Erigeron watsonii

(A. Gray) Cronquist

Brittonia 6: 207. 1947.

Common names: Watson’s fleabane
IllustratedEndemic
Basionym: Aster watsonii A. Gray Notes Compositae, 98. 1880
Treatment appears in FNA Volume 20. Treatment on page 304. Mentioned on page 272.

Perennials, 3–10 cm; taprooted, caudices sometimes multicipital, branches relatively short and thick, sometimes relatively long and slender. Stems ascending to decumbent-ascending, glabrous, eglandular. Leaves mostly basal (persistent); blades narrowly oblanceolate to spatulate (often folding), 15–60 × 1–5 mm, cauline abruptly reduced distally, margins entire, abaxial faces glabrous, adaxial sparsely strigose, eglandular. Heads 1 (–2). Involucres 4–7 × 5–10 mm. Phyllaries in 2–3 series (inner usually with purple margins), glabrous, minutely glandular. Ray-florets 13–25, corollas white to pink, 4–6 mm, laminae not coiling or reflexing, spreading. Disc corollas 2.8–4 mm. Cypselae 2–3.2 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of 25–35 (straw-colored, dull) bristles.


Phenology: Flowering Jul–Sep.
Habitat: Gravelly or rocky slopes, ridge tops, talus, soil pockets, sagebrush, limber pine-fir
Elevation: 2400–3300 m

Discussion

Selected References

None.

Lower Taxa

None.

"thick" is not a number.

... more about "Erigeron watsonii"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +, corymbiform +  and loose +
indeterminate +  and determinate +
Guy L. Nesom +
(A. Gray) Cronquist +
decurrent +
Aster watsonii +
1.5 cm15 mm <br />0.015 m <br /> (6 cm60 mm <br />0.06 m <br />) +
narrowly oblanceolate;spatulate +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
rugulose +  and muricate +
slender +
Watson’s fleabane +
not 2-lipped +  and actinomorphic +
white +  and pink +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
subterete +, oblong +  and oblong-obovoid compressed +
fertile +  and bisexual +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
fertile +  and bisexual +
Idaho +, Nev. +  and Utah. +
2400–3300 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Gravelly or rocky slopes, ridge tops, talus, soil pockets, sagebrush, limber pine-fir +
disciform +  and discoid +
in loose , corymbiform or paniculiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
turbinate;hemispheric +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
spreading +  and reflexing +
not coiling +
petiolate +  and sessile +
erect;spreading +
deltate +
not +  and scarious +
2-carpellate +
Flowering Jul–Sep. +
3-nerved +  and 1-nerved +
narrowly elliptic +  and linear-lanceolate +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
Illustrated +  and Endemic +
prostrate +  and decumbent +
ascending +  and decumbent-ascending +
appendaged +  and truncate +
papillate +  and smooth +
Achaetogeron +  and Trimorpha +
Erigeron watsonii +
Erigeron +
species +
inflated +  and tubular +
90 cm900 mm <br />0.9 m <br /> (100 cm1,000 mm <br />1 m <br />) +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
tree +, shrub +  and subshrub +