— 57 — 
female receptacle; in Clevea there is no rhizoid-furrow, in Sauteria a single one 
is present. In Clevea the receptacle is dorsal on a thallus branch and does not 
limit its growth; in Sauteria it is terminal and brings the growth of the branch 
to an end. An important distinction between Clevea hyalina and Sauteria alpina 
is found in the paleae associated with the female receptacles. In the Clevea 
there are few or no slime-papillae on the paleae; in the Sauteria the papillae 
are very numerous. 1 
3. Plagiochasma Muenchianum Steph. Sp. Hepat. 6: 9. 1917. 
This species was based on specimens collected by G. Munch at San Cristobal, 
Chiapas, Mexico. From a study of these specimens several years ago, 2 before 
the species had been published, the writer reached the conclusion that they 
represented a form of P. crenulatum Gottsche. It is therefore suggested that 
P. Muenchianum be placed among the synonyms of P. crenulatum. 
4. Grimaldia pilosa (Hornem.) Lindb. Muse. Scand. 1. 1879. Marchantia 
pilosa Hornem. FI. Dan. 8: 7. pi. 1426. 1810. Duvalia pilosa Lindb. Not. F. 
et FI. Fenn. 9 : 280. 1868. Neesiella pilosa Schiffn. Hedwigia 47 : 314. 1908. 
Collected in June, 1893, on Cold Creek Hill, Yukon River, Alaska, by F. 
Funston (No. 94). This specimen was reported by the writer some time ago 
under the incorrect name G. fragrans (Balb.) Corda; 3 since, however, the thallus 
shows large air chambers the plant clearly belongs to G. pilosa, and G. fragrans 
should no longer be included among the species known from Alaska. G. pilosa 
is an arctic and alpine species which occurs at various scattered localities in 
northern Europe and Asia. In North America it is known from Greenland, 
Quebec and Vermont, as well as from Alaska. 
In the second paper of this series 4 G. pilosa is included in the genus Neesiella, 
following the example of Schiffner, but it is shown that the reasons for separating 
Neesiella from Grimaldia are not very convincing, being based simply on differ- 
ences in the structure of the thallus. Since the related genus Asterella shows 
equally great differences, it is now suggested that Neesiella be again combined 
with Grimaldia. As thus enlarged the genus is represented in North America 
by the following species: G. calif or nica Gottsche, G. fragrans, G. pilosa, and 
G. rupestris (Nees) Lindenb., the last species being the type of the genus Neesiella. 
5. Petalophyllum Ralfsii (Wils.) Nees & Gottsche; Lehmann, Pug. 
Plant. 8: 30 (in obs ). 1844. Diplolaena Lyellii a lamellata Nees, Naturg. Europ. 
Leberm. 3 : 345. 1838. Jungermannia Ralfsii Wils.; Sowerby, Engl. Bot. Suppl. 
4 : pi. 2874. 1843. Petalophyllum lamellatum Lindb. Not.-F. et FI. Fenn. 13 : 
390. 1874 Fossombronia corbulaeformis Trabut, Rev Bryol. 13 : pi. 2, f. 9-14. 
1886 (no description); Battandier & Trabut, Atlas FI. d’ Alger 7. pi. 2,f. 9-14. 
1886. 
1 See Solms-Laubach, Bot. Zeit. 57 1 : 19. 1899. 
2 Bull. Torrey Club 42: 289, 292. 1915. 
3 Proc. Washington Acad. 2: 290. 1900. 
4 Bryologist 14: 84. 1911. 
