Heteranthera limosa

(Swartz) Willdenow

Ges. Naturf. Freunde Berlin Neue Schriften 3: 439. 1801.

Basionym: Pontederia limosa Swartz Prodr., 57. 1788
Synonyms: Leptanthus ovalis Michaux
Treatment appears in FNA Volume 26. Treatment on page 44. Mentioned on page 41, 45.

Plants annual. Vegetative stems submersed with elongate internodes only on plants in over 5 cm of water, or emersed and short. Flowering-stems 2–24 cm, distal internode 1–11 cm. Sessile leaves forming basal rosette, blade linear to oblanceolate, thin or sometimes thickened, 3.1–6 cm × 3–5 mm. Petiolate leaves emersed; stipule 1–6 cm; petiole 2–13 cm; blade oblong to ovate, 1–5 cm × 4–33 mm, length equaling or greater than width; base truncate to cuneate, apex acute. Inflorescences 1-flowered; spathes 0.9–4.5 cm, glabrous. Flowers opening within 1 hour after dawn, wilting by midday; perianth blue or white, salverform, tube 15–44 mm, limbs essentially actinomorphic, lobes equal, narrowly elliptic, 5.2–26.3 mm, distal lobes yellow toward base; stamens unequal, lateral stamens 2.3–7.8 mm, central stamen 3.3–7.2 mm; filaments linear, glandular-pubescent; style glabrous. Seeds 9–14-winged, 0.5–0.8 × 0.2–0.6 mm. 2n = 14.


Phenology: Flowering May–Nov.
Habitat: Shallow water or emersed at pond edges and in roadside ditches
Elevation: 0–2000 m

Distribution

V26 13-distribution-map.jpg

Ariz., Ark., Calif., Colo., Fla., Ill., Iowa, Kans., Ky., La., Miss., Mo., Nebr., N.Mex., Okla., S.Dak., Tenn., Tex., Mexico, West Indies, Central America, South America (Argentina), South America (Bolivia), South America (Brazil), South America (Colombia), South America (Ecuador), South America (Paraguay), South America (Venezuela)

Discussion

Personal observation of Heteranthera limosa suggests that it is best adapted for growth in water less than 5 cm deep and is a poor competitor with the closely related H. rotundifolia in deeper waters.

Selected References

None.

Lower Taxa

None.

"elongating" is not a number."/2" is not declared as a valid unit of measurement for this property.

... more about "Heteranthera limosa"
purple +  and yellow +
sagittate;oblong;sagittate;oblong;rounded +
Charles N. Horn +
(Swartz) Willdenow +
truncate;cuneate +
Pontederia limosa +
0.4 cm4 mm <br />0.004 m <br /> (3.3 cm33 mm <br />0.033 m <br />) +
oblong;ovate +
greater than width +
membranous +
0.3 cm3 mm <br />0.003 m <br /> (?) +  and 0.5 cm5 mm <br />0.005 m <br /> (?) +
0.33 cm3.3 mm <br />0.0033 m <br /> (0.72 cm7.2 mm <br />0.0072 m <br />) +
1;several +
1 cm10 mm <br />0.01 m <br /> (11 cm110 mm <br />0.11 m <br />) +
Ariz. +, Ark. +, Calif. +, Colo. +, Fla. +, Ill. +, Iowa +, Kans. +, Ky. +, La. +, Miss. +, Mo. +, Nebr. +, N.Mex. +, Okla. +, S.Dak. +, Tenn. +, Tex. +, Mexico +, West Indies +, Central America +, South America (Argentina) +, South America (Bolivia) +, South America (Brazil) +, South America (Colombia) +, South America (Ecuador) +, South America (Paraguay) +  and South America (Venezuela) +
0–2000 m +
acute;caudate +
purple +  and yellow +
glandular-pubescent +
3-merous +  and sessile +
emersed +  and submersed +
2 cm20 mm <br />0.02 m <br /> (24 cm240 mm <br />0.24 m <br />) +
elongate +
Shallow water or emersed at pond edges and in roadside ditches +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.78 cm7.8 mm <br />0.0078 m <br />) +
petiolate +  and sessile +
Single (?) +  and Many (?) +
actinomorphic +
2 cm20 mm <br />0.02 m <br /> (?) +
6-lobed +
white +  and blue +
salverform +
2 cm20 mm <br />0.02 m <br /> (13 cm130 mm <br />0.13 m <br />) +
Flowering May–Nov. +
3 +  and 1 +
Ges. Naturf. Freunde Berlin Neue Schriften +
9-14-winged +
with longitudinal wings +  and smooth +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
10 +  and 200 +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
clasping +  and folded +
bractlike +
0.9 cm9 mm <br />0.009 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
W2 +  and W1 +
2 +  and 3 +
unequal +
indeterminate +
emersed +  and submersed +
elongate +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
3-lobed +
Leptanthus ovalis +
Heteranthera limosa +
Heteranthera +
species +
funnel +  and tubular +
1.5 cm15 mm <br />0.015 m <br /> (4.4 cm44 mm <br />0.044 m <br />) +