Erigeron philadelphicus

Linnaeus

Sp. Pl. 2: 863. 1753.

Common names: Philadelphia fleabane vergerette de Philadelphie
IllustratedEndemic
Treatment appears in FNA Volume 20. Treatment on page 319. Mentioned on page 263, 320.

Annuals, biennials, or short-lived perennials, 4–80 cm; fibrous-rooted, caudices simple. Stems erect (green proximally, leafy to arrays), hirsuto-villous to villous proximally, loosely strigose to sparsely hirsute distally, minutely glandular. Leaves basal (persistent or withering by flowering) and cauline; basal blades oblanceolate to obovate, (15–) 30–110 (–150) × 10–25 (–40) mm, margins shallowly crenate to coarsely serrate or pinnately lobed, faces sparsely hirsute to villous, eglandular; cauline blades oblong-oblanceolate to lanceolate, gradually reduced distally (bases clasping to auriculate-clasping). Heads (1–) 3–35 usually in corymbiform arrays (ultimate branches arising near stem tips). Involucres 4–6 × 6–15 mm. Phyllaries in 2–3 series (sometimes basally connate), hirsuto-villous to sparsely hirsute or glabrous, sometimes minutely glandular. Ray-florets 150–250 (–400); corollas usually white, sometimes pinkish, 5–10 mm, laminae not coiling or tardily coiling. Disc corollas 2.1–3.2 mm. Cypselae 0.6–1.1 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of 15–20 (–30) bristles.

Distribution

V20-715-distribution-map.gif

Alta., B.C., Man., N.B., N.S., N.W.T., Nfld. and Labr. (Nfld.), Ont., P.E.I., Que., Sask., Yukon, Ala., Ark., Calif., Colo., Conn., D.C., Del., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Mass., Md., Mich., Minn., Miss., Mo., Mont., N.C., N.Dak., N.H., N.J., N.Mex., N.Y., Nebr., Nev., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Va., Vt., W.Va., Wash., Wis., Wyo., worldwide in temperate areas as a weed

Discussion

Varieties 3 (3 in the flora).

Selected References

None.

Key

1 Cauline leaf faces sparsely hirsute to villous Erigeron philadelphicus var. philadelphicus
1 Cauline leaf faces glabrous or glabrate > 2
2 Leaves of basal rosettes withering by flowering; salt marshes, British Columbia Erigeron philadelphicus var. glaber
2 Leaves of basal rosettes persistent through flowering; crevices in shale or dolomite, usually beside rivers or lakes, Ontario, Quebec, New York, and Vermont Erigeron philadelphicus var. provancheri
... more about "Erigeron philadelphicus"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
Guy L. Nesom +
Linnaeus +
11 cm110 mm <br />0.11 m <br /> (15 cm150 mm <br />0.15 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (4 cm40 mm <br />0.04 m <br />) +
3 cm30 mm <br />0.03 m <br /> (11 cm110 mm <br />0.11 m <br />) +
oblanceolate +  and obovate +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
decurrent +
linear;lanceolate oblanceolate or spatulate +
rugulose +  and muricate +
oblong-oblanceolate +  and lanceolate +
Philadelphia fleabane +  and vergerette de Philadelphie +
not 2-lipped +  and actinomorphic +
pinkish +  and white +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
subterete +, oblong +  and oblong-obovoid compressed +
fertile +  and bisexual +
0.21 cm2.1 mm <br />0.0021 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
fertile +  and bisexual +
Alta. +, B.C. +, Man. +, N.B. +, N.S. +, N.W.T. +, Nfld. and Labr. (Nfld.) +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Ala. +, Ark. +, Calif. +, Colo. +, Conn. +, D.C. +, Del. +, Fla. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Mass. +, Md. +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, N.C. +, N.Dak. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, Nebr. +, Nev. +, Ohio +, Okla. +, Oreg. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Va. +, Vt. +, W.Va. +, Wash. +, Wis. +, Wyo. +  and worldwide in temperate areas as a weed +
strigose +, sparsely hirsute +  and villous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
disciform +  and discoid +
in loose , corymbiform or paniculiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
turbinate;hemispheric +
0.6 cm6 mm <br />0.006 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
coiling +  and not coiling +
petiolate +  and sessile +
cauline +  and basal +
erect;spreading +
deltate +
more or less dentate to pinnatifid +  and entire +
shallowly crenate +  and coarsely serrate or pinnately lobed +
Not (?) +  and Scarious (?) +
2-carpellate +
3-nerved +  and 1-nerved +
hirsuto-villous +  and sparsely hirsute or glabrous +
narrowly elliptic +  and linear-lanceolate +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
Illustrated +  and Endemic +
branched +  and simple +
prostrate +  and decumbent +
appendaged +  and truncate +
papillate +  and smooth +
Achaetogeron +  and Trimorpha +
Erigeron philadelphicus +
Erigeron +
species +
inflated +  and tubular +
90 cm900 mm <br />0.9 m <br /> (100 cm1,000 mm <br />1 m <br />) +
perennial +, short-lived +, biennial +  and annual +
4 cm40 mm <br />0.04 m <br /> (80 cm800 mm <br />0.8 m <br />) +
tree +, shrub +  and subshrub +