Ranunculus macounii

Britton

Trans. New York Acad. Sci. 12: 3. 1892.

Common names: Renoncule de Macoun
Endemic
Synonyms: Ranunculus macounii var. oreganus (A. Gray) K. C. Davis
Treatment appears in FNA Volume 3.

Stems prostrate to nearly erect, often rooting nodally, hirsute or glabrous, base not bulbous. Roots never tuberous. Basal leaf-blades cordate to reniform in outline, 3-foliolate, 3.7-7.5 × 4.5-9.5 cm, leaflets 3-lobed or parted, ultimate segments elliptic or lance-elliptic, margins toothed or lobulate, apex acute to broadly acute. Flowers: receptacle hirsute; sepals spreading or reflexed ca. 1 mm above base, 4-6 × 1.5-3 mm, glabrous or hirsute; petals 5, yellow, 4-6 × 3.5-5 mm. Heads of achenes globose or ovoid, 7-11 × 7-10 mm; achenes 2.4-3 × 2-2.4 mm, glabrous, margin forming narrow rib 0.1-0.2 mm wide; beak persistent, lanceolate to broadly lanceolate, straight or nearly so, 1-1.2 mm. 2n = 32, 48.


Phenology: Flowering spring–summer (May–Sep).
Habitat: Meadows, depressions in woodlands, ditches, edges of streams and ponds, on wet soil or emergent from shallow water
Elevation: 0-2900 m

Distribution

V3 165-distribution-map.gif

Alta., B.C., Man., Nfld. and Labr. (Nfld.), N.W.T., Ont., Que., Sask., Yukon, Alaska, Ariz., Calif., Colo., Idaho, Mich., Minn., Mont., Nebr., Nev., N.Mex., N.Dak., Oreg., S.Dak., Utah, Wash., Wyo.

Discussion

Through most of its range, Ranunculus macounii has conspicuously hispid herbage. Glabrous plants are found, however, in the lower Columbia River valley (southwestern Washington and adjacent Oregon). This variant has been called R. macounii var. oreganus.

Selected References

None.

Lower Taxa

None.

"high" is not a number.

... more about "Ranunculus macounii"
not prolonged +
3-15 times as wide as thick +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
2mm;2.4mm +
acute +  and broadly acute +
Alan T. Whittemore +
Britton +
3.7 cm37 mm <br />0.037 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
4.5 cm45 mm <br />0.045 m <br /> (9.5 cm95 mm <br />0.095 m <br />) +
not bulbous +
cuneate +, truncate +  and cordate +
nearly +  and straight +
persistent +
lanceolate +  and broadly lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
large +  and small +
globose;cylindric +
Renoncule de Macoun +
1-50-flowered +
0 cm0 mm <br />0 m <br /> (25 cm250 mm <br />0.25 m <br />) +
Alta. +, B.C. +, Man. +, Nfld. and Labr. (Nfld.) +, N.W.T. +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Ariz. +, Calif. +, Colo. +, Idaho +, Mich. +, Minn. +, Mont. +, Nebr. +, Nev. +, N.Mex. +, N.Dak. +, Oreg. +, S.Dak. +, Utah +, Wash. +  and Wyo. +
0-2900 m +
showy +  and inconspicuous +
sessile +  and aggregate +
cylindric;obovoid;cylindric;obovoid;globose;lenticular;discoid +
Meadows, depressions in woodlands, ditches, edges of streams and ponds, on wet soil or emergent from shallow water +
0.7 cm7 mm <br />0.007 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
ovoid;globose +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
axillary +  and terminal +
reniform +  and linear +
whorled +, opposite +  and alternate +
cauline +  and basal +
parted +  and lobed +
parted +  and 3-lobed +
palmate +  and pinnate +
lobulate;toothed +
0.1mm;0.2mm +
distinct +
conspicuous +
linear +  and orbiculate +
reduced +
0.1 cm1 mm <br />0.001 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering spring–summer (May–Sep). +
4 +  and 250 +
Trans. New York Acad. Sci. +
nodal +  and basal +
not arillate +  and stalked +
parted +  and lobed +
white;yellow;white;yellow;purple;sometimes;green +
deciduous +
distinct +
reflexed +  and spreading +
hirsute +  and glabrous +
oblong +  and elliptic ovate or lanceolate +
1 cm10 mm <br />0.01 m <br /> (?) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
(5-)10-many +
prostrate +  and nearly erect +
glabrous +  and hirsute +
persistent +
Ranunculus macounii var. oreganus +
Ranunculus macounii +
Ranunculus sect. Ranunculus +
species +
lance-elliptic +  and elliptic +
perennial +  and annual +
glabrous +  and hispid +
herbaceous +  and woody +