BOT 360F - Families of Vascular Plants


This order comprises the families Saururaceae (below), Piperaceae, Aristolochiaceae, and Hydnoraceae. These families may resemble the monocots in having trimerous flowers (i.e. with parts in multiples of three) and a herbaceous habit and so were thought to be ancestral to the monocots (see the morphology-based tree). Sequence data suggest otherwise.  

Saururus cernuus - habit

Photo © 2001 E. Pontieri

Saururus cernuus - inflorescence

Photo © 2001 E. Pontieri


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Aristolochiaceae - Asarum canadense. The rhizome of this Ontario species can be used as a ginger substitute.

Photo M. Ferguson © 2001 Royal Ontario Museum

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| What are plant families? | How do we distinguish them? | How and why do we study them? | Selected vascular plant families of Ontario | Reading List | Course outline |

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