Ranunculus aquatilis var. aquatilis

Illustrated
Synonyms: Ranunculus aquatilis var. hispidulus (Drew) W. B. Drew Ranunculus trichophyllus var. hispidulus
Treatment appears in FNA Volume 3.

Leaves of 2 types: laminate and filiform-dissected. Achenes 1.6-2 × 1-1.4 mm; beak 0.1-0.4 mm. 2n = 48 (Europe).


Phenology: Flowering spring–summer (Apr–Sep).
Habitat: Marshes, ditches, streams, ponds, and lakes
Elevation: 0-2500 m

Distribution

V3 216-distribution-map.gif

B.C., N.W.T., Alaska, Calif., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo., South America, Eurasia

Discussion

Plants growing in deep water may flower without producing floating leaves. Such plants cannot be distinguished from specimens of Ranunculus aquatilis var. diffusus except by culture in shallow water.

Selected References

None.

Lower Taxa

None.
not prolonged +
flattened-ellipsoid +  and ellipsoid +
1-2 times as wide as thick +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
hispid +  and glabrous +
1mm;1.4mm +
Alan T. Whittemore +
Linnaeus +
cuneate +, truncate +  and cordate +
Ranunculus sect. Batrachium +
curved +  and straight +
persistent +
filiform +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
large +  and small +
globose;cylindric +
2-50-flowered +
0 cm0 mm <br />0 m <br /> (25 cm250 mm <br />0.25 m <br />) +
B.C. +, N.W.T. +, Alaska +, Calif. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +, Wyo. +, South America +  and Eurasia +
0-2500 m +
showy +  and inconspicuous +
sessile +  and aggregate +
cylindric;obovoid;cylindric;obovoid;globose;lenticular;discoid +
Marshes, ditches, streams, ponds, and lakes +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
hemispheric;ovoid +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
whorled +, opposite +  and alternate +
connate +
filiform-dissected +
palmate +  and pinnate +
distinct +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
conspicuous +
reduced +
0.1 cm1 mm <br />0.001 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering spring–summer (Apr–Sep). +
4 +  and 250 +
glabrous +  and hispid +
not arillate +  and stalked +
entire to shallowly +
white;yellow;white;yellow;purple;sometimes;green +
deciduous +
distinct +
reflexed +  and spreading +
oblong +  and elliptic ovate or lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Illustrated +
not bulbous-based +
floating +  and creeping +
persistent +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Ranunculus aquatilis var. hispidulus +  and Ranunculus trichophyllus var. hispidulus +
Ranunculus aquatilis var. aquatilis +
Ranunculus aquatilis +
variety +
perennial +  and annual +
herbaceous +  and woody +