ntil their retirement, “Ted” and his wife Leena were botanists at Finnish Natural History Museum in Helsinki. In 1961 at the invitation of Yorke Edwards, they made a historic collecting trip to Wells Gray Park, later publishing their respective findings in a series of papers that gave the Clearwater Valley international prominence in the botanical community. At Ted’s encouragement, many other European botanists have visited the park over the decades, helping to make Wells Gray one of the floristically better-known parks in the BC Parks system. You can link to a biography of these two botanists here. Twenty-seven publications and reports prepared by Ted and Leena incorporate fieldwork conducted in the Clearwater Valley:
Ahti, T. 1962. Ecological investigations on lichens in Wells Gray Provincial Park with special reference to their importance to mountain caribou. Unpublished Report, B.C. Parks, Victoria. 69 pages.
Ahti, T. 1969. Notes on brown species of Parmelia in North America. The Bryologist 72: 233–239.
Ahti, T. 1978. Two new species of Cladonia from western North America. The Bryologist 81: 334–338.
Ahti, T. and R. Fagerstén. 1967. Mosses of British Columbia, especially Wells Gray Provincial Park. Annales Botanici Fennici 4: 422–440.
Ahti, T., I.M. Brodo and W.J. Noble. 1987. Contributions to the lichen flora of British Columbia, Canada. Mycotaxon 28: 91–97.
Ahti, T. and R. Fagerstén. 1967. Mosses of British Columbia, especially Wells Gray Provincial Park. Annales Botanici Fennici 5: 169–211.
Brodo, I. M., W. J. Noble, T. Ahti and S. Clayden. 1987. Lichens new to North America from the flora of British Columbia, Canada. Mycotaxon 28: 99–100.
Goward, T. and T. Ahti. 1983. Parmelia hygrophila, a new lichen species from the Pacific Northwest of North America. Annales Botanici Fennici 20: 9–13.
Goward, T. and T. Ahti. 1992. Macrolichens and their zonal distribution in Wells Gray Provincial Park and its vicinity, British Columbia, Canada. Acta Botanica Fennica 147: 1–60.
Goward, T. and T. Ahti. 1997. Notes on the distributional ecology of Cladonia (lichenized ascomycetes) in temperate and boreal western North America. Journal of the Hattori Botanical Laboratory 82: 143–155.
Goward, T., T. Ahti, J.A. Elix and T. Spribille. 2010. New species in the Hypogymnia metaphysodes group from western North America. Botany 88: 345–351.
Goward, T., T. Spribille, T. Ahti and C.J. Hampton-Miller. 2012. Four new sorediate species in the Hypogymnia austerodes group (lichens) from northwestern North America, with notes on thallus morphology. The Bryologist 115: 84–100.
Hämet-Ahti, L. 1965a. Vascular plants of Wells Gray Provincial Park and its vicinity, in eastern British Columbia. Annales Botanici Fennici 2: 138–164.
Hämet-Ahti, L. 1965b. Notes on the vegetation zones of western Canada, with special reference to the forests of Wells Gray Park, British Columbia. Annales Botanici Fennici 2: 274–300.
Hämet-Ahti, L. 1965c. Luzula piperi (Cov.) M.E. Jones, an overlooked woodrush in western North America and eastern Asia. Aquilo Ser. Bot. 3: 11–21.
Hämet-Ahti, L. 1971a. A synopsis of the species of Luzula, subgenus Anthelaea Griseb. (Juncaceae) indigenous in North America. Annales Botanici Fennici 8: 368–381.
Hämet-Ahti, L. 1972. Notes on Ustilago vuijckii Oudem. and Beijer. on some Luzula species in North America. Syesis 5: 83–85.
Hämet-Ahti, L. 1973. Notes on the Luzula arcuata and L. parviflora groups in eastern Asia and Alaska. Annales Botanici Fennici 10: 123–130.
Hämet-Ahti, L. 1975. Additional notes on Luzula subcongesta and L. parviflora (Juncaceae) in North America. Annales Botanici Fennici 12: 27–29.
Hämet-Ahti, L. 1978. Timberline meadows in Wells Gray Park, British Columbia, and their comparative geobotanical interpretation. Syesis 11: 187–211.
Hämet-Ahti, L. 1979. The dangers of using the timberline as the “zero line” in comparative studies on altitudinal vegetation zones. Phytocoenologia 6: 49–54.
Hämet-Ahti, L. 1980. Juncus alpinoarticulatus: the legitimate name for Juncus alpinus. Annales Botanici Fennici 17: 341–342.
Hämet-Ahti, L. 1986. North American races of Juncus alpinoarticulatus (Juncaceae). Annales Botanici Fennici 23: 277–281.
Noble, W.J., T. Ahti, G.F. Noble and I.M. Brodo. 1987. A second checklist and bibliography of the lichens and allied fungi of British Columbia. Syllogeus 61: 1–95.
Otto, G.F. and T. Ahti. 1967. Lichens of British Columbia, preliminary checklist. Department of Botany, University of British Columbia, Vancouver. 40 pp.
Piercey-Normore, M.D., T. Ahti and T. Goward. 2010. Phylogenetic and haplotype analyses of four segregates within Cladonia arbuscula s. l. Botany 88: 397–408.
Tønsberg, T. and T. Ahti. 1980. Cladonia umbricola, a new lichen species from NW Europe and western North America. Norwegian Journal of Botany 27: 307–309.
Velmala, S., L. Myllys, P. Halonen, T. Goward and T. Ahti. 2009. Molecular data show that Bryoria fremontii and B. tortuosa (Parmeliaceae) are conspecific. The Lichenologist 41: 231–242.