Peristome of Diphyscium Foliosum (Hedw.) Mohr
Bryological Papers
Sphagnopsida. Bryopsida. Classification
Achrophyllum--a New Name for a Genus of Mosses
A Revision of the Genus Orthotrichum
The Genera of Orthotrichaceae
The Genus Seligeria in New Zealand
Orthotrichaceae Boreali-Americanae Exsiccatae
On Neotropical Orthotrichaceae
A Monograph of the Genus Muelleriella Dusén
Devon Island IBP/PT Project
Bryological Herbaria
A Comparative Study of Andreaea Acutifolia, A. Mutabilis, and A. Rupestris
A Taxonomic Revision and Phylogenetic Analysis of Grimmia and Schistidium (Bryopsida; Grimmiaceae) in China
Field Trip Two, Bryological and Lichenological
Biometric and Graphic Methods in Moss Taxonomy
Mosses, Lichens and Ferns of Northwest North America
The Genus Seligeria in North America
Compendium of Bryology