F. Børgesen : Rhodophyceæ of the Danish W. Indies. 



379 



8. Gracilaria laciQuIata (Vahl). 



Fucus lacinulatus Vahl, Endeel kryptogamiske Planter fra St. Croix 

 (1799) in Skrivter af Naturhistorie-Selskabet, 5. Bd., 2. Hefte, Kiøbenhavn 

 1802. 



Gracilaria multipartita (Clem.) J. Ag., Alg. Mediterr., 1842, p. 151; 

 Spec. Alg., vol. II, p. 600; Epicr., p. 423. Harvey, Phycol. Brit., pi. XV; 

 Nereis Bor.-Am., p. 107. 



Sphærococcus multipartitus Ag., Spec. Alg., p. 247. 



Fucus multipartitus Clemente, Ensajo, Madrid 1807, p. 311 (non vidi). 



For more synonyms compare De-Toni, Sylloge Alg., vol. IV, Sect. II, 

 p. 447. 



We are obliged, I think, to take up Vahl's name for this plant. 

 His description is clear and striking and cannot be misunderstood, 

 even if the specimens, upon which he founded his description, 

 cannot be identified with certainty at any rate at the present 

 moment. This is of course a regrettable drawback. There is in 

 the Herbarium of the Botanical Museum, Copenhagen, several 

 old specimens (called Fucus 

 lacinulatus) from the Danish 

 islands which surely have been 

 seen by Vahl, but none of 

 these bear his handwriting. 



And that the specific name 

 of Vahl has been used for this 

 plant is shown, too, by the 

 careful drawing of this plant 

 reproduced here (Fig. 366). It 

 is found in a book containing 

 drawings of several algæ origi- 

 nating from Professor Fr. 

 Weber in Kiel and later pre- 

 sented to the Botanical Lib- 

 rary, Copenhagen by his royal 

 Highness Prince Christian. 



Among the rather few spec- 

 imens, which I have gathered Cj/^"/^ • //~ ' 

 myself, forms are found which '^^ C^lCl/oLluZCtu5 



approach partly to the var. ^^ ^„^ 



,_, XT* / i-> Nr. 366. Gracilaria lacinulata (Vahl). 



granatea (Turn.) J. Ag. {= Fucus Compare the text. 



