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The Asteridae: Evolution of a Concept and its Present Status

1992; Missouri Botanical Garden; Volume: 79; Issue: 2 Linguagem: Inglês

10.2307/2399766

2162-4372

Gerhard Wagenitz,

Mediterranean and Iberian flora and fauna

The concept of Asteridae can be traced back to the Monopetalae of Tournefort (1694) and de Jussieu (1789). This group, later better known as the Sympetalae, was essentially based on a single character, the united petals. A closer look at the floral morphology and the study of embryology (especially of the ovules) by Van Tieghem and Warming led to the exclusion of some families (e.g., the Cucurbitaceae). Moreover, it became clear that only the «Tetracyclicae» (with one series of stamina alternating with the petals) may probably form a coherent group. Formal recognition of this group as a subclass was proposed by Takhtajan in 1964 and has been accepted by Cronquist (1968) (...)