Erigeron rybius

G. L. Nesom

Syst. Bot. 7: 457, fig. 1. 1982.

Common names: Sacramento Mountain fleabane
Endemic
Treatment appears in FNA Volume 20. Treatment on page 333. Mentioned on page 262, 267.

Perennials, 15–35 cm; rhizomatous, fibrous-rooted, primary rhizomes slender, with systems of lignescent, branched rhizomes and slender, herbaceous, scale-leaved stolons bearing terminal leaf tufts. Stems erect, moderately to densely hirsute to hirtellous (hairs retrorsely spreading), usually eglandular, sometimes sparsely minutely glandular. Leaves basal (and proximal cauline usually withering by flowering) and cauline; basal and proximal cauline blades elliptic-ovate to spatulate-obovate, 18–135 × 6–27 mm, margins entire to mucronulate or shallowly serrate, faces short-strigose to hirsute or hirsuto-villous; cauline blades becoming lanceolate and entire distal to midstems, nearly even-sized distally or mid largest (bases clasping to subclasping). Heads 1–6 (from branches on distal 1/3–1/2 of stems). Involucres 6–8 × 9–15 mm. Phyllaries in 3 (–4) series, moderately piloso-hirsute, usually eglandular, sometimes minutely glandular. Ray-florets 47–99; corollas 11–20 mm, laminae coiling at tips, white, drying white or lilac-tinged. Disc corollas 3.4–4.6 mm. Cypselae obovate to 1.8–2.1 mm, 2 (–4) -nerved, faces sparsely strigose; pappi: outer of setae, inner of 20–32 bristles. 2n = 18.


Phenology: Flowering Jul–Sep.
Habitat: Meadows, grassy forest openings, and disturbed areas, ponderosa pine, pine-oak-fir, fir, spruce-fir
Elevation: 1800–2800(–3300) m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Erigeron rybius"
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 +
G. L. Nesom +
1.8 cm18 mm <br />0.018 m <br /> (13.5 cm135 mm <br />0.135 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
decurrent +
linear;lanceolate oblanceolate or spatulate +
rugulose +  and muricate +
Sacramento Mountain fleabane +
not 2-lipped +  and actinomorphic +
yellow +, usually white +  and bluish or purplish +
1.1 cm11 mm <br />0.011 m <br /> (2 cm20 mm <br />0.02 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
fertile +  and bisexual +
0.34 cm3.4 mm <br />0.0034 m <br /> (0.46 cm4.6 mm <br />0.0046 m <br />) +
fertile +  and bisexual +
1800–2800(–3300) m +
strigose +, short-strigose +  and hirsute or hirsuto-villous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Meadows, grassy forest openings, and disturbed areas, ponderosa pine, pine-oak-fir, fir, spruce-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 />) +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
turbinate;hemispheric +
0.9 cm9 mm <br />0.009 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
lilac-tinged +, white +  and drying +
petiolate +  and sessile +
cauline +  and basal +
erect;spreading +
deltate +
more or less dentate to pinnatifid +  and entire +
entire +  and mucronulate or shallowly serrate +
Not (?) +  and Scarious (?) +
equal-sized +
2-carpellate +
Flowering Jul–Sep. +
piloso-hirsute +
narrowly elliptic +  and linear-lanceolate +
bearing subulate enations +, hairy +  and bristly +
lignescent +
exalbuminous +
prostrate +  and decumbent +
appendaged +  and truncate +
papillate +  and smooth +
Achaetogeron +  and Trimorpha +
slender +
Erigeron rybius +
Erigeron +
species +
inflated +  and tubular +
fibrous-rooted +  and rhizomatous +
90 cm900 mm <br />0.9 m <br /> (100 cm1,000 mm <br />1 m <br />) +
15 cm150 mm <br />0.15 m <br /> (35 cm350 mm <br />0.35 m <br />) +
tree +, shrub +  and subshrub +