Hieracium umbellatum

Linnaeus

Sp. Pl. 2: 804. 1753.

Illustrated
Synonyms: Hieracium acranthophorum Omang Hieracium canadense Michaux Hieracium canadense var. divaricatum Lepage Hieracium canadense var. fasciculatum (Pursh) Fernald Hieracium canadense var. hirtirameum Fernald Hieracium canadense var. subintegrum Lepage Hieracium columbianum Linnaeus Hieracium devoldii Omang Hieracium ×dutillyanum Omang Hieracium eugenii (Laestadius ex Almquist) Almquist ex Omang Hieracium kalmii Schweinitz Hieracium kalmii var. canadense (Michaux) Reveal Hieracium kalmii var. fasciculatum (Pursh) Lepage Hieracium musartutense Hieracium nepiocratum Hieracium rigorosum Hieracium scabriusculum Hieracium scabriusculum var. columbianum (Rydberg) Lepage Hieracium scabriusculum var. perhirsutum Lepage Hieracium scabriusculum var. saximontanum Lepage Hieracium scabriusculum var. scabrum (Schweinitz) Lepage Hieracium stiptocaule Hieracium umbellatum subsp. canadense (Michaux) Guppy Hieracium umbellatum var. scabriusculum (Schweinitz) Farwell
Treatment appears in FNA Volume 19. Treatment on page 287. Mentioned on page 281.

Plants 15–60+ cm. Stems proximally usually glabrous, sometimes piloso-hirsute and/or stellate-pubescent, distally usually glabrous, sometimes stellate-pubescent. Leaves: basal 0(–2), cauline (5–)8–15(–45+); blades lance-elliptic to lanceolate, (20–)50–100(–150) × (10–)15–25(–40+) mm, lengths (3–)5–10+ times widths, bases cuneate to rounded or truncate (then sometimes ± clasping), margins usually toothed (to laciniate), denticulate, or entire (often ± revolute, at least distally), apices obtuse to acute, faces glabrous or ± stellate-pubescent, sometimes ± scabrellous (especially at or near distal margins). Heads (1–)5–30(–100+) in corymbiform to subumbelliform arrays. Peduncles usually stellate-pubescent. Calyculi: bractlets 9–15+. Involucres campanulate to hemispheric, (8–)9–11+ mm. Phyllaries 12–21+, apices rounded to acute, abaxial faces usually glabrous, rarely piloso-hirsute and/or stipitate-glandular. Florets 30–80+; corollas yellow, 10–18 mm. Cypselae columnar, 2.5–3.5 mm; pappi of 50–60+, stramineous to sordid bristles in ± 2 series, 6–7 mm.


Phenology: Flowering (Jun–)Jul–Sep.
Habitat: Disturbed sites (fields, roadsides), rocky slopes, openings in forests, prairies, thickets
Elevation: 600–3200 m

Distribution

V19-403-distribution-map.gif

Greenland, St. Pierre and Miquelon, Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Ont., P.E.I., Que., Sask., Yukon, Alaska, Colo., Conn., Idaho, Ill., Ind., Iowa, Maine, Mass., Mich., Minn., Mo., Mont., Nebr., N.H., N.J., N.Y., N.Dak., Ohio, Oreg., Pa., R.I., S.Dak., Vt., Wash., W.Va., Wis., Wyo., Europe, Asia.

Discussion

The circumscription of Hieracium umbellatum adopted here is supported by research done by others, especially G. A. Guppy (1978) and E. Lepage (1960). Hieracium canadense var. kalmii (Linnaeus) Scoggan, referable here, is an illegitimate name.

Lower Taxa

None.
... more about "Hieracium umbellatum"
John L. Strother +
Linnaeus +
Greenland +, St. Pierre and Miquelon +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.W.T. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Alaska +, Colo. +, Conn. +, Idaho +, Ill. +, Ind. +, Iowa +, Maine +, Mass. +, Mich. +, Minn. +, Mo. +, Mont. +, Nebr. +, N.H. +, N.J. +, N.Y. +, N.Dak. +, Ohio +, Oreg. +, Pa. +, R.I. +, S.Dak. +, Vt. +, Wash. +, W.Va. +, Wis. +, Wyo. +, Europe +  and Asia. +
600–3200 m +
Disturbed sites (fields, roadsides), rocky slopes, openings in forests, prairies, thickets +
Flowering (Jun–)Jul–Sep. +
lepage1960a +
Illustrated +
Hieracium acranthophorum +, Hieracium canadense +, Hieracium canadense var. divaricatum +, Hieracium canadense var. fasciculatum +, Hieracium canadense var. hirtirameum +, Hieracium canadense var. subintegrum +, Hieracium columbianum +, Hieracium devoldii +, Hieracium ×dutillyanum +, Hieracium eugenii +, Hieracium kalmii +, Hieracium kalmii var. canadense +, Hieracium kalmii var. fasciculatum +, Hieracium musartutense +, Hieracium nepiocratum +, Hieracium rigorosum +, Hieracium scabriusculum +, Hieracium scabriusculum var. columbianum +, Hieracium scabriusculum var. perhirsutum +, Hieracium scabriusculum var. saximontanum +, Hieracium scabriusculum var. scabrum +, Hieracium stiptocaule +, Hieracium umbellatum subsp. canadense +  and Hieracium umbellatum var. scabriusculum +
Hieracium umbellatum +
Hieracium +
species +