vol. ii Setchell— Gardner. — Algce of Northwestern America. 325 



Pteridium? serratum f. platyphyllum Setchell and Gardner 



f. nov. 



Fronds up to 10 cm. high, subdichotomous below, regularly 

 alternately pinnate above, rose red, linear, entire, with promi- 

 nent midrib and microscopic lateral veins. The width varies 

 from 5 mm. in the lower part, to 2 mm. just below the tips of the 

 branches. Sori on each side of the midrib and ascending along 

 the microscopic veins, continuous from near the base to just below 

 the tips. Cystocarps"?. 



On a woodeu float. Pleasant Beach, Kitsap County, Wash., 

 X.L.G., No. 344! 



Answering very well to the description of Pt. serratum, except 

 that the frond is twice as wide and the margins smooth. The 

 plant has the color and consistency of Apoglossum decipiens, but 

 differs decidedly in its method of branching (we have seen no 

 proliferations of any kind) and the position of the sori. We 

 have seen what appears to be the same form from Santa Cruz, 

 California, collected by Dr. C. L. Anderson. We refer this form 

 to I't t'kI in in sei-rut u in with considerable doubt, since we have 

 been unable to examine a specimen of that species. 



Family BONNEMAISONIACR&J . 



Bonnemaisonia hamifera Hariot. 



In the upper sublitoral zone. West coast of Whidbey Island, 

 Wash.. X.L.G,, Xo 25!, and in Collins, Holden and Setchell, 

 P. B.A., No. 939! 



This species varies very much in breadth and the frequency of 

 the circulate branchlets. Some specimens are as much as 6 mm. 

 broad, while others are not over 1.5 mm. even in the broadest 

 portions. The Whidbey Island specimens show cystocarps, 

 antheridia, and tetrasporangia. It is to be found from May until 

 August. 



