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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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Annual, perennial herb from caudices, corms, stolons, rhizomes, or tubers, aquatic (± emergent or on mud); roots fibrous, septate or not; monoecious, dioecious, or flowers bisexual. Stem: caudex short. Leaf: basal, simple, palmately veined, floating or not; submersed generally linear to ovate; emergent linear to sagittate. Inflorescence: generally scapose, umbel-, raceme-, or panicle-like; flowers, branches whorled. Flower: radial; sepals 3, generally green, generally persistent; petals 3, generally > sepals, white or pink; stamens 6–many; pistils 6–many, free or ± fused at base. Fruit: achene, generally compressed, beaked.
± 12 genera, 75–100 species: especially tropics, subtropics. [Haynes & Hellquist 2000 FNANM 22:7–25] —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Rogers 1983 J Arnold Arbor 64:383–420]
Key to Alismataceae
Annual, perennial herb; roots septate; generally monoecious; scape generally straight at inflorescence. Leaf: petiole cylindric to 3-angled; submersed blades tapered to base; floating or emergent blades generally sagittate (linear to ovate). Inflorescence: lowest node generally with 3 pistillate flowers, those above generally staminate. Flower: sepals 3–10 mm, reflexed to appressed in fruit; petals generally entire. Staminate flower: stamens 7–30. Pistillate flower: receptacle convex; pistils many, spiralled on convex receptacle. Fruit: body generally 2–3.5 mm, strongly compressed, abaxially winged or ridged; beak generally lateral, spreading to erect.Key to Sagittaria
± 30 species: worldwide, especially America. (Latin: arrow, from leaf shape) Some species weedy; tubers of some eaten by humans, wildlife; Sagittaria brevirostra Mack. & Bush reportedly persisting at Stafford Lake and Chileno Laguna, Marin Co.
Unabridged references: [Bogin 1955 Mem New York Bot Gard 9:179–233]
Annual. Leaf: petioles of emergent leaves erect to ascending, blades 5–15 cm, sagittate, basal lobes ± = terminal. Inflorescence: lowest node with 2 bisexual flowers. Bisexual flower: pedicel recurved in fruit, thickened; sepals appressed in fruit; petals white, generally with green-yellow spot at base. Staminate flower: filaments papillate. Fruit: side oil-streaked when fresh; beak spreading, 0.4–0.8 mm.
Ponds, rice fields; < 300 m. Great Central Valley, San Francisco Bay Area (Sonoma Co.), c South Coast (Los Angeles Co.); to eastern United States, northern Mexico. Jul–Aug [Online Interchange]
Previous taxon: Sagittaria longiloba
Next taxon: Sagittaria rigida
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Apr 20 2014
Citation for this treatment: [Author of taxon treatment] 2012. Sagittaria, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=52726, accessed on Apr 20 2014
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