| 2014 | "Scouleria siskiyouensis (scouleriaceae), a new rheophytic moss endemic to southern Oregon, USA" in Madrono |
| 2011 | "Review of Moss Flora of Central America. Part 3. Anomodontaceae—Symphyodontaceae, Monographs in Systematic Botany, Vol. 117" in The Bryologist |
| 2011 | "Orthotrichum mazimpakanum sp. nov. and O. anodon (Orthotrichaceae), two similar species from California" in The Bryologist |
| 2010 | "Fissidens minutifrons (Fissidentaceae), a new rheophilous species from Ecuador" in The Bryologist |
| 2009 | "Homalothecium californicum (Brachytheciaceae), a New Endemic Species to the California Floristic Province, Pacific Coast of North America" in The Bryologist |
| 2009 | "Review of Hepaticae and Anthocerotae of Great Himalayan National Park and Its Environs (HP), India" in Taxon |
| 2009 | "Review of The Illustrated Moss Flora of Antarctica" in Taxon |
| 2009 | "Review of Bryophyte Biology" in Systematic Biology |
| 2008 | "Bryophyte flora of the Huon Peninsula, Papua New Guinea. LXXI. Merrilliobryum (Myriniaceae, Musci)" in Annales Botanici Fennici |
| 2008 | "Identification, distribution, and family placement of the pleurocarpous moss bestia longipes" in Madrono |
| 2007 | "Bryophyte flora of the Huon Peninsula, Papua New Guinea. LXX. Sematophyllaceae (Musci) 1. Acanthorrhynchium, Acroporium, Clastobryophilum, Pseudopiloecium, Radulina and Trichosteleum" in Annales Botanici Fennici |
| 2005 | "Bryophyte flora of the Huon Peninsula, Papua New Guinea. LXIX. Preliminary report on the Sematophyllaceae (Musci), with nomenclatural notes" in Annales Botanici Fennici |
| 2004 | "Constributions toward a bryoflora of California: I. A Specimen-based catalogue of mosses" in Madrono |
| 2004 | "Constributions toward a bryoflora of California: II A key to the mosses" in Madrono |
| 2004 | "Orthotrichum kellmanii (Bryopsida, Orthotrichaceae), a Remarkable New Species from the Central Coast of California" in The Bryologist |
| 2002 | "Review of Moss Flora of China, English Version, Volume 1. Sphagnaceae through Leucobryaceae and Moss Flora of China, English Version, Volume 2. Fissidentaceae: Ptychomitriaceae" in The Bryologist |
| 2001 | "Review of Mosses and Other Bryophytes: An Illustrated Glossary" in Taxon |
| 2001 | "Review of The Liverwort Flora of Antarctica" in Taxon |
| 2000 | "Review of The Liverwortflora of the British Isles" in Taxon |
| 1999 | "Bryophyte flora of the Huon Peninsula, Papua New Guinea. LXVII. Amphidium (Rhabdoweisiaceae, Musci)" in Annales Botanici Fennici |
| 1999 | "Bryophyte flora of the Huon Peninsula, Papua New Guinea. LXVI. Meesiaceae (Musci), with lists of boreal to temperate disjunct, bipolar, and widely spread species in New Guinea" in Annales Botanici Fennici |
| 1999 | "Review of Pleurocarpous Mosses of the West Indies" in The Bryologist |
| 1998 | "A Re-Evaluation of Orthotrichum euryphyllum" in The Bryologist |
| 1998 | "Orthotrichum shevockii (Orthotrichaceae), a New Moss Species from the Southern Sierra, California" in The Bryologist |
| 1996 | "Bryophyte flora of the Huon Peninsula, Papua New Guinea. LVII. Fleischerobryum and Philonotis (Bartramiaceae, Musci)" in Acta Botanica Fennica |
| 1996 | "Bryophyte flora of the Huon Peninsula, Papua New Guinea. LVIII. Hypnodendron (Hypnodendraceae, Musci)" in Acta Botanica Fennica |
| 1996 | "Arevision of Californian Porella (Hepaticae)" in Annales Botanici Fennici |
| 1990 | "Bryophytes in perennially moist forests of Papua New Guinea: ecological orientation and predictions of disturbance effects" in Botanical Journal of the Linnean Society |
| 1990 | "Description of Bryolawtonia Norris & Enroth (Thamnobryaceae), with Observations on the Genus Bestia" in The Bryologist |
| 1990 | "Bryophyte flora of the Huon Peninsula, Papua New Guinea. XXXIII. Leskeaceae and Fabroniaceae (Musci) plus corrigenda and addenda to previous papers" in Annales Botanici Fennici |
| 1988 | "Variation in cytotoxicity and antitumor activity among samples of the mossClaopodium crispifolium (Thuidiaceae)" in Economic Botany |
| 1988 | "Bryophyte flora of the Huon Peninsula, Papua New Guinea. XXIV. Andreaeaceae, Archidiaceae, Seligeriaceae, and Ditrichaceae (Musci)" in Annales Botanici Fennici |
| 1988 | "Bryophyte flora of the Huon Peninsula, Papua New Guinea. XXV. Campylopodiella (Dicranaceae, Musci)" in Annales Botanici Fennici |
| 1988 | "Bryophytes from Frieda River, East and West Sepik Provinces, Papua New Guinea. III. Syrrhopodon curticancellinatus, species nova (Calymperaceae)" in Annales Botanici Fennici |
| 1987 | "Bryophyte flora of the Huon Peninsula, Papua New Guinea. XX. Fissidentaceae, Mitteniaceae, Phyllodrepaniaceae, Phyllogoniaceae and Sorapillaceae (Musci)" in Annales Botanici Fennici |
| 1986 | "Mosses, Liverworts, and Hornworts Screened for Antitumor Agents" in Economic Botany |
| 1985 | "Bryophytes from Frieda River, East and West Sepik Provinces, Papua New Guinea" in Anales Botanici Fennici |
| 1984 | "Bryophyte flora of the Huon Peninsula, Papua New Guinea. IV. Anomobryum, Bryum and Rhodobryum (Bryaceae, Musci)" in Annales Botanici Fennici |
| 1984 | "Bryophyte flora of the Huon Peninsula, Papua New Guinea. IV. Anomobryum, Bryum and Rhodobryum (Bryaceae, Musci)" in Annales Botanici Fennici |
| 1983 | "Bryophyte flora of the Huon Peninsula, Papua New Guinea, I. Study area and its bryological exploration" in Annales Botanici Fennici |
| 1983 | "Bryophyte flora of the Huon Peninsula, Papua New Guinea. II. Mniaceae (Musci)" in Annales Botanici Fennici |
| 1981 | "The Rediscovery of Rhabdodontium buftonii (Broth. & Geh. in Broth.) Broth" in The Bryologist |
| 1981 | "Review of Mosses of South Australia" in The Bryologist |
| 1981 | "Stoneobryum, a New Genus of Orthotrichaceae from South Africa and Southern Queensland" in The Bryologist |
| 1981 | "Diphyscium chiapense, a New Species from Southern Mexico" in The Bryologist |
| 1981 | "Splachnobryum limbatum sp. nov. from San Cristobal, Solomon Islands" in The Bryologist |
| 1979 | "The Systematic Position of Bryobrothera crenulata" in The Bryologist |
| 1978 | "Review of Prodromus Florae Muscorum Polynesiae" in The Bryologist |
| 1977 | "Review of The Mosses of Southern Australia" in The Bryologist |
| 1977 | "Review of Mosses of the Society Islands" in The Bryologist |
