f>!)4 University of California Publications in Botany [Vol.8 



tribe 1. LAMINARIEAE bory (lim. mut.) 



Fronds with *well developed stipes and flattened blades; hapteres 

 sometimes elongated and producing new fronds; blades plane, undi- 

 vided or splitting from above downwards, at times bullose, but without 

 perforations, longitudinal ribs or folds. 



Bory de Saint Vincent, in Diet. Class., vol. 1, 1822, and vol. 9, 1826, 

 p. 187 (as family) ; De-Toni, Syll. Alg., vol. 3, 1895, p. 317 (in part) ; 

 Setchell, Kelps of the U. S. and Alaska, 1912*, p. 146. 



The tribe of the Laminarieae contains the single large genus, 

 Laminaria. It may be looked upon as containing the simplest, or, 

 certainly, the least modified of the members of the family and as the 

 type whence divergences have arisen or taken their departure. 



41. Laminaria Lamour. (in part) 



Fronds differentiated into three distinct parts, a basal holdfast, 

 composed either of a solid disk of more or less branched hapteres, a 

 stipe of greater or less length, and a blade ; both the stipe and the 

 blade may or may not have mucilage ducts; blade simple or more or 

 less deeply lacerated into few to many segments, plane or with intra - 

 marginal bullae and marginal ruffles ; growth intercalary at the base of 

 the blade; reproduction asexual, by zoospores borne in unilocular 

 zoosporangia among unicellular paraphyses in extensive sori nearly 

 covering both surfaces of the blade of the macroscopic plant, and 

 sexual, oogamous, on microscopic plants. 



Lamouroux, Essai, 1813, p. 20. 



The Laminaria of Lamouroux (loc. eit.) included plants now refer- 

 red to several genera and well distributed through the order Lamin- 

 ariales. The first three species, however, are of the genus Laminaria 

 as gradually restricted by later authors. The Lamouroux name is 

 antedated by the Laminarius of Roussel (1806), by the Saccharina 

 of Stackhouse (1809) and the Phyeodendron of Olafsen and Povelsen 

 (1772). Laminaria has, however, received the sanction of the Inter- 

 national Botanical Congress of Brussels (1910, see Briquet, 1912, 

 p. 76). While most of the species of Laminaria are readily separated 

 into those whose blade is digitate (i.e., split deeply into segments) and 

 those whose blade is entire, there are a few species seemingly present- 

 ing both conditions, e.g., L. cuneifolia of our coasts. 



