Eckenwalder, J.E. 1980. The taxonomy of the West 

 Indian cycads. J. Arnold Arbor. 61:701-722. 



Egolf. D.R., and A.O. Andrick. 1978. The 

 Lagerstroemia handbook/checklist. American Associa- 

 tion of Botanical Gardens and Arboreta, Las Cruces, 



NM. 



Eisenbeiss, G.K., and T.R. Dudley. 1973. Interna- 

 tional checklist of cultivated Ilex. Part 1 . Ilex opaca. 

 National Arboretum Contribution Number 3. U.S. 

 Department of Agriculture, Washington, DC. 



Farr, E.R.. J.A. Leussink. and F.A. Stafleu. 1979. 

 Index nominum generieorum (Plantarum). Vols. 1-3. 

 Bohn, Scheltema, and Holkema, Utrecht. 



Fernald, M.L. 1950. Gray's manual of botany. 8th ed. 

 American Book Co., New York. 



Flink, K.E., and B. Hylmo. 1966. A list of series and 

 species in the genus Cotoneaster. Bot. Not. 

 119(3):445-463. 



Fogg, J.M., Jr.. and J.C. McDaniel, eds. 1975. Check- 

 list of the cultivated magnolias. American Horticul- 

 tural Society, Mt. Vernon, VA. 



Galle, F.C. 1987. Azaleas. Timber Press, Portland, 

 OR. 



Gensel, W.H. 1988. Rhododendron subsection 

 Caroliniana. Rhododendron Notes and Records 2:1- 

 11. 



Gleason, H.A. 1952. The new Britton and Brown 

 illustrated flora of the northeastern United States and 

 adjacent Canada. 3d ed. 3 vols. New York Botanical 

 Garden, New York. 



Godfrey, R.K. 1988. Trees, shrubs, and woody vines 

 of northern Florida, and adjacent Georgia and Ala- 

 bama. University of Georgia Press, Athens. 



Graves, A.H. 1956. Illustrated guide to trees and 

 shrubs. Harper and Row, New York. 



Green, P.S. 1965. Studies in the genus Jasminum III. 

 The species in cultivation in North America. Baileya 

 13(4):137-172. 



Greuter, W.. ed. 1988. International code of botanical 

 nomenclature. Koeltz Scientific Books, Koenigstein, 

 Germany. 



Halfacre, R.G., and A.R. Shawcroft. 1975. Carolina 

 landscape plants. 2d ed. University of North Carolina 

 Press, Raleigh. 



Hansel. D.E., ed. 1970. Handbook of hollies. 

 Hort. Mag. 49(4): 150-334. 



Am. 



Hardin, J.W. 1957. A revision of the American 

 Hippocastanaceae II. Brittonia 9(4): 173-195. 



Haworth- Booth, M. 1959. The hydrangeas. Con- 

 stable Publishers, London. 



Hopkins, M. 1942. Cercis in North America. 

 44:193-211. 



Rhodora 



Hu. S.-Y. 1954-56. A monograph of the genus 

 Philadelphus. J. Arnold Arbor. 35(4):275-333; 

 36(11:52-109: 36(41:325-368: 37(1): 15-90. 



Hume. H.H. 1953. Hollies. Macmillan Co., New York. 



Hume, H.H. 1955. Camellias in America. J. Horace 

 McFarland Co., Harrisburg, PA. 



Isely, D. 1973. Leguminosae of the United States: I. 

 Subfamily Mimosoideae. Mem. N.Y. Bot. Gard. 

 25(11:1-152. 



Jaynes. R.A. 1988. Kalmia. The laurel book II. 

 Timber Press, Portland OR. 



Jefferson, R.M. 1970. Crabapples of documented 

 authentic origin. National Arboretum Contribution 

 Number 2. U.S. Department of Agriculture, Washing- 

 ton. DC. 



Jefferson, R.M. 1976. Differences between Ligustrum 

 japonicum and L. lucidum. Amer. Nurseryman 

 144(1):22. 



Jefferson, R.M. , and A.E. Fusonie. 1977. The Japa- 

 nese flowering cherry trees of Washington, D.C. 

 National Arboretum Contribution Number 4. U.S. 

 Department of Agriculture, Washington, DC. 



Jones, G.N. 1946. American species of Amelanchier. 

 111. Biol. Monogr. 20(2). 



Jones, G.N. 1968. Taxonomy of American species of 

 linden (Tiliaj. 111. Biol. Monogr. 39. 



Judd. W.S. 1984. A taxonomic revision of the Ameri- 

 can species of Agarista (Ericaceae). J. Arnold Arbor. 

 65(31:255-342. * 



Kelsey, H. P., and W.A. Dayton. 1942. Standardized 

 plant names. 2d. ed. J. Horace McFarland Co., 

 Harrisburg, PA. 



Kobuski. C.E. 1951. Theaceae in the United States. 

 J. Arnold Arbor. 32:123-138. 



Krussmann, G. 1981. The complete book of roses. 

 Timber Press, Portland, OR. 



Krussmann, G. 1984. Manual of cultivated broad- 

 leaved trees and shrubs. 3 vols. Timber Press, 

 Portland, OR. 



Hara, H. 1983. A revision of Caprifoliaceae of Japan. 

 Ginkgoana 5. 



327 



