Wheeler, Elisabeth A. , Baas, P. , Lee, Sung-Jae .
Is it Altingiaceae, Hamamelidaceae, Daphniphyllaceae, or Cercidiphyllaceae?
The families Altingiaceae, Hamamelidaceae, Daphniphyllaceae, and Cercidiphyllaceae, all Saxifragales, share many wood anatomical features: predominantly solitary vessels that are narrow and numerous, scalariform perforation plates, opposite – scalariform intervessel pitting, non-septate fibers with distinctly bordered pits, and narrow heterocellular rays. Because of these similarities it can be difficult to assign a fossil wood sample with those shared features to but one of these families. A confounding factor is that there are families outside the Saxifragales with this combination of features as well (Adoxaceae, Caprifoliaceae, Cornaceae, Cunoniaceae, Dilleniaceae, Ericaceae, Illiciaceae, Pentaphylacaceae, Theaceae). Wood anatomical characteristics of extant members of the 4 Saxifragalean families are compared, including unpublished data on the Hamamelidaceae. It is possible to distinguish some genera using ray and crystal characteristics. There are fossil woods from the late Cretaceous of California (V.M. Page collections), early middle Eocene of Yellowstone National Park, Wyoming (R.A. Scott collections, Yamamoto and Chadwick collections), and late Eocene of Post, Oregon (S.R. Manchester), that resemble these families. At least one of the Yellowstone woods and at least one of the Post, Oregon, woods can be assigned to the Hamamelidaceae (Hamamelidoideae) on the basis of ray characteristics.
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1 - N.C. State University, Wood and Paper Science, Box 8005, Raleigh, N.C., 27695-8005, USA
2 - Nationaal Herbarium Nederland, Universiteit Leiden Branch, Po Box 9514, Leiden, NL-2300 RA, Netherlands
3 - Kangwon Forest Research Institute, 132-2 Woodu-Dong, Chunchon, Kanwon-Do, Republic of Korea (South
Presentation Type: Oral Paper:Papers for BSA Sections
Location: Superior A/Cliff Lodge - Level C
Date: Wednesday, July 29th, 2009
Time: 1:15 PM