99 RICCIACEAE 
9. Transverse section near the middle of a principal segment of another plant, 
23. 
IO. From same segment as fig. 9, but near the base, Х 23. 
II. Epidermal cells from near the thallus-apex, Х 225. 
I2. Epidermis from an older part of the thallus, showing remnants of the primitive 
surface-layer, 225. 
13. Marginal trichomes, 53. 
14. Transverse section of thallus, 53. 
15. Spore, showing the inner (plane) faces, 305. 
16. Spore, showing the outer (convex) face, Х 305. 
Figs. I, 2, 9, 10 and 12 from no. 530, Clarendon Heights, San Francisco ; fig. 
3. from Mr. Austin’s original, ex herd. Pearson ; figs. 11, 13, 14-16 from material 
collected at Fruit Vale, by Miss Edith 5. Byxbee; figs. 2 and 4-14 from material fixed 
with 1% chromic acid and preserved in alcohol. 
4. КІССІА GLAUCA L. pro parte maxima Sp IE ТЕО 1755 
Differs from R. Californica chiefly in the normal absence of 
cilia, the presence of cylindrical or conico-cylindrical antheridial 
ostioles projecting about .1 mm. above the surface of the thallus, 
and in having the meshes of the outer face of the spore 10-15 / in 
width. 
Little Bear Valley, San Bernardino Mts. (S. B. Parish, no. 
1670, Aug. 1884, in herb. Underwood); near Mineral King, 
Tulare Co. (Coville and Funston, Death Valley Expedition, no. 
1509, Aug. 6, 1891). < 
Mr. Parish’s plant differs from the larger forms of the European 
К. glauca in nothing, we think, but the rather smaller meshes of 
the convex face of the spore, which, in this specimen, are com- 
monly only about то шіп width. Тһе specimen from Tulare Co., 
while exhibiting the ostioles of А. glauca, has now and then rudi- 
mentary cilia toward the thallus-apex and would doubtless be 
identified with the Riccia subinermis Lindb. of Europe by those 
who maintain this as a species. | 
It may be remarked that according to the drawings of Herr | 
Waldner* one might gain the impression that the ostioles of Riccia 
glauca are scarcely elevated above the general surface of the thallus, | 
but it is probable that the antheridium in even the most advanced 
stages represented by Waldner was still far from maturity. The © 
“ Antheridienstifte” of А. glauca are described by Limpricht} as | 
“‘walzenformig vortretend”’ and we find them thus (.1 mm. long) | 
in С. & R. Hep. Eur. по. 646. ^ 
* Leitgeb, Untersuch. über d. Leberm. Heft 4. #. 2. f. 4-6. 
f Cohn, Krypt.-Fl. v, Schles. І: 349. 1877. ; 
