314 Pub. Puget Sound Biol. Sta. Vol. 2, No. 53 



2. Taxonomy 

 a. General 



The genus Desmarestia was established by Lamouroux in 1813, in 

 his masterly "Essai sur les Genres de la Famille des Thalassiophytes non 

 articulees", and as outlined by him consisted of four species, D. acideata 

 (L.), D. viridis (Muell.), D. ligulata (Lightf.) and D. herbacea. (Turn.). 

 Agardh (1824), the celebrated Swedish algologist, adopting a different, 

 but no less scholarly system of classification, grouped the four species 

 which Lamouroux had placed by themselves, with several others under the 

 genus Sporochnus. Agardh sub-divided his genus Sporochnus into two 

 groups according to external appearance, the filiform and the plane, put- 

 ting Lamouroux's D. aculeata and D. viridis in the filiform group, and D. 

 ligulata and D. herbacea as the only members of the plane group. Postels 

 and Ruprecht (1840) classified the filiform species as Desmarestia and 

 the plane species as Desmia, the latter a genus name proposed by Lyngbye 

 (1819) to take the place of Lamouroux's Desmarestia, but severely criti- 

 cised by Greville (1830). Subsequent writers have seen fit to retain Lam- 

 ouroux's genus Desmarestia with Agardh's sub-divisions. 



Naturally with increased facilities for exploration and collection, and 

 for study, numerous additions have been made to both groups of the 

 genus. The present pajier, dealing with the ligulate species which occur 

 on the north Pacific coast of America, includes four species: D. ligulata 

 (Lightf.) Lamour., D. herbacea (Turn.) Lamour., D. latissima Setch. and 

 Card, in litt. n. sp., and D. foliacea n. sp. 



b. Desmarestia ligulata (Lightfoot) Lamouroux 

 (Plate 54, Figs. 1, 2; Plate 62; Figs. 1-7; Plate 63.) 



Fucns ligulatus Lightfoot Flora Scotica 946. 1777 



Smith English Botany, t. 1636 1790 



Goodenough Linn. Trans. 3: 123. 1797 



Fucus herbaceus Hudson Flora Anglica p. 582. 1798 



Fticus ligulatus Lightfoot Nereis Britannica, (App.). 1801 



Fucus herbaceus Espcr Icones Fucorum 7:118 1808 



Turner Hist. Fuc. 2:74. pi. 98 1809 



Laminaria ligulata Hooker Flora Scotia, Part 2. 99. 1821 



Sporochnus ligulatus Agardh Sp. Alg. 1:158. 1821 



Syst. Alg. 261 1824 



Greville Flora Edinb. 287. 1824 



Sprengel Syst. Veg. 4:330, 1827 



