1916] Gilkey: A Revision of the Tuherales of California 341 



irregularly through hyphal tissue, irregularly globose-ellipsoid ; spores 

 yellowish at maturity, loos(4y and irregularly arranged in ascus, 

 globose, 14r-'[Sfji, very coarsely alveolate, angles of alveoli projecting 

 as thick, blunt spines -i/x long ; 3-4 alveoli across diameter of spore. 



''Under oak. Piedmont Park, Oakland, Calif., Apr. 4, 1903." 



No. 106, U. C. Col. Tijpe. N. L. Gardner. 

 "Mt. View Cemetery, Oakland, Calif., Jan., 1903." 



No. 110, U. C. Col. N. L. Gardner. 

 "U. C. Campus, Berkelev, Calif., Feb., 1905; Leona Heights, north of 

 Oakland, Calif., Feb., 1905 ; Berkelev Hills, Berkelev, Calif., Feb., 

 1905; Wild Cat Canvon, Berkeley, Calif., April 1, 1905." 



No. 278, U. C. Col. N. L. Gardner. 



Material under the three numbers mentioned above was examined 

 by Fischer who pronounced Nos. 106 and 278 identical and evidently 

 a new species, since they differed in larger ascocarp, smaller spores, and 

 absence of mycelial tuft at base, from the three previously described 

 species. No. 110, through its somewhat larger spores, approached 

 Hydnoholites cerehriformis Tul. in his opinion, perhaps being identi- 

 cal with it (letters of October 11, 1905, and March 27, 1909). He sug- 

 gested the name H. californicus for the first two, and tliis was later 

 published by him in Fedde, Reperiorium VII (1909), p. 194. 



Study of various specimens of No. 110, and careful comparison 

 with material under the Nos. 106 and 278, reveal the fact that while 

 the spores of the former are at times larger than those of the two 

 latter, this difference is not constant, and otherwise the plants of the 

 three collections seem identical. 



Aside from the characters mentioned by Fischer, our plants differ 

 from //. cerehriformis, as it is described, in shape of asci and thick- 

 ness of pseudoparenchymatous cortex, the foi-mer of this species being 

 given as less globose-ellipsoid, and the latter measuring 100-120/i.. H. 

 californicus differs from descriptions of H. Tulasnei Hesse in color, 

 narrower hyphae of internal tissue, shape and size of asci, and size 

 of ascocarp and spore, H. Tulasnei being described in these points as 

 follows: Surface of ascocarp rose-colored, changing to flesh color at 

 maturity; hyphae 10-14/x.; asci pear-shaped to egg-shaped, 70-100/a; 

 ascocarp 1 cm. in diam. ; spores 17-21/I.. Our species is debarred from 

 H. fallax Hesse, as described, by the absence of pseudoparenchymatous 

 tissue in the interior of the ascocarp. 



