Jepson Herbarium
		University of California, Berkeley

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Perennial from corm, tuber, or short, thick rhizome, aquatic, glabrous; sap milky.
Leaf: alternate, simple, [generally submersed] or floating, petioled, basal in opposite pairs; blade expanded or not, elliptic to lanceolate if floating.
Inflorescence: terminal, scape above water, generally spike or panicle with 2–3(10) spike-like branches, subtended by conspicuous, deciduous bract.
Flower: bisexual [ unisexual], bilateral; perianth parts [0]1[6], generally petal-like, white or yellow; stamens 6–18 in 2 series or 6–50 in 3–4 series; pistils 2–6(9), fused ± 1/2–2/3, separating in fruit, ovary superior, chamber 1, ovules 1–12, style short, stigmatic surface grooved.
Fruit: follicle, leathery.
Seed: 4; embryo straight.
1 genus, ± 54 species: tropical Asia, Australia, s Africa. [Les et al. 2005 Syst Bot 30:503–519] —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Les, D. H., Moody, M. L., & Jacobs, S. W. L. 2005. Phylogeny and systematics of Aponogeton (Aponogetonaceae): The Australian species. Syst. Bot. 30: 503–519; Van Bruggen, H. W. E. 1973. Revision of the genus Aponogeton (Aponogetonaceae): VI the species of Africa. Bull. Jard. Bot. Natl. Belg. 43: 1–2, 193–233]

(Greek: from aquatic habitat)

Leaf: petiole to 100 cm; blade 6–23 cm, ± narrow- lanceolate to - elliptic.
Inflorescence: panicle of generally 2 spike-like branches, emergent; bract ± 3 cm; flowers in 2 rows, ± on 1-side of axis.
Flower: perianth part 1, white, enlarging, turning green in fruit, base wide; stamens many.
Fruit: to 22 mm, curved or straight; beak terminal, ± 5 mm.
Ponds; < 150 m. c-w San Francisco Bay Area, s South Coast, expected elsewhere;

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].

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Bioregions in which taxon occurs	Red area (if present) is the part of the bioregion lying between the upper and lower elevation limits of the taxon; markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
Chart based on elevation range in Manual and elevations and coordinates of CCH records. Data provided by the participants of the Consortium of California Herbaria. Note: About half of the CCH records include both elevation and coordinates.	Map made in collaboration with Scott Loarie. Data provided by the participants of the Consortium of California Herbaria. View all CCH records   CCH collections by month Duplicates counted once; synonyms included. Species do not include records of infraspecific taxa. Blue line denotes Manual flowering time.