Elatine rubella

Rydberg

Mem. New York Bot. Gard. 1: 260. 1900.

Common names: Southwestern waterwort
IllustratedEndemic
Treatment appears in FNA Volume 12. Treatment on page 352. Mentioned on page 350.

Herbs, emergent on wet substrates, 1–6 (–16) cm. Stems ascending or prostrate, branched. Leaves reddish green; stipules lanceolate, 0.5–0.6 mm, margins dentate, apex acute; petiole 0.5–1 (–3) mm; blade oblong-lanceolate, 3–8 × (0.5–) 1–2 (–2.2) mm, base attenuate to rounded, apex obtuse to slightly emarginate. Pedicels 0–0.5 mm, erect. Flowers: sepals (2–) 3, if 2, equal, if 3, 1 smaller, oblong-ovate or widely lanceolate, 1–1.5 × 1–1.5 mm; petals 3, pinkish white to reddish, elliptic or ovate, 1–1.5 × 0.5 mm; stamens 3; styles 3. Capsules oblong-ovoid, 3-locular, 1.5–2.5 mm diam. Seeds 10–20 (–30) per locule, narrowly oblong, straight or curved to 15°, 0.5–0.7 × 0.1–0.3 mm; pits angular-hexagonal, length 1–2 times width, in 8–10 rows, 16–25 (–30) per row.


Phenology: Flowering summer.
Habitat: Muddy shores, shallow vernal pools, ditches, rice fields.
Elevation: 0–2900 m.

Distribution

V12 507-distribution-map.jpg

Ariz., Calif., Colo., Idaho, Kans., Mont., Nebr., Nev., N.Mex., Oreg., S.Dak., Utah, Wyo.

Discussion

Reports of Elatine rubella from southern British Columbia and Washington are based on misidentifications of E. brachysperma and E. chilensis, respectively.

Selected References

None.

Lower Taxa

None.
... more about "Elatine rubella"
obtuse +  and slightly emarginate +
Hamid Razifard +, Gordon C. Tucker +  and Donald H. Les +
Rydberg +
attenuate +  and rounded +
0.2 cm2 mm <br />0.002 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
oblong-lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (?) +  and 0.25 cm2.5 mm <br />0.0025 m <br /> (?) +
oblong-ovoid +
membranous +
Southwestern waterwort +
2[-3]-flowered +
Ariz. +, Calif. +, Colo. +, Idaho +, Kans. +, Mont. +, Nebr. +, Nev. +, N.Mex. +, Oreg. +, S.Dak. +, Utah +  and Wyo. +
0–2900 m. +
2[-3]-flowered +
Muddy shores, shallow vernal pools, ditches, rice fields. +
reddish green +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
pinkish white;reddish +
distinct +
1mm;1.5mm +
ovate +  and elliptic +
0.5 cm5 mm <br />0.005 m <br /> (?) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Flowering summer. +
2-4-carpellate +
angular-hexagonal +
Mem. New York Bot. Gard. +
16 +  and 25 +
brown;yellowish-brown +
curved +  and straight +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-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 /> (?) +
? (?) +  and 0.15 cm1.5 mm <br />0.0015 m <br /> (?) +
lanceolate +  and oblong-ovate +
smaller +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Illustrated +  and Endemic +
free +  and distinct +
prostrate +  and decumbent +
prostrate +  and ascending +
lanceolate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
membranous +
distinct +
Crypta +
Elatine rubella +
species +
6 cm60 mm <br />0.06 m <br /> (16 cm160 mm <br />0.16 m <br />) +