Distribution of the Laminar iacece. 349 



and to Dr. C. L. Anderson of Santa Cruz, Cal., for fine, large, dried 

 specimens from Monterey, Cal., and to Prof. Carl Eigenmann of 

 Bloomington, Ind., for an excellent younger specimen from San 

 Diego, Cal., preserved in alcohol. In the older specimens the stipe 

 is long and stout (about 2 feet long and 2 inches in diameter), 

 terete below but compressed above. At the top, it divides into two 

 stout branches (10 inches long in some specimens) which are sepa- 

 rated from one another above by a broad rounded angle. The 

 branches are very much flattened, rounded on the outer margin,^ but 

 nearly acute on the inner (or upper). The medulla, in cross-section 

 extends up to the inner margin and there ceases abruptly at the 

 surface as if cut off at that point. At the apex of each branch is 

 a bunch of leaves. The leaves are from one to two feet long, 

 linear-lanceolate in outline, very coarsely and remotely toothed on 

 the edges, and longitudinally wrinkled. They resemble very much 

 the pinnae of JEcMonia. They decrease in size (and in age) as they 

 approach the outer margins of the tips of the branches and finally 

 diminish to mere protuberances, thus showing that they arise as 

 outgrowths and that they are true sporophylls. A very young 

 specimen in Herb. Farlow, collected by Mr. Daniel Cleveland of 

 San Diego, Cal., shows a large terminal blade with the sporophylls 

 arising at its base as in Ecklonia. A comparison with JEcMonia 

 radiata suggests that the whole central part of the blade dies away 

 early, leaving the more active margins at the base with the pinnae. 

 This would make the " branches "belong partly to the thickened base 

 of the leaf, and partly to the stipe and the appearance of the medulla 

 in cross section, spoken of above, seems to warrant this explanation. 

 However this may be, JEisenia seems to be worthy of generic rank 

 and is related to EcMonia rather than to Postelsia. 



Subtribe 3. Egregieae. — The genus Egregia differs from all the 

 other genera of the Alariidese in that the sporophylls arise along the 

 entire length of both margins of the transition-place and therefore 

 are arranged, when full-growth, on the margins of both blade and 

 stipe. 



Egregia^ Aresch. — Egregia Menziesii (Turn.), Aresch. is one of 

 the most variable and most complex species of the Laminariaceie. 

 Herbarium specimens show very varied forms so that it seems diffi- 



^ Aresch., loc. cit. 

 Trans. Conn. Acad., Vol. IX. March, 1893. 



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