Agoseris glauca var. glauca

IllustratedEndemic
Synonyms: Agoseris lacera Greene Agoseris lapathifolia Greene Agoseris longissima Greene Agoseris longula Greene Agoseris microdonta Greene Agoseris procera Greene Agoseris vicinalis Greene
Treatment appears in FNA Volume 19. Treatment on page 326. Mentioned on page 327.

Leaf-blades: margins ± straight, usually entire (most) to dentate, sometimes irregularly so, faces glabrous and glaucous, sometimes sparsely hairy. Peduncles usually glabrous, sometimes apically puberulent, eglandular. Involucres obconic to campanulate. Phyllaries usually green, sometimes medially rose-purple, often purple-black spotted and/or tipped, faces usually glabrous, sometimes proximally puberulent, margins ± straight, glabrous (most) or proximally puberulent; outer erect or spreading, usually abaxially glabrous (most). Receptacles epaleate. Cypselae usually scabrous distally, sometimes glabrous. 2n = 18.


Phenology: Flowering May–Sep.
Habitat: Wet meadows, stream margins, swales, other moist sites, grasslands, steppes, and meadow habitats, slightly alkaline or saline sites, mostly in silts, clays, and other fine-textured soils
Elevation: 100–2500(–3300) m

Distribution

V19-495-distribution-map.gif

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

Discussion

Variety glauca is usually found at lower elevations from the northern prairies westward to valleys and basins of the North American cordillera. Misidentification is often due to falsely assuming this variety is strictly glabrous. Some regional phases have a high percentage of individuals with weakly puberulent peduncles and/or phyllaries. In addition, var. glauca intergrades with var. dasycephala in some locations.

Hybrids between var. glauca and other Agoseris species occur. Two have been described (as species). Agoseris glauca var. glauca × A. parviflora (= Agoseris ×agrestis Osterhout) occurs frequently in the foothills of the Rocky Mountains of Colorado. This is the basis for A. glauca var. agrestis (Osterhout) Q. Jones, a name that has been widely but mistakenly applied to many specimens of A. glauca var. dasycephala. Agoseris glauca var. glauca × A. monticola (= A. ×dasycarpa Greene) is found primarily on the Modoc Plateau of northeastern California and adjacent Oregon.

Selected References

None.

Lower Taxa

None.

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

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 +
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. +, Ont. +, Sask. +, Ariz. +, Calif. +, Colo. +, Idaho +, Mich. +, Minn. +, Mont. +, Nev. +, N.Mex. +, N.Dak. +, Oreg. +, S.Dak. +, Utah +, Wash. +  and Wyo. +
100–2500(–3300) m +
puberulent +, glabrous +, hairy +  and glaucous +
winged +  and beaked +
dispersed +
Wet meadows, stream margins, swales, other moist sites, grasslands, steppes, and meadow habitats, slightly alkaline or saline sites, mostly in silts, clays, and other fine-textured soils +
indeterminate +
each +  and sessile +
pistillate +  and staminate +
obconic;campanulate +
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 +
usually entire +  and dentate +
puberulent +  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 />) +
puberulent +  and glabrous +
pubescent +  and glabrous +
Flowering May–Sep. +
connate +  and distinct +
subequal +  and unequal +
Herb. Raf., +
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 +
Agoseris lacera +, Agoseris lapathifolia +, Agoseris longissima +, Agoseris longula +, Agoseris microdonta +, Agoseris procera +  and Agoseris vicinalis +
Agoseris glauca var. glauca +
Agoseris glauca +
variety +
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 +