PRICE, TAXACEAE THE GENERA OF TAXACEAE IN THE SOUTHEASTERN UNITED STATES' ROBERT A. PRICE2 TAXACEAE S. F. Gray, Nat. Arr. Brit. P1. 2: 222. 1821, "Taxideae," nom. cons. (YEW FAMILY) Evergreen dioecious (or rarely monoecious) trees or shrubs. Foliage leavesentire, linear to linear-lanceolate, spirally arranged (often apparently 2-ranked)[or opposite in Amentotaxus], short-petiolate, with 2 stomatal bands on theabaxial surface: resin canal single. abaxial to the vascular bundle (or absent inT'a.us, Pseudotaxus, and Austrotaxus). Wood without resin canals, axial woodparenchyma present or absent, helical thickenings present on the tracheid walls[apparently absent in Autstrotaxus]. Pollen cones (microsporangiate strobili)apparently simple, borne singly in the axils of foliage leaves [or compound and 'Prepared for the Generic Flora of the Southeastern United States, a long-term project made possiblethrough the support of National Science Foundation Grant BSR-8716834 (Norton G. Miller, principalinvestigator), under which this account was prepared, and BSR-8717333 (Carroll E. Wood, Jr..principal investigator). The 131st in the series, this paper follows the format established in the firstone (Jour. Arnold Arb. 39: 296-346. 1958) and continued to the present. The area covered by theGeneric Flora includes North and South Carolina. Georgia, Florida. Tennessee, Alabama. Mississippi,Arkansas, and Louisiana. The descriptions are based primarily on the plants of this area, withinformation about extraregional members of a family or genus in brackets. The references that I havenot verified are marked with asterisks. I thank Carroll Wood and Norton Miller for the opportunities afforded by participation in theGeneric Flora Project and for their guidance in the study. I am grateful to Rudolf Schmid forbibliographic assistance, to Paul Groff for critical reading of the manuscript, and to Robert Godfreyfor providing wild-collected material of Taxus floridana, on which the illustrations are based. TheCenter for Plant Conservation graciously provided photographs of Torreya taxifolia. Library andherbarium collections associated with Harvard University and the University of California. Berkeley,were consulted in this study, and 1 wish to thank the stafls of these institutions. The illustrations were drawn by Linda Vorobik under the supervision ofthe author. The illustrationsof Torreva taxifolia are based on living material from the University of Calitornia Botanical Garden,on seeds collected in Georgia by the staff of Callaway Gardens, and on I . '. Jacobs 8528 (uc) andR. K. Godfrey 55449 (uc). The longitudinal and cross sections of the seed of Torreya are redrawnfrom photographs in Coulter & Iland. while the arillate seed of Taxus jloridana was redrawn froman original illustration supplied by Robert Godfrey. Contribution 616 from the New York State Science Service. 2University Herbarium, University of California. Berkeley, California 94720. Please address reprintrequests to the Biological Survey, New York State Museum. The State Education Department. Albany.New York 12230.c President and Fellows of Harvard College. 1990.Journal of the Arnold Arboretum 71: 69-91. January, 1990.
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