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Asterales (5296 words) |
 | Calyceraceae + Asteraceae: flowers small, C tubular, commissural veins connate, (median veins 0), filament collar +, G [2], with 1 ovule; fruit a cypsela, K persistent, modified, involved in dispersal. |
| Calyceraceae are herbs that may be recognised by their capitate inflorescences the flowers of which often open centripetally. |
| The flowers are small and polysymmetric, the sepals are spines or are thick and aerenchymatous, the outer layer of the tubular corolla is photosynthetic, the stamens are free, and the ovary is inferior. |
| PBIO 450 Lecture Notes - Asteridae -- Spring 1999 (845 words) |
| While the near association of the Menyanthaceae is somewhat supported by the rbcL data, I am not inclined to muddy the water with the addition of a family that otherwise clearly fits in the Campanulanae. |
| The significance of the Calycerales (and therefore the Calyceraceae) is that here is the one group that probably points the way toward the evolutionary establishment of the Asterales (and therefore the Asteraceae). |
| A potential problem with using the Calycerales as a near relative to the Asterales is that the latter are probably primitively woody with opposite leaves whereas the Calycerales are herbs with alternate leaves. |
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