Systematics and Palynology of Picrodendron Further Evidence for Relationship with the Oldfieldioideae (Euphorbiaceae)

Authors

W. John Hayden, University of RichmondFollow
W. T. Gillis
D. E. Stone
C. R. Broome
G. L. Webster

Abstract

Although known to botanical science for 285 years, the genus Picrodendron Planchon has been poorly understood for most of this time. The most pervasive problem has been that of discerning familial relationships, and there have been additional difficulties in typifying the generic name (Hayden & Reveal, 1980) and in distinguishing its three nominate species. This paper provides a systematic treatment for Picrodendron and demonstrates its relationships with Euphorbiaceae subfam. Oldfieldioideae Kohler & Webster as evidenced by data on gross morphology, palynology, anatomy, and cytology.

Document Type

Article

Publication Date

1984

Publisher Statement

Copyright © 1984, Arnold Arboretum. This article first appeared in Journal of Arnold Arboretum: 65 (1984), 105-127.

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Recommended Citation

Hayden, W. John, W. T. Gillis, D. E. Stone, C. R. Broome, and G. L. Webster. "Systematics and Palynology of Picrodendron Further Evidence for Relationship with the Oldfieldioideae (Euphorbiaceae)." Journal of the Arnold Arboretum 65 (1984): 105-27.