Northern Prairie Wildlife Research Center
Aquatic and Wetland Vascular Plants of the Northern Great Plains
Araceae - The Arum Family
Rhizomatous perennials of bogs and swamps. Inflorescence scapose, consisting
of a fleshy cylindric spadix subtended by a leaflike or bractlike spathe.
Flowers small, crowded on the spadix, perfect or mostly so (in those
included here); perianth of 6 tepals or absent; stamens 6, anthers
short and broad, filaments flat and appressed to the ovary; pistil 1-
to 3-carpellary, stigma sessile, ovary superior. Fruit dry or fleshy,
gelatinous within, containing 1-few seeds.
||Leaves linear; spathe green, appearing as a leaflike
extension of the scape, the spadix thus appearing lateral.
||Leaves petioled with broadly heart-shaped blades;
spathe white, clearly differentiated from the scape, the spadix terminal.
59. Araceae, the Arum Family
1. Acorus L. -- Sweet flag, calamus
2. Calla L. -- Water arum
- 1. Acorus calamus L.
- 1. Calla palustris L.
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