76 ERYTHEA. 



without them in this one can not be quite sure of the genus to which 

 the species belongs. A section of tlie fronds, which are about 3nnn. 

 broad, shows a central axis of longitudinal hyaline filaments 

 surrounded by a zone composed of two or three layers of compara- 

 tively large sphteroidal cells with a cortex of much smaller, very 

 regular, densely packed, and highly -colored cells, which appear 

 nearly square in sections and are arranged in anticlinic rows. 

 The cystocarps I have seen were quite mature, and I found none of 

 their earlier stages. They arise in the subcortical layer, or rather 

 on the external portion of the axillary layer, and are formed of a 

 single nuclear mass of spores, with an ill-developed pericarp which 

 apparently is formed of filaments which arise from cells at the base 

 of the spore- mass. There is a well-marked carpostome. The gene i*til 

 structure is that of Cryptonemia as that genus was formerly defined. 

 Our plant appears to be nearly related to Cryptonemia rigida of 

 Harvey's Ceylon Algse and to Phyllophora Maillardi Mont. & Millar- 

 det and should be included with them in the genus Polyopes as limited 

 by Agardh in Till Algernes Systematik, Part IV, 16 et seq. A 

 knowledge of the tetraspores might perhaps lead one to a different 

 view as to the genus, but in our ignorance of the tetraspores and of 

 the early stages of the cystocarps the position of the present species 

 can be only provisional. In its habit our plant is narrower and 

 thinner than authentic specimens of P. rigida. It resembles the 

 plate of P. Maillardi in the Notes sur 1' lie de la Reunion, in several 

 respects, but that species is not so plainly dichotomous as ours, and, if 

 one can judge by one of the figures, there is a midrib, which is, 

 however, not at all prominent. 

 Harvard University. 



SHORT ARTICLES. 



New Localities for Rare Californian Plants. — Sparga- 

 nium Greenii, Morong, is abundant at Lake Merced, San Francisco, 

 It has heretofore been known only from Olema, Marin County, where 

 Professor Greene originally collected the species. 



Phlox adsurgens, Torrey. Mrs. W. J. Stringer recently collected 

 this species in Seiad Valley, Siskiyou County. While common in 

 Oregon it has not previously been reported from California. 



