166 JUNGERMANNIACEAE 
Co.; near Cazadero (1170), Sonoma Co.; Ukiah (759) and ще 
(Miss Edith 5. Byxbee), Mendocino Со.; Blue Lake 9 : 
Deer Creek (1068, 1073, 1231), Humboldt Co.; Hay Fork (1109 
inity Co. 
+ xu from Kitchelos Lake, Washington (Roell, P ЕНИ 
—in herb. Stephani, Leipsic. Type duplicate in herb. 
oF Roellii is closely related to the forms of the w— 
Р. laevigata with obtuse dorsal lobes and subentire ventral lo : у 
and underleaves, as represented, for example, in Carrington a 
Pearson’s по. 275 Hep. Brit. Exsicc., from Scotland. This E 
pecially true of British Columbia specimens (Macoun : са i 
Yale, May, 1875; no. 63, near Victoria, May 30, 1893), an | 
our по. 1068. These latter differ, however, from P. laevigata 
the smaller, narrower, more pointed, and more strongly calcarate 
ventral lobes, and in the usually more slender fronds. They are 
forms like these, we take it, that have been referred by Mr. ыт. 
son * to P, laevigata, but in the predominating forms in Was Tm 
ton, Oregon, and California the plant is much less pre = 
laevigata, and we prefer to maintain Stephani’s species, and г. 
sociate with it the British Columbia specimens alluded to an ie 
no. 1068, even though, as must be admitted, they make в pc 
approach to certain conditions of the European plant. Perd 
occur only in our nos. 994 and 1231; they appear ю фу Е 
slightly from those borne by a specimen of P. laevigata эз 
Teneriffe, which we owe to the kindness of Matthew B. Slater, 
Еза., of Malton, England. 
PLATES 113 AND 114. PonELLA КОЕП. 
4. 4 plant, natural size. 
5. Portion of plant, ventral view, ` 12. 
6-8, Саше leaves, showing ventral lobes, X 23. 
9. Rameal leaf, ventral view, X 21. 
ranches, with bracts and mature perianths, Ж 12. 
14. Outline of cauline leaves, dorsal view, Х 12. 
15. Leaf-cells, Х 305. 
16 апа 17. Leaves, viewed dorsally, 12. 
ee м. ет Я 
List of Canadian Hepaticae, 7. 1890. 
Пао ЕН ЧЕЧИН, 
