302 rnliursifn of (UiJifornia J'uhlications in Bofaiiii [Vou 7 



us(|U(' iul Icvitci- riisiroriiiihiis, olitiisis, in pedieellis ciirtis suifiiltis 

 a^irrcirjitis aiit in filanientis repentibus prope snperficiem hospitis 

 sessilibus, 2'->-'A')fi longis, 4.5-5.5/a latis; loculis uniseriatis, septis 

 |)lciMiin(|U(' (ililir|nis. 



Growing on (Uunagloia Andersonii (Farlow) S. and G., in company 

 witli Slrcbloncma anonialum and S. Johnstonae. San Pedro, Cali- 

 fornia. Type. :\Irs. II. D. Johnston, no. llGa (Herb. Univ. Calif., 

 no. 94663), August. 



While studying the material of Nemalion Andersonii Farlow. col- 

 lected by ]\Irs. II. 1). Johnston at San Pedro, California, in 1899 and 

 deposited in the Ilerbariuiu of the University of California under 

 no. 94663. some specimens of p]ctocarpaceae were incidentally observed. 

 ^Yllen we came to study our material of this family, these specimens 

 were given careful scrutiny with the result that three species new to 

 science were detected on a single specimen of the host, viz., Strehlonema 

 corymhiferum, S. anomalum, and S. Johnstonae, all of which are pre- 

 sented for the first time in this paper. 



The habit of each and the size of all the parts are so characteristic 

 that, notwithstanding their intimate association on the same host, they 

 can readih^ be distinguished. S. corymhiferum is the most delicate of 

 the three. The very frequent grouping of the gametangia into corymb- 

 like clusters is one of the most prominent distinguishing characters of 

 the species. Other species of this genus are as small or even smaller. 

 In size of parts, somewhat in habit and in habitat, it resembles S. 

 mimitissimum Saunders, found growing at Sitka. Alaska, on "Lieh- 

 mnnnia sp." (Saunders, 1901, p. 416). 



Streblonema anomalum sp. nov. 



Plate 43, figures 1-3 



Frondibus microscopicis, plus miinisve confluentibus; filanientis 

 partis prostratae inter cellulas hospitis penetrantibus moderate et 

 irregulariter ramosis. multe contortis, usque ad 16/x diam. ; filanientis 

 erectis siniplicilms. plerumque cylindricis, pro parte olitusis et pro 

 parte pilifcris, 200-250/^ longis, ultra superficiem hospitis exten- 

 dentibus; filamentis piliferis sparsis, e filanientis repentibus oriundis; 

 cellulis filamentorum repentium plus minusve in partibus senilibus 

 1-2-plo lougitudiualiter divisis. filamentum polysiphoiioum produeent- 

 ibus. 18-24/j. diaiii.; cellulis alteris I'orma leviter irregularihus. 8-1 Iju, 

 diam.. admodum ad dissepimenta leviter constrictis; cellulis fila- 

 mentorum ereetorum cylindricis. 8-9ju, diam., quadratis; chromato- 

 phoris singulis, taeniatis, in filanientis ereetis continuis. in filamentis 

 repent ilms i)lus minusve interruptis; zoosporangiis ellipsoideis, ovoideis 



