Clyde L. Calvin


Contact Information

Telephone: (503) 701-8145
Address: University and Jepson Herbaria
1001 Valley Life Sciences Building #2465
Office #1080
University of California, Berkeley
Berkeley, CA 94720-2465 USA


Postdoctoral Fellowship, 1966-67, University of California, Santa Barbara
Ph.D. 1966, Botany, University of California, Davis
M.S. 1962, Agronomy, Purdue University
B.S. 1960, Agronomy, Washington State University

Positions Held

Research Assoc., Rancho Santa Ana Bot. Gard., Claremont, CA, 2006–present
Professor Emeritus of Biology, Portland State University, Portland, OR 1999–2006
Professor of Biology, Portland State University, 1983–99
Executive Director, Berry Botanic Garden, Portland, OR, 1986–87
Assoc. Professor of Biology, Portland State University, 1973–83
Assist. Professor of Biology, Portland State University, 1969–73
Assist. Professor of Biology, Oregon College of Education, 1968–69
Assist. Professor of Biology, California State University, Long Beach, 1967–68.
Erskine Fellow, University of Canterbury, Christchurch, NZ, 1992
Visiting Professor of Biology, University of Utah, Salt Lake City, 1984
Visiting Professor of Botany at Virginia Tech (VPI&SU), Blacksburg, VA, 1976


Books Authored
Briggs, G. and C.L. Calvin. 1987. Indoor Plants. John Wiley and Sons, New York. 516 pp.
Calvin, C.L. and D.M. Knutson. 1983. Modern Home Gardening. John Wiley and Sons, New York. 545 pp.
Articles Published
Wiens, D. and C.L. Calvin. 2011. Two epiparasitic species of Phoradendron (Viscaceae) from Honduras: one new and for the other a range extension and host determination. Aliso 29: 119–123.
Schmid, R., C. L. Calvin, and C. A. Wilson. 2011. Haustorial system structure in Phoradendron californica confounds the current classification. Aliso 29: 13–20.
Calvin, C. L. and C. A. Wilson. 2009. Epiparasitism in Phoradendron. Aliso 27: 1–12.
Wilson, C. A. and C. L. Calvin. 2006. An origin of aerial branch parasitism in the mistletoe family, Loranthaceae. American Journal of Botany 93: 787–796.
Calvin, C. L. and C. A. Wilson. 2006. Comparative morphology of epicortical roots in Old and New World Loranthaceae with reference to root types, origin, growth, branching patterns and potential for clonal growth. Flora 201: 51–64.
Wilson, C.A. and C.L. Calvin. 2006. Character divergences and convergences in canopy-dwelling Loranthaceae. Botanical Journal of the Linnean Society 150: 101–113.
Wilson, C. A. and C. L. Calvin. 2003. Development, taxonomic significance and ecological role of the cuticular epithelium in the Santalales. IAWA Journal 24: 129–138.
Ruhland, B.M. and C.L. Calvin. 2001. Morphological aspects of seedling establishment in four temperate Phoradendron species. Madrono 48: 79–89.
Fineran, B.A. and C.L. Calvin. 2000. Transfer cells and flange cells in sinkers of Phoradendron macrophyllum (Viscaceae) and their novel combination. Protoplasma 211: 76–93.
Akhalkatsi, M., M. Pfauth and C.L. Calvin. 1999. Structural aspects of ovule and seed development and nonrandom abortion in Melilotus officinalis (Fabaceae). Protoplasma 208: 211–223.
Calvin, C.L. and C.A. Wilson. 1998. Comparative morphology of haustorial systems in the African Loranthaceae. In: Polhill, R. and D. Wiens (eds). Mistletoes of Africa. The Royal Botanic Gardens, Kew, UK. Pp. 17–36.
Calvin, C.L. 1997. Host-formed tyloses in vessels of the mistletoe Phoradendron (Viscaceae). IAWA Journal 18: 117–126.
Calvin, C.L. and C.A. Wilson. 1996. Anatomy of the dwarf mistletoe endophytic system. In: F.G. Hawksworth and D. Wiens (eds.). Dwarf Mistletoes: Biology, Pathology and Systematics. USDA Forest Service. Washington, D.C. Pp. 113–122.
Wilson, C. A. and C. L. Calvin. 1996. Anatomy of the dwarf mistletoe shoot system. In: F. G. Hawksworth and D. Wiens (eds). Dwarf mistletoes: Biology, Pathology, and Systematics. USDA, Forest Service, Washington, D.C. Pp. 95–111.
Calvin, C.L. and C.A. Wilson. 1995. Relationship of the mistletoe Phoradendron macrophyllum (Viscaceae) to the wood of its host. IAWA Journal 16: 33–45.
Calvin, C.L. 1995. Structural/functional specializations that allow mistletoes to parasitize other plants. Yearbook of Science and Technology, McGraw-Hill, NY. Pp. 308–309.
Calvin, C.L., C.A. Wilson, and G. Varughese. 1991. Development of longitudinal strands of Phoradendron juniperinum (Viscaceae) in shoots of Juniperus occidentalis. Annals of Botany 76: 153–161.
Wiens, D., D.I. Nickrent, C.I. Davern, C.L. Calvin, and N. Vivrette. 1989. Developmental failure and loss of reproductive capacity in the rare paleoendemic shrub Dedeckera eurekensis. Nature 338: 65–67.
Wiens, D., C.L. Calvin, and C.L. Davern.1988. Exceptionally low seed set in Dedeckera eurekensis: Is there a genetic component of extinction? In: Plant Biology of Eastern California. University of California White Mountain Research Station. Los Angeles, CA. Pp. 19–29.
Wiens, D. and C.L. Calvin. 1987. Epiparasitism in mistletoes. The Golden Bough 9: 2-4.
Wiens, D., C.L. Calvin, C.A. Wilson, C.I. Davern, D. Frank and S.R. Seavey. 1987. Reproductive success, spontaneous embryo abortion, and genetic load in flowering plants. Oecologia 71: 501–509.
Alosi, M.C. and C.L. Calvin. 1985. The ultrastructure of dwarf mistletoe (Arceuthobium spp.) sinker cells in the region of the host secondary vasculature. Canadian Journal of Botany 63: 889–898.
Alosi, M.C. and C.L. Calvin. 1984. The morphology of the endophytic system of Arceuthobium spp. In: Hawksworth, F.G. and R.F. Scharpf, (tech. coords.) Biology of dwarf mistletoes. USDA-FS General Technical Report RM-111. 131 pp.
Calvin, C.L., F.G. Hawksworth, and D.M. Knutson. 1984. Phloem in Arceuthobium globosum (Viscaceae). Botanical Gazette 145: 461–464.
Calvin, C.L. and R.L. Null. 1977. On the development of collenchyma in carrot. Phytomorphology 27: 323–331.
Calvin, C.L. 1971. Anatomy of the aerial epidermis of the mistletoe, Phoradendron. Botanical Gazette 131: 62-74.
Tinnin, R.O., C.L. Calvin, R.L. Null, and R.W. Cowles. 1970. Observations on the establishment of seedlings of Phoradendron californicum on Prosopis juliflora. Phytomorphology 21: 313–320.
Calvin, C.L. 1967. Anatomy of the endophytic system of the mistletoe, Phoradendron flavescens. Botanical Gazette 128: 117–137.
Calvin, C.L. 1967. The vascular tissues and development of sclerenchyma in the stem of the mistletoe Phoradendron flavescens. Botanical Gazette 128: 35–39.
Calvin, C.L. 1966. Anatomy of mistletoe (Phoradendron flavescens) seedlings grown in culture. Botanical Gazette 127: 171-183.
Calvin, C.L. and J.J. McGrath. 1964. Starch grains misinterpreted as new cell organelles. Planta 62: 373–378.
Manuscripts In Preparation
Xylem tissue relationships in two Phoradendron epiparasites from Mexico (in prep. for Aliso).
Phloem tissue relationships in two Phoradendron epiparasites from Mexico (in prep. for American Journal of Botany).
Epiparasitism in mistletoes: novelty or pathway to speciation and diversification (in prep. for Botanical Review).