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ELATINACEAE WATERWORT FAMILY

Gordon C. Tucker & Evanielis U. Grissom

Annual, short-lived perennial herb, in or near water; roots fibrous, from taproot or not, generally from lower leaf axils also. Stem: generally soft. Leaf: simple, opposite, ± 4-ranked; stipules scarious. Inflorescence: flowers in upper axils, 1 or few in clusters. Flower: small, inconspicuous, radial, bisexual; sepals, petals 2–5, equal in number, generally free; ovary spheric, styles 3–5, short. Fruit: capsule, septicidal, ± spheric, ovoid, or depressed-ovoid, walls thin; chambers 2–5, each several to many-seeded. Seed: small; surface net-like or glossy.
2 genera, 50 species: ± worldwide. [Yang & Tucker 2007 Fl China 13:55–56] —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Tucker 1986 J Arnold Arbor 67:471–483]

Key to Elatinaceae

BERGIA WATERFIRE
Stem: prostrate to ascending; branches 0 to many; base ± woody or not. Leaf: blade > petiole, elliptic, serrate, base wedge-shaped, tip acute. Flower: sepals deltate; petals oblong, membranous, glabrous; stamens 5–10, filaments ± = petals, anthers elliptic; styles 5. Fruit: ovoid; chambers 5, each many-seeded. Seed: not visible through fruit wall, oblong, ± curved, brown; surface ± net-like.
± 25 species: generally Old World tropics, 1 North America. (P.J. Bergius, student of Linnaeus, 1730–1790)

B. texana (Hook.) Walp.
NATIVE
Flower: Sepals acute, midvein green, margins scarious; petals glabrous, ± white.
Moist, disturbed soils, sandbars along rivers, margins of pools; < 200 m. Great Central Valley, South Coast; to eastern Washington, central and southern United States, northwestern Mexico. Jul–Aug [Online Interchange]
Unabridged note: Evidently spreading to reservoirs near enough to be considered Sacramento Valley. Expanded author citation: Bergia texana (Hook.) Seub. ex Walp.

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Next taxon: Elatine

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jul 29 2014
Citation for this treatment: [Author of taxon treatment] 2013. Bergia, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=15606, accessed on Jul 29 2014

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Bioregions in which Bergia texana occurs 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.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.