Agoseris glauca

(Pursh) Rafinesque

Herb. Raf., 39. 1833.

Common names: Prairie agoseris
IllustratedEndemic
Basionyms: Troximon glaucum Pursh Fl. Amer. Sept. 2: 505. 1813
Treatment appears in FNA Volume 19. Treatment on page 326. Mentioned on page 325, 328, 329.

Stems 0. Leaves erect to decumbent; petioles rarely purplish, petiole margins glabrous or pubescent, not usually ciliate; blades lanceolate to oblanceolate, 2–46 cm, margins usually entire, sometimes dentate, rarely lobed or lacerate, lobes 2–3 pairs or irregularly arranged, lanceolate, spreading, lobules 0, faces glabrous and glaucous or sparsely villous to tomentose. Peduncles not notably elongating after flowering, 5–60 (–90) cm in fruit, glabrous or glabrate, or apically puberulent to lanate, sometimes stipitate-glandular. Involucres obconic to hemispheric, 1–3 cm in fruit. Phyllaries in 2–3 series, green or medially rosy purple, often with purple-black spots, midstripe, and/or tips, subequal to unequal, margins glabrous or ± hairy, not usually ciliate, faces glabrous or tomentose, sometimes stipitate-glandular or eglandular; outer erect or spreading, apices adaxially glabrous or hirsuto-villous; inner erect, not notably elongating in fruit. Receptacles epaleate or paleate. Florets 15–150; corollas yellow, tubes 4–18 mm, ligules 6–24 × 2–5 mm; anthers 3–7 mm. Cypselae 7–15 mm, bodies fusiform to narrowly conic, 5–9 mm, tapered to stout beaks 1–4 mm, lengths mostly less than 1/2 times bodies; ribs flattened to ridged, glabrous, or distally scabrous; pappi in 2–3 series, 8–18 mm. 2n = 18, 36

Distribution

V19-494-distribution-map.gif

Alta., B.C., Man., N.W.T., Ont., Sask., Yukon, Ariz., Calif., Colo., Idaho, Mich., Minn., Mont., N.Dak., N.Mex., Nev., Oreg., S.Dak., Utah, Wash., Wyo.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Receptacles epaleate; leaf blades usually glabrous and glaucous, rarely sparsely hairy; peduncles (distally, and phyllaries) usually glabrous, some- times puberulent, eglandular Agoseris glauca var. glauca
1 Receptacles usually ± paleate; leaf blades usually puberulent to densely villous, sometimes glabrous; peduncles (distally, and phyllaries) usually villous to lanate or tomentose, sometimes glabrous, often stipitate-glandular Agoseris glauca var. dasycephala

"fine" is not a number."elongating" is not a number.

... more about "Agoseris glauca"
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
hirsuto-villous +  and glabrous +
scarious +
ovate +  and lanceolate +
corymbiform +  and paniculiform +
indeterminate +  and determinate +
Gary I. Baird +
(Pursh) Rafinesque +
decurrent +
Troximon glaucum +
0-1/2 times bodies +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
compound +  and simple +
lanceolate;oblanceolate +
2 cm20 mm <br />0.02 m <br /> (46 cm460 mm <br />0.46 m <br />) +
tuberculate +, rugose +, muricate +  and smooth +
tapered;fusiform;narrowly conic +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
filiform +
2 (?) +  and 6 (?) +
acute +, linear-lanceolate +  and cuneate-oblanceolate +
Prairie agoseris +
pistillate +  and staminate +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
papillate +
tapered +, beaked +, flattened +, obcompressed +, compressed +, prismatic +, fusiform +, ellipsoid +, columnar +  and clavate +
Alta. +, B.C. +, Man. +, N.W.T. +, Ont. +, Sask. +, Yukon +, Ariz. +, Calif. +, Colo. +, Idaho +, Mich. +, Minn. +, Mont. +, N.Dak. +, N.Mex. +, Nev. +, Oreg. +, S.Dak. +, Utah +, Wash. +  and Wyo. +
stipitate-glandular +, tomentose +, glabrous +  and sparsely villous +
winged +  and beaked +
dispersed +
indeterminate +
each +  and sessile +
pistillate +  and staminate +
obconic;hemispheric +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
0.6 cm6 mm <br />0.006 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
lanceolate +
hairy +  and glabrous +
lacerate +, lobed +  and dentate +
spreading +  and erect +
2-carpellate +
pistillate +  and staminate +
0.8 cm8 mm <br />0.008 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
stipitate-glandular +, glabrate or apically puberulent +  and lanate +
pubescent +  and glabrous +
connate +  and distinct +
subequal +  and unequal +
Herb. Raf., +
paleate +  and epaleate +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
scabrous +  and glabrous +
flattened +  and ridged +
exalbuminous +
Illustrated +  and Endemic +
prostrate +  and ascending +
appendaged +  and truncate +
papillate +
Undefined tribe Lactuceae +
Agoseris glauca +
Agoseris +
species +
subequal +  and unequal +
0.4 cm4 mm <br />0.004 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
perennial +, biennial +  and annual +