Elatine brachysperma

A. Gray

Proc. Amer. Acad. Arts 13: 361, 363. 1878.

Common names: Short-seed waterwort
Synonyms: Alsinastrum brachyspermum (A. Gray) Greene Elatine obovata (Fassett) H. Mason E. triandra var. brachysperma (A. Gray) Fassett E. triandra var. obovata Fassett Potamopitys brachysperma (A. Gray) Kuntze
Treatment appears in FNA Volume 12. Treatment on page 353. Mentioned on page 350, 352.

Herbs, submersed or emersed on wet substrates, 0.5–3 (–5) cm. Stems ascending or prostrate, branched. Leaves reddish green; stipules lanceolate, 0.5–0.6 mm, margins dentate, apex acute; petiole (0–) 1–3 mm; blade narrowly oblong to ovate, 3–8 × 1–3 mm, base cuneate to rounded, apex rounded to obtuse. Pedicels 0–0.4 mm, erect. Flowers: sepals (2–) 3, equal, oblong-ovate, 1.1–1.3 × 0.3 mm; petals 3, pinkish, elliptic or ovate, 1–1.5 × 0.5 mm; stamens 3; styles 3. Capsules globose, 3-locular, 1.1–1.7 mm diam. Seeds (6–) 10–15 per locule, oblong, straight or curved to 30°, 0.3–0.5 × 0.1–0.3 mm; pits ± round, length 1–2 times width, in 6 (–8) rows, (9–) 14–17 per row.


Phenology: Flowering summer–early fall.
Habitat: Muddy shores, often of ponds or reservoirs.
Elevation: 0–1500(–2200) m.

Distribution

V12 828-distribution-map.jpg

B.C., Ala., Ariz., Calif., Ga., Ill., La., Mont., Nebr., Nev., N.Mex., Ohio, Okla., Oreg., Tex., Wash., Wyo., Mexico (Baja California), South America (Argentina)

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Elatine brachysperma"
Rounded (?) +  and Obtuse (?) +
Hamid Razifard +, Gordon C. Tucker +  and Donald H. Les +
A. Gray +
cuneate +  and rounded +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
narrowly oblong;ovate +
1mm;3mm +
0.11 cm1.1 mm <br />0.0011 m <br /> (?) +  and 0.17 cm1.7 mm <br />0.0017 m <br /> (?) +
membranous +
Short-seed waterwort +
2[-3]-flowered +
B.C. +, Ala. +, Ariz. +, Calif. +, Ga. +, Ill. +, La. +, Mont. +, Nebr. +, Nev. +, N.Mex. +, Ohio +, Okla. +, Oreg. +, Tex. +, Wash. +, Wyo. +, Mexico (Baja California) +  and South America (Argentina) +
0–1500(–2200) m. +
2[-3]-flowered +
Muddy shores, often of ponds or reservoirs. +
reddish green +
0 cm0 mm <br />0 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
distinct +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Ovate (?) +  and Elliptic (?) +
0.5 cm5 mm <br />0.005 m <br /> (?) +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Flowering summer–early fall. +
2-4-carpellate +
Proc. Amer. Acad. Arts +
14 (?) +  and 17 (?) +
curved +  and straight +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (?) +  and 0.03 cm0.3 mm <br />3.0e-4 m <br /> (?) +
1.1mm (?) +  and 1.3mm (?) +
oblong-ovate +
smaller +
0.3 cm3 mm <br />0.003 m <br /> (?) +
free +  and distinct +
prostrate +  and decumbent +
prostrate +  and ascending +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
membranous +
distinct +
Alsinastrum brachyspermum +, Elatine obovata +, E. triandra var. brachysperma +, E. triandra var. obovata +  and Potamopitys brachysperma +
Elatine brachysperma +
species +
emersed +  and submersed +