Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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ALISMATACEAE

WATER-PLANTAIN FAMILY

Charles E. Turner

Annual, perennial herb from corms, stolons, rhizomes, or tubers, aquatic (± emergent or on mud), generally bisexual; roots fibrous
Stem: caudex short
Leaves: basal, simple, palmately veined, sometimes floating; submersed blades generally linear to ovate; emergent blades linear to sagittate
Inflorescence generally scapose, umbel- to panicle-like; flowers whorled, in interrupted clusters
Flowers bisexual or unisexual, radial; sepals 3, generally green, generally persistent; petals 3, generally > sepals, white or pink; stamens 6–many; pistils 6–many, generally simple
Fruit: achene, generally compressed, beaked
Genera in family: ± 12 genera, 75–100 species: especially n hemisphere
Reference: [Rogers 1983 J Arnold Arbor 64: 383–420]

SAGITTARIA

ARROWHEAD, TULE POTATO, WAPATO

Annual, perennial herb, generally monoecious; roots partitioned
Leaves: petiole unangled; submerged blades tapered to base; floating or emergent blades generally sagittate (or linear to ovate)
Inflorescence: lowest node generally with 3 pistillate flowers; staminate flowers above
Flowers generally unisexual; sepals 3–10 mm, reflexed to appressed in fruit; petals generally entire
Pistillate flower: receptacle convex; pistils many, in spheric cluster
Staminate flower: stamens many
Fruit: body generally 2–3.5 mm, strongly compressed, back winged or ridged; beak generally lateral, spreading or erect
Species in genus: ± 20 species: worldwide, especially Am
Etymology: (Latin: arrow, from leaf shape)
Reference: [Bogin 1955 Mem NY Bot Gard 9:179–233]
Some species weedy; tubers of some used for human and wildlife food.

Native

S. montevidensis Cham. & Schldl. subsp. calycina (Engelm.) Bogin

Annual; flowers bisexual and staminate on same plant
Leaves: emergent blades 5–15 cm, sagittate, lower lobes ± = terminal lobe
Inflorescence: lowest node with 2 bisexual flowers
Bisexual flower: pedicel recurved, thickened in fruit; sepals appressed in fruit; petals white, with green-yellow spot at base
Staminate flower: filaments papillate
Fruit: side oil-streaked when fresh; beak 0.5–1.5 mm, spreading
Ecology: Ponds, ditches, rice fields
Elevation: < 300 m.
Bioregional distribution: Great Central Valley, San Francisco Bay Area (Sonoma Co.), c South Coast (Los Angeles Co.)
Distribution outside California: to e US, n Mexico
Ssp. m. in South America
Horticultural information: TRY.

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bioregional map for SAGITTARIA%20montevidensis%20subsp.%20calycina 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).

Retrieve Jepson Interchange Index to Plant Names entry for Sagittaria montevidensis subsp. calycina
Retrieve dichotomous key for Sagittaria
Overlay Consortium of California Herbaria specimen data by county on this map
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