Agoseris grandiflora

(Nuttall) Greene

Pittonia 2: 178. 1891.

Common names: Grassland agoseris
Endemic
Basionym: Stylopappus grandiflorus Nuttall Trans. Amer. Philos. Soc., n. s. 7: 432. 1841
Treatment appears in FNA Volume 19. Treatment on page 329. Mentioned on page 325, 328, 331, 333, 334.

Stems usually 0, rarely weakly developed. Leaves erect to ascending; petioles often purplish, margins ciliate to tomentose; blades usually linear to oblanceolate, rarely spatulate, 10–40 (–50) cm, margins usually dentate to lobed, or laciniately pinnatifid, rarely subentire, lobes 3–5 pairs, opposite to irregular, linear to lanceolate, usually antrorse, sometimes spreading; lobules often present, faces ± villous to canescent. Peduncles elongating after flowering, (15–) 25–60 (–96) cm in fruit, ± glabrate, or apically villous to tomentose, eglandular, sometimes bracteate. Involucres campanulate to hemispheric, 2–5 cm in fruit. Phyllaries in 4–5 series, green or medially rosy purple and/or spotted, subequal to unequal, margins occasionally dentate, ciliate or lanate, sometimes glabrous, faces glabrous or hairy, eglandular; outer subequal to or surpassing inner at flowering, spreading, adaxially tomentose; inner erect, greatly elongating after flowering. Receptacles epaleate. Florets 40–500; corollas yellow, tubes 4–7 (–10) mm, ligules 3–7 × ca. 1 mm; anthers 1–3 mm. Cypselae 9–28 mm, bodies fusiform, 3–7 mm, beaks 9–21 mm, lengths mostly 3–4 times bodies; ribs ridged to subalate, rarely nerviform, straight, ± glabrous; pappus bristles in 2–3 series, 7–15 mm. 2n = 18.

Distribution

V19-502-distribution-map.gif

B.C., Calif., Idaho, Mont., Nev., Oreg., Utah, Wash.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Leaves: margins dentate to lobed or pinnatifid, mostly 10–35 mm wide (excluding lobes), lobes ± lanceolate; florets (100–)150–300(–500+); outer phyllaries often medially rosy purple, not spotted, often longer than inner at flowering Agoseris grandiflora var. grandiflora
1 Leaves: margins laciniately to finely pinnatifid, mostly 2–4(–8) mm wide (excluding lobes), lobes filiform to linear; florets 40–60+; outer phyllaries often medially rosy purple and spotted, mostly subequal to inner at flowering Agoseris grandiflora var. leptophylla

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

... more about "Agoseris grandiflora"
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
scarious +
ovate +  and lanceolate +
corymbiform +  and paniculiform +
indeterminate +  and determinate +
Gary I. Baird +
(Nuttall) Greene +
decurrent +
Stylopappus grandiflorus +
3-4 times bodies +
0.9 cm9 mm <br />0.009 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
compound +  and simple +
40 cm400 mm <br />0.4 m <br /> (50 cm500 mm <br />0.5 m <br />) +
spatulate;usually linear;oblanceolate +
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
tuberculate +, rugose +, muricate +  and smooth +
fusiform +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
filiform +
2 (?) +  and 6 (?) +
acute +, linear-lanceolate +  and cuneate-oblanceolate +
Grassland 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 +
B.C. +, Calif. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +  and Wash. +
hairy +, glabrous +, less villous +  and canescent +
winged +  and beaked +
dispersed +
indeterminate +
each +  and sessile +
pistillate +  and staminate +
campanulate;hemispheric +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
opposite;irregular +
spreading;antrorse +
linear +  and lanceolate +
glabrous +, lanate +, ciliate +  and tomentose +
subentire +, usually dentate +  and lobed or laciniately pinnatifid +
2-carpellate +
pistillate +  and staminate +
0.7 cm7 mm <br />0.007 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
bracteate +  and eglandular +
less glabrate or apically villous +  and tomentose +
connate +  and distinct +
subequal +  and unequal +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
nerviform +  and subalate +
straight +
ridged +
exalbuminous +
prostrate +  and ascending +
appendaged +  and truncate +
papillate +
Undefined tribe Lactuceae +
Agoseris grandiflora +
Agoseris +
species +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
perennial +, biennial +  and annual +