Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
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Elizabeth McClintock

Perennial, often large, terrestrial or semi-aquatic, rhizomed, monoecious or dioecious
Stem ± 0
Leaves simple, generally alternate, from rhizome, often large; stipules 0 or scale-like; blades < to > petioles, ± round to reniform or ovate, generally toothed or lobed
Inflorescence: spike or panicle of spikes, terminal or from upper axils, large; flowers many, often pistillate below, staminate above, bisexual between
Flower very small; sepals generally 2 or ± 0; petals 2 or 0; stamens 1–2; ovary inferior, chamber 1, styles 2
Fruit: drupe
Genera in family: 1 genus, ± 35 species: Mex, s hemisphere; several cultivated. Sometimes included in Haloragaceae.


Etymology: (J.E. Gunner, Norwegian bishop, botanist, 1718–1773)
Reference: [Osborne et al. 1991 Bioscience 41:224–234]
Blue-green algae sometimes in live rhizome, or roots, fix nitrogen for host plant.

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bioregional map for GUNNERA being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

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