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Science 8 December 1978:
Vol. 202. no. 4372, pp. 1081 - 1083
DOI: 10.1126/science.202.4372.1081
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Articles

Sieve Areas in Fossil Phloem

EDITH L. SMOOT 1 and THOMAS N. TAYLOR 1

1 Department of Botany, Ohio State University, Columbus 43210

Phloem tissue of the Pennsylvanian fern Etapteris is described from permineralized specimens. Sieve elements possess regularly aligned sieve areas containing pores on the radial walls. The presence of these structures provides a basis for comparison with the phloem of living ferns.

Submitted on June 12, 1978
Revised on August 16, 1978


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Sieve Cells in Phloem of a Middle Devonian Progymnosperm.
D. C. Wight, D. C. WIGHT, and C. B. BECK (1984)
Science 225, 1469-1471
   Abstract »    PDF »
The Fine Structure of Fossil Plant Cell Walls.
E. L. Smoot, E. L. SMOOT, and T. N. TAYLOR (1984)
Science 225, 621-623
   Abstract »    PDF »


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