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Elatine brachysperma

Higher Taxonomy
Family: ElatinaceaeView DescriptionDichotomous Key

Common Name: WATERWORT FAMILY
Habit: 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.
Genera In Family: 2 genera, 50 species: +- worldwide.
eFlora Treatment Author: Gordon C. Tucker & Evanielis U. Grissom
Scientific Editor: Thomas J. Rosatti.
Genus: ElatineView DescriptionDichotomous Key

Common Name: WATERWORT
Stem: Erect underwater, +- prostrate on wet ground, branched or not; base not woody. Leaf: petiole < 1/3 blade, flat, +- blade-like; blades narrow-elliptic to +- round, +- entire, bases wedge-shaped to +- round, tips round. Inflorescence: flowers 1(2) per node. Flower: sepals, petals wide-elliptic, membranous; sepals pale green; petals pale green-white; stamens (1) 3, 6, 8, filaments 1/2 × to +- equal petals, anthers wide-ovoid; styles 3--4. Fruit: +- spheric or depressed-ovoid; chambers 3--4, each 3--15-seeded; pedicel generally +- 0. Seed: +- visible through fruit wall, elliptic, straight or curved, brown to yellow-brown; surface net-like due to ridges between +- linear rows of pits.
Species In Genus: +- 25 species: worldwide. Etymology: (Greek: fir tree, from a European species that suggests such a plant in miniature) Note: At least 20× magnification needed for pits on seeds.

Elatine brachysperma A. Gray
NATIVE
Stem: decumbent to erect, 1--5(12) cm. Leaf: narrow-oblong to ovate; petiole 1/4--1/3 blade or indistinct. Inflorescence: flowers 1 per node. Flower: sepals 2, +- equal, or 3, 1 < others; petals 3, equal, +- wider than sepals; stamens 3, alternate petals. Fruit: chambers 3. Seed: wide-oblong, curved +- 15°; pits 10--15 per row, wider than long.
Ecology: Muddy shores, shallow pools; Elevation: 50--500 m. Bioregional Distribution: CA; Distribution Outside California: central and southern United States, Mexico. Flowering Time: Apr--Sep
Synonyms: Elatine obovata (Fassett) H. Mason
eFlora Treatment Author: Gordon C. Tucker & Evanielis U. Grissom
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Previous taxon: Elatine ambigua
Next taxon: Elatine californica

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botanical illustration including Elatine brachysperma

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Citation for this treatment: Gordon C. Tucker & Evanielis U. Grissom 2016. Elatine brachysperma, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=23917, accessed on May 06, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 06, 2016.


Geographic subdivisions for Elatine brachysperma:
CA;
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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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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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.