Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
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Robert F. Thorne

Perennial from corm or short, thick rhizome, aquatic, glabrous
Leaves simple, basal, generally submersed, petioled; blade expanded or not (if floating, blade elliptic to lanceolate)
Inflorescence: generally spike, terminal; branches 2–3(10), scapose above water, subtended by conspicuous, deciduous bract
Flower generally bisexual; perianth parts 0–6, generally petal-like; stamens 6 in 2 whorls or many; pistils generally 3–6, fused ± 1/2–2/3 length, simple above, separating in fruit, ovary superior, chamber 1, ovules 1–8, style short, stigmatic surface grooved
Fruit: follicles, leathery
Seeds several; embryo straight
Genera in family: 1 genus, ± 40 species: tropical Asia to Australia, s Africa.


1 genus,
Species in genus: ± 40 species: old world tropical (Asia, Australia), s Africa
Etymology: (Greek: from aquatic habitat)

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bioregional map for APONOGETON 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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