~590 Evans: REPORT ON THE HEPATICAE OF ALASKA 
species, while Schiffner* has given a full account of its more 
important forms. 
24. PLAGIOCHILA ASPLENIOIDES (L.) Dumort. 
On damp rocks, soil, and logs. Augustine Bay (544); Hidden 
Ialet (60); Lake Bay (205); Mitrofania Bay (Rigg 1219 in part); 
Port Alice (724, 728 in part); Shipley Bay (767, 778); St. John 
Harbor (230, 246); Swifts Cannery (691); Tam Gas Harbor (730). 
Previously reported by Coville (2) and the writer (3, p. 305; 4, 
p. 131). 
25. FPlagiochila alaskana sp. nov. 
On logs. Nichols Bay (392 mostly, 399 mostly). No. 399 
may be designated the type. The accompanying species are 
Metzgeria conjugata (mixed with both numbers), Diplophyllum 
albicans (mixed with 392), and Frullania nisquallensis (mixed with 
399). : 
Yellowish or brownish green, not glossy, growing in compact 
tufts: stems mostly 2-3 cm. long and about 0.15 mm. in diameter, 
rigid, ascending, simple or sparingly and irregularly branched, the 
branches all intercalary, obliquely spreading, similar to the stems: 
rhizoids sometimes present near the base: leaves alternate, more or 
less imbricated, spreading at an angle of 45 degrees or less, postic- 
ally secund and often deflexed in the outer part, more or less 
convex, ovate, mostly I-1.4 mm. long (from middle of base to apex) 
and 0.7 mm. wide, long-decurrent antically, less decurrent postic- 
ally, the decurrent portions narrow and the line of attachment 
strongly arched; antical margin revolute to about the middle, 
straight or slightly outwardly curved (on explanate leaves), entire 
to about the middle, sharply dentate or ciliate-dentate in the 
outer part; postical margin more strongly outwardly curved, 
sometimes slightly dilated toward the base, sharply dentate or 
ciliate-dentate; apex broad and rounded with teeth like those on 
the postical margin; total number of teeth mostly twenty to 
twenty-five, unequal, three to six cells long, one to three cells 
wide at the base; leaf cells plane, averaging 14 u in the apical 
portion, 21X14 in the middle, and 4oX14 u at the base, walls 
more or less thickened with well-developed triangular trigones, 
sometimes with bulging sides, and rare intermediate thickenings, 
coalescence between thickenings frequent, especially in median 
and basal regions, cuticle smooth: underleaves very minute: 
* Ber. naturw.-med. Ver. Innsbruck 31 (Beilage): 22-31. 1908. 
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