fusion of the two species which has not, up to the present time, been 

 completely cleared up. 



Kuetzing (1849, p. 591) gives a brief diagnosis of the species as 

 follows: "F. phycomate lineari enervi piano furcato, digital!; carp- 

 omatibus terminalibus planis 1-1%" longis, phycomate latioribus." 

 "Ad oras oecidentales Americae borealis, ad Unalaschkam, Cali- 

 forniam. " In Tabulae Phycologicae, 1860, plate 17, figure II, he gives 

 a diagram of a portion of a plant from " Unalaschka " which shows 

 the receptacles to be 3 to 4 cm. long and very sharply pointed. This 

 figure was probably sketched from a portion of the type material 

 collected by Chamisso and. although it differs considerably from 

 Agardh 's figure (Icon. Ined., pi. 14), it may well represent a more 

 typical portion of a plant than Agardh 's. 



Euprecht (1851. p. 346) has the following to say concerning F. 

 evanescens Ag. and F. furcatus Ag., mentioned above: 



Ueber Fucus evanescens und furcatus kann ich jetzt, nach Einsicht der 

 Original-Exemplare in Cliamisso's Herbarium, em sicheres Urtheil abgeben. 

 Der erstere ist ein hochst unbedeutende, keineswegs bestandige Form von E. 

 vesiculosa und kommt nicht selten miter den Oehotskiseken Exemplaren vor; 

 die an den Fruchtzweigen verschwindende Blatt-Eippe bezeichnet diese Eorm 

 am wenigsten ; Chamisso 's Pflanze stammt von Bedowski, von der Westkiiste 

 der Ochotskischen Meeres, nicht aus Kamtschatka. 



Fucus furcatus C. Ag. ist eine selbstandige Art, waehst aber nicht bei 

 TTnalasehka, sondern in Nord-Californien bei Eoss, woher ich neuerdings mehrere 

 Exemplare sah. Von eben daher hat auch, nach meinem Dafurhalten, Chamisso 

 seine Pflanze mitgebracht; die beigelegte Etiquette mit "Kamtseh?" bezeichnet, 

 beweist, dass er selbst liber ihren Fundort im Zweifel war. 



Fucus furcatus J. Ag. (Sp. Alg. I, p. 209) ist ein ganz andere Tang (eine Var. 

 von B. vesiculosa?), als die gleiehnamige, in den Icon. Alg. ined. Tab. 14 

 abgebildete Original-pflanze. 



Harvey (1862, p. 163) again ascribes F. furcatus Ag. to the Pacific 

 Coast in determining Lyall's collections from Vancouver Island. He 

 remarks (loc. cit.) -. "My F. Wrightii from Japan scarcely differs. 

 I fear that neither ought to be regarded as other than local varieties 

 of F. vesiculosus, which sometimes, even in Europe, occurs with as 

 narrow fronds. The elder Agardh 's figure above quoted," that is, 

 Icon. Ined., pi. 14, "is worthless as a guide to the species described by 

 •J. Agardh." Fucus Wrightii is now known to be a species of Pelvetia 



