familyAsteraceae
genusHelianthus
speciesHelianthus petiolaris
subspeciesHelianthus petiolaris subsp. petiolaris
Helianthus petiolaris subsp. petiolaris
IllustratedEndemic
Synonyms: Helianthus couplandii B. Boivin
Stems usually hispidulous to strigillose, rarely ± hirsute to glabrate. Leaves: abaxial faces sparsely, if at all, glanddotted. Peduncles usually bractless. Phyllaries 3–5 mm wide. Disc corollas: throats abruptly narrowed distal to densely hairy basal bulbs. 2n = 34.
Phenology: Flowering early summer–fall.
Habitat: Dry open areas, usually sandy soils
Elevation: 10–1500(–2000) m
Distribution
Alta., Man., Ont., Sask., Ariz., Ark., Calif., Colo., Conn., Del., D.C., Idaho, Ill., Ind., Iowa, Kans., La., Maine, Mass., Mich., Minn., Mo., Mont., Nebr., Nev., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Oreg., Pa., S.C., S.Dak., Tenn., Tex., Utah, Va., Wash., W.Va., Wis., Wyo.
Discussion
Subsp. petiolaris is native to western North America and adventive elsewhere (e.g., introduced in Ontario). Hybrids with with H. annuus and H. debilis have been reported.
Selected References
None.
Lower Taxa
None.
... more about "Helianthus petiolaris subsp. petiolaris"
introrse +
connate +
herbaceous +
short-attenuate +
scarious +
absent +
purplish +
hirsute +
papillate +
continuous +
3-nerved +
lanceolate;deltate-ovate or ovate +
winged;ribbed;winged;ribbed +
1;15 +
stigmatic +
absent +
zygomorphic +
monomorphic +
dimorphic +
villous +
3mm;4.5mm +
staminate +
Alta. +, Man. +, Ont. +, Sask. +, Ariz. +, Ark. +, Calif. +, Colo. +, Conn. +, Del. +, D.C. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, La. +, Maine +, Mass. +, Mich. +, Minn. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Oreg. +, Pa. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Utah +, Va. +, Wash. +, W.Va. +, Wis. + and Wyo. +
straight +
distinct +
proximal +
1;5 +
bisexual +
dispersed +
singly +
whitish +
discoid +
indeterminate +
1;5 +
Present +
surrounding +
hemispheric +
alternate +
cauline +
yellow;reddish +
triangular +
lobed +
2-carpellate +
inferior +
attached +
anatropous +
3-toothed +
persistent +
falling +
absent +
coroniform +
bractless +
tough +
thick +
absent +
connate +
persistent +
distinct +
falling +
unequal +
J. Acad. Nat. Sci. Philadelphia +
1821 +
neuter +
absent +
sterile +
paleate +
flat;slightly convex +
fibrous +
shorter +
aristate +
exalbuminous +
modifed +
2;3 +
alternate +
branched +
erect +
continuous +
2-branched +
papillate +
Helianthus petiolaris subsp. petiolaris +
Helianthus petiolaris +
subspecies +
campanulate +
equaling +
shorter +
annual +