Sonchus arvensis subsp. arvensis
WeedyIntroduced
Treatment appears in FNA Volume 19. Treatment on page 274.
Peduncles stipitate-glandular. Phyllaries stipitate-glandular, longer 14–17 mm. 2n = 54.
Phenology: Flowering Jul–Sep.
Habitat: Disturbed sites, mostly wet, particularly in urban areas, roadside ditches, along streams
Elevation: 0–1600 m
Distribution
Introduced; St. Pierre and Miquelon, Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.W.T., N.S., Ont., P.E.I., Que., Sask., Alaska, Calif., Colo., Conn., Del., Idaho, Ill., Ind., Iowa, Ky., Maine, Md., Mass., Mich., Minn., Mo., Mont., Nev., N.H., N.J., N.Y., N.Dak., Ohio, Oreg., Pa., R.I., S.Dak., Utah, Vt., Wash., Wis., Wyo., Europe, widely elsewhere
Discussion
Subspecies arvensis is considered a noxious weed in California, Idaho, Illinois, Iowa, Maryland, Minnesota, Nevada, North Dakota, South Dakota, and Wyoming.
Selected References
None.
Lower Taxa
None.
"fine" is not a number.
... more about "Sonchus arvensis subsp. arvensis"
tailed +
introrse +
connate +
acute +
scarious +
developed +
absent +
hirsute +
papillate +
lobed;rounded;auriculate;oblong;lanceolate +
persistent +
falling +
continuous +
petiolate +
2cm;15cm +
absent +
deltate +
not constricted +
winged +
ribbed +
1;15 +
filiform +
stigmatic +
white +
80;100 +
coarse +
absent +
sessile +
monomorphic +
dark-brown +
2.5mm;3.5mm +
St. Pierre and Miquelon +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.W.T. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Alaska +, Calif. +, Colo. +, Conn. +, Del. +, Idaho +, Ill. +, Ind. +, Iowa +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, Mont. +, Nev. +, N.H. +, N.J. +, N.Y. +, N.Dak. +, Ohio +, Oreg. +, Pa. +, R.I. +, S.Dak. +, Utah +, Vt. +, Wash. +, Wis. +, Wyo. +, Europe + and widely elsewhere +
straight +
glabrous +
distinct +
ligulate +
250;450 +
proximal +
80;250 +
bisexual +
dispersed +
subsessile +
singly +
indeterminate +
homogamous +
true +
surrounding +
campanulate;urceolate +
alternate +
prickly +
scarious +
distinct +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
falling +
sessile +
stipitate-glandular +
dilated +
tough +
thick +
connate +
sessile +
persistent +
longer +
stipitate-glandular +
unequal +
equal +
Sp. Pl. +
1753 +
epaleate +
glabrous +
pitted +
flat;convex +
fibrous +
exalbuminous +
modifed +
2;3 +
alternate +
branched +
erect +
2-branched +
hirsute +
papillate +
Sonchus arvensis subsp. arvensis +
Sonchus arvensis +
subspecies +
usually larger +
equaling +
perennial +