Agoseris heterophylla

(Nuttall) Greene

Pittonia 2: 178. 1891.

Common names: Annual agoseris
Basionym: Macrorhynchus heterophyllus Nuttall Trans. Amer. Philos. Soc., n. s. 7: 430. 1841
Treatment appears in FNA Volume 19. Treatment on page 332. Mentioned on page 323, 324, 331.

Annuals. Stems 0 or 1 (erect, 0–5 cm). Leaves mostly erect, sometimes prostrate; petioles not purplish, margins glabrous or ciliate; blades usually oblanceolate to spatulate, rarely linear, 1–25 cm, margins entire or lobed; lobes 2–3 pairs, linear to spatulate, spreading to antrorse, lobules mostly 0, glabrous or densely hairy. Peduncles elongating after flowering, 3–60 cm in fruit, glabrous or glabrate, or basally puberulent and apically hairy to tomentose, sometimes stipitate-glandular. Involucres cylindric to hemispheric, 1–2 cm in fruit. Phyllaries in 2–3 series, green or medially rosy purple, sometimes purple-black spotted or tipped, subequal to unequal, margins glabrous or ciliate, faces usually puberulent to villous, mostly stipitate-glandular, sometimes glabrous; outer erect or spreading, adaxially usually villous to lanate, sometimes glabrous; inner erect, ± elongating after flowering. Receptacles epaleate. Florets 5–100 (–300); corollas yellow, tubes 1–5 mm, ligules 2–15 × 1–3 mm; anthers 1–4 mm. Cypselae 7–16 mm, bodies mostly fusiform to obconic, sometimes tumid, 2–5 (–10) mm, beaks 5–11 mm, lengths 1–4 times bodies, ribs 0 or alate, straight to strongly undulate, uniform or diminishing proximally; pappus bristles in 2–3 series, 4–9 mm.

Distribution

V19-511-distribution-map.gif

B.C., Ariz., Calif., Idaho, Mont., N.Mex., Nev., Oreg., Utah, Wash., nw Mexico (including Guadalupe Island), in Europe (Sweden)

Discussion

Varieties 3 (3 in the flora).

Selected References

None.

Key

1 Ligules 10–15 mm, much surpassing phyllaries; anthers 2–4 mm; leaf blades toothed to lobed, lobes mostly 3–4(–5) pairs Agoseris heterophylla var. cryptopleura
1 Ligules 2–4 mm, subequaling phyllaries; anthers 1–1.5 mm; leaf margins entire, toothed, or lobed, lobes mostly 2–3 pairs > 2
2 Peduncle lengths 0.5–3 times leaves at flowering; leaf blades glabrous abaxially, pubescent adaxially; peduncles mostly glabrate, or apically tomentose Agoseris heterophylla var. quentinii
2 Peduncle lengths mostly 1.5–4.5 times leaves at flowering; leaf blades uniformly glabrous or hairy; peduncles ± glabrate, or apically hairy to villous, sometimes glabrous Agoseris heterophylla var. heterophylla

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

... more about "Agoseris heterophylla"
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
scarious +
ovate +  and lanceolate +
corymbiform +  and paniculiform +
indeterminate +  and determinate +
Gary I. Baird +
(Nuttall) Greene +
decurrent +
Macrorhynchus heterophyllus +
1-4 times bodies +
0.5 cm5 mm <br />0.005 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
compound +  and simple +
usually oblanceolate;spatulate +
1 cm10 mm <br />0.01 m <br /> (25 cm250 mm <br />0.25 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
tuberculate +, rugose +, muricate +  and smooth +
tumid;mostly fusiform;obconic +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
filiform +
2 (?) +  and 6 (?) +
acute +, linear-lanceolate +  and cuneate-oblanceolate +
Annual 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. +, Ariz. +, Calif. +, Idaho +, Mont. +, N.Mex. +, Nev. +, Oreg. +, Utah +, Wash. +, nw Mexico (including Guadalupe Island) +  and in Europe (Sweden) +
glabrous +, stipitate-glandular +, usually puberulent +  and villous +
winged +  and beaked +
dispersed +
indeterminate +
each +  and sessile +
pistillate +  and staminate +
cylindric;hemispheric +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
0.2 cm2 mm <br />0.002 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
spreading;antrorse +
linear +  and spatulate +
hairy +  and glabrous +
ciliate +  and glabrous +
lobed +  and entire +
spreading +  and erect +
glabrous +, adaxially usually villous +  and lanate +
2-carpellate +
pistillate +  and staminate +
0.4 cm4 mm <br />0.004 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
stipitate-glandular +, apically hairy +  and tomentose +
3 cm30 mm <br />0.03 m <br /> (60 cm600 mm <br />0.6 m <br />) +
not purplish +
connate +  and distinct +
subequal +  and unequal +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
straight +
undulate +
diminishing +
exalbuminous +
prostrate +  and ascending +
appendaged +  and truncate +
papillate +
Undefined tribe Lactuceae +
Agoseris heterophylla +
Agoseris +
species +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +