OBSERVATIONS ON LESSONIA. 
CONWAY MACMILLAN. 
(WITH PLATES XIX—XX1) 
THE observations recorded in this paper have been made upon — 
a plant cast up upon the beach of Vancouver island at Baird point, — 
on the strait of Juan de Fuca. It was collected by Miss Joseph- : 
ine E. Tilden, August 3, 1898, and portions of it were dis 
tributed in her American Alge under the name of Lessonia lit 
toralis Farlow & Setchell, this determination having been made 
by Professor De Alton Saunders and kindly furnished us by him. 
The plant when collected was apparently quite fresh, and must — 
have been developed near the point where it was found. oe 
day before its collection, I am informed by Miss Tilden that : 
heavy seas had been coming in, and these no doubt ae 
the plant and carried it up upon the beach. From the shape ! 
the holdfast it must have been growing ina cup-shaped ee 
sion of the rocks from which it had been detached wie 
great difficulty. : 
The general habit and appearance of the specimen I 
plate XTX, taken from a photograph made under my di 
Mr. C. J. Hibbard, of Minneapolis. The plant was rem : 
its tank of formalose and spread out upon a table top, Mae 
was then tilted at an angle of 50°, and the a “a 
close to the ceiling of the room, and depressed-so t a ae the: 
is not appreciably foreshortened and gives 4 fait | is 
plant. From the holdfast to the tips of the longes 
specimen measured two meters in length. A 
fast measures g*™ in diameter. Immediately above 
area the stipe is irregularly branched, develop 
pal trunks, each of which soon branches again. 
probable confinement in an almost hemispherical 
holdfast is extremely condensed and contorted. — 
318 
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