Agoseris hirsuta

(Hooker) Greene

Pittonia 2: 177. 1891.

Common names: Coast Range agoseris
Endemic
Basionym: Leontodon hirsutum Hooker Fl. Bor.-Amer. 1: 296. 1833
Synonyms: Macrorhynchus harfordii Kellogg Taraxacum hirsutum (Hooker) Torrey & A. Gray
Treatment appears in FNA Volume 19. Treatment on page 332. Mentioned on page 325, 331, 333.

Stems 0. Leaves erect to ascending; petioles rarely purplish, petiole margins glabrous or tomentose; blades narrowly to broadly oblanceolate, (7–) 10–30 cm, margins usually lobed to pinnatifid, rarely dentate, lobes 5–7 (–9) pairs, lanceolate to oblanceolate, spreading to antrorse, lobules sometimes present, faces sparsely to densely hairy. Peduncles not notably elongating after flowering, 10–45 cm in fruit, glabrate, or basally and apically pubescent to villous, mostly stipitate-glandular. Involucres obconic to campanulate, 1.5–2.5 cm in fruit. Phyllaries in 2–3 series, green or medially rosy purple, sometimes purple-black speckled, margins ciliate, faces ± villous, stipitate-glandular; outer erect to spreading, adaxially ± tomentose; inner erect, elongating after flowering. Receptacles epaleate. Florets 50–250; corollas yellow, tubes 3–6 mm, ligules 6–16 × 2–3 mm; anthers 3–5 mm. Cypselae 9–14 mm; bodies fusiform to narrowly conic, 3–5 mm, beaks 6–10 mm, lengths 1–3 times bodies, ribs flattened, ridged, or subalate, straight or slightly undulate; pappus bristles in 3–4 series, (4–) 6–10 mm. 2n = 18.


Phenology: Flowering mostly Apr–Jun, rarely Sep–Dec.
Habitat: Mesic to dry grasslands, oak woodlands, and coastal scrub-lands
Elevation: 10–700 m

Discussion

Agoseris hirsuta occurs primarily on grassy hills in the San Francisco Bay area and extends both north and south in the Coast Ranges. It has been treated as A. apargioides subsp. or var. apargioides in recent floras. Agoseris hirsuta is closely related to A. apargioides and A. heterophylla. Morphologically, it is similar to A. heterophylla var. cryptopleura. Putative hybrids with A. apargioides, A. grandiflora var. grandiflora, A. heterophylla var. cryptopleura, and A. retrorsa have been collected.

Selected References

None.

Lower Taxa

None.

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

... more about "Agoseris hirsuta"
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
scarious +
ovate +  and lanceolate +
corymbiform +  and paniculiform +
indeterminate +  and determinate +
Gary I. Baird +
(Hooker) Greene +
decurrent +
Leontodon hirsutum +
1-3 times bodies +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
compound +  and simple +
7 cm70 mm <br />0.07 m <br /> (10 cm100 mm <br />0.1 m <br />) +
oblanceolate +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
tuberculate +, rugose +, muricate +  and smooth +
fusiform;narrowly conic +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
filiform +
2 (?) +  and 6 (?) +
acute +, linear-lanceolate +  and cuneate-oblanceolate +
Coast Range 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 +
10–700 m +
stipitate-glandular +, villous +  and hairy +
winged +  and beaked +
dispersed +
Mesic to dry grasslands, oak woodlands, and coastal scrub-lands +
indeterminate +
each +  and sessile +
pistillate +  and staminate +
obconic;campanulate +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
0.6 cm6 mm <br />0.006 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
spreading;antrorse +
lanceolate +  and oblanceolate +
usually lobed +  and pinnatifid +
erect +  and spreading +
2-carpellate +
pistillate +  and staminate +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
stipitate-glandular +, apically pubescent +  and villous +
tomentose +  and glabrous +
Flowering mostly Apr–Jun, rarely Sep–Dec. +
connate +  and distinct +
subequal +  and unequal +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
straight +
undulate +, ridged +  and flattened +
exalbuminous +
prostrate +  and ascending +
appendaged +  and truncate +
papillate +
Macrorhynchus harfordii +  and Taraxacum hirsutum +
Agoseris hirsuta +
Agoseris +
species +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
perennial +, biennial +  and annual +