338 University of California Publications. (botany 



Family CERAMIACE^E. 



Griffithsia ! 



Two different sets of plants are known to us from our terri- 

 tory, but neither possess reproductive organs of any kind, and 

 are, consequently, indeterminable. They are as follows: On 

 rocks, Tracyton, Kitsap County, Wash., Tilden, No. 208!, under 

 G. opuntioides , and on piles, Keyport, Kitsap County, Wash., 

 N.L.G., No. 495! We find a species on the coast of California, 

 which has also been referred to G. opuntioides. The Calif ornian 

 specimens are usually sterile, but we have seen some with tetra- 

 sporangia, and although cystoearps and antheridia are needed to 

 complete the diaguosis, it seems to be new, certainly not the 

 species to which it has been referred. 



Pleonosporium Vancouverianum J. Agardh. 



On stones in the upper sublitoral zone. Vancouver Island. 

 B. C, -/. G. Agardh (1876, p. 30, under Callithamnion Vancou- 

 verianum); Esquimalt, B. C, Harvey (1862, p. 17"), under 

 Gallithamnion thuyoideum, fide J. G. Agardh, 1876, p. 30); 

 East Sound, Orcas Island, Wash., N.L.G., No. 501!; Friday 

 Harbor, San Juan Island, Wash, X.L.G., No. 506! 



We have not been able to examine an authentic or type 

 specimen of this species, but the specimens referred here seem 

 to agree well with the description. Our plants agree well with 

 the figure of Callithamnion venustissimum in Kuetzing's Tabular 

 Phycologica? (1862, pi. 1) which J. 0. Agardh quotes under this 

 species with a query. The habit is certainly close. The pro- 

 carps in No. 506 are terminal and No. 501 has tetrasporangia. 

 with the contents divided into many spores. 



Callithamnion polyspermum Agardh. 



On membranous alga?. Esquimalt, B. C, Harvey (1862, p. 

 175); Vancouver Island, B. C, J. G. Agardh (1876, p. 32); 

 west coast of Whidbey Island, Wash., X.L.G., Nos. 163!, 619! 



The Whidbey Island specimens referred here are done so with 

 doubt. They are not well developed plants, but seem to belong 

 here. 



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