Petasites frigidus var. palmatus

(Aiton) Cronquist

Rhodora 48: 124. 1946.

Common names: Western sweet coltsfoot pétasite palmé
IllustratedEndemic
Basionyms: Tussilago palmata Aiton Hort. Kew 3: 188, plate 2. 1789
Synonyms: Nardosmia palmata (Aiton) Hooker Petasites arcticus A. E. Porsild Petasites frigidus subsp. arcticus (A. E. Porsild) Cody Petasites palmatus (Nuttall) Piper Petasites palmatus subsp. speciosus (Nuttall) Toman Petasites speciosus
Treatment appears in FNA Volume 20. Treatment on page 638. Mentioned on page 637, 640.

Basal leaves: blades palmately nerved, orbiculate or cordate to reniform, 2–40 × 4–50 cm, margins palmately lobed (primary lobes 5–11, lanceolate to oblong or cuneate, sinuses more than halfway to bases, sometimes secondary lobes 0–13, entire or dentate, teeth to 52 per side), adaxial and abaxial faces glabrous or woolly, sometimes glabrescent. Staminate heads 4–32; ray (or pistillate) florets 5–70, corolla laminae 0 or 0.1–6.3 mm; disc-floret style-branches 0–1.7 mm. Pistillate heads 8–42; ray (or pistillate) florets 51–125, corolla laminae 0 or 0.1–6.3 mm; disc-florets: corolla lobes 0.5–2.9 mm, style-branches 0–0.8 mm, papillate or hairy. Pappi (pistillate) to 11.8 mm. 2n = 60, 61, 62.


Phenology: Flowering early spring.
Habitat: Moist disturbed areas, stream banks, fens, swamps, roadside ditches and embankments, logging roads, moist forest soils
Elevation: 10–1500 m

Distribution

V20-1437-distribution-map.gif

St. Pierre and Miquelon, Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Nunavut, Ont., P.E.I., Que., Sask., Yukon, Calif., Conn., Idaho, Maine, Mass., Mich., Minn., N.H., N.Y., N.Dak., Oreg., R.I., Vt., Wash., Wis.

Discussion

Selected References

None.

Lower Taxa

None.

62 +, 61 +  and 60 +
densely white-tomentose +  and lanate +
glabrescent +, woolly +  and glabrous +
glabrous +, glabrescent +, floccose +  and lanate +
glabrous +, glabrescent +  and tomentulose +
not tailed +, rounded +  and obtuse +
papillate +
scarious +
usually ovate +  and lance-linear +
racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Randall J. Bayer +, A. Linn Bogle +  and Donna M. Cherniawsky +
(Aiton) Cronquist +
decurrent +
Tussilago palmata +
2 cm20 mm <br />0.02 m <br /> (40 cm400 mm <br />0.4 m <br />) +
cordate;reniform +
4cm;50cm +
winged;nerved;ribbed +
barbellulate +  and smooth +
long-lived +
Western sweet coltsfoot +  and pétasite palmé +
whitish +, pinkish +  and purplish +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.29 cm2.9 mm <br />0.0029 m <br />) +
10-ribbed +  and 5-ribbed +
narrowly cylindric +  and weakly fusiform or more or less prismatic +
0 cm0 mm <br />0 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
fertile +  and bisexual +
St. Pierre and Miquelon +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.W.T. +, N.S. +, Nunavut +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Calif. +, Conn. +, Idaho +, Maine +, Mass. +, Mich. +, Minn. +, N.H. +, N.Y. +, N.Dak. +, Oreg. +, R.I. +, Vt. +, Wash. +  and Wis. +
10–1500 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Moist disturbed areas, stream banks, fens, swamps, roadside ditches and embankments, logging roads, moist forest soils +
pistillate +  and staminate +
disciform +  and discoid +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
fertile +  and bisexual +
0.6 cm6 mm <br />0.006 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
obconic;turbinate +
sessile +  and petiolate +
cauline +  and basal +
toothed +, lobed +, obtuse +  and acute +
serrate +  and entire +
2-carpellate +
0 cm0 mm <br />0 m <br /> (1.18 cm11.8 mm <br />0.0118 m <br />) +
Flowering early spring. +
pistillate +  and staminate +
connate +  and distinct +
0.1 cm1 mm <br />0.001 m <br /> (0.95 cm9.5 mm <br />0.0095 m <br />) +
narrowly oblong +  and linear +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.33 cm3.3 mm <br />0.0033 m <br />) +
neuter +  and styliferous +
sterile +  and fertile +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
Illustrated +  and Endemic +
not branched +
appendaged +  and truncate +
papillate +
Nardosmia palmata +, Petasites arcticus +, Petasites frigidus subsp. arcticus +, Petasites palmatus +, Petasites palmatus subsp. speciosus +  and Petasites speciosus +
Petasites frigidus var. palmatus +
Petasites frigidus +
variety +
25 cm250 mm <br />0.25 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
10 cm100 mm <br />0.1 m <br /> (25 cm250 mm <br />0.25 m <br />) +