Plant Systematics and Evolution

, Volume 209, Issue 3, pp 239–264

Ovule and seed anatomy ofCistaceae and relatedMalvanae

  • O. I. Nandi
Article

DOI: 10.1007/BF00985231

Cite this article as:
Nandi, O.I. Pl Syst Evol (1998) 209: 239. doi:10.1007/BF00985231

Abstract

Ovule and especially seed anatomy of eight species ofCochlospermaceae, Bixaceae, Cistaceae, Monotoideae, Pakaraimaeoideae (two subfamilies ofDipterocarpaceae), andSarcolaenaceae were investigated. All representatives show a bixoid chalazal region in the seed as probable exclusive synapomorphy among angiosperms. The palisade layer of the exotegmen is curved inwards at its proximal end and forms a dome-shaped structure. A plug of hypostase tissue with an annulus/core structure fits into this dome. Moreover, two additional tissue types in the hypostase can be found in some representatives of the group. These and other micromorphological, wood anatomical, and floral morphological characters, indicate that the taxa form a monophyletic group close toMalvales s. str. The form of the starch grains in the endosperm is compared and is described for the first time forPakaraimaea (Dipterocarpaceae) andLeptolaena (Sarcolaenaceae). The position ofDiegodendron close toBixa and the presumably more distant positions ofMuntingia andNeuradaceae are discussed.

Key words

Cochlospermaceae Bixaceae Cistaceae Dipterocarpaceae Pakaraimaea Sarcolaenaceae Diegodendron Seed anatomy palisade layer starch grains 

Copyright information

© Springer-Verlag 1998

Authors and Affiliations

  • O. I. Nandi
    • 1
  1. 1.Institut für Systematische Botanik der UniversitätZürichSwitzerland

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