Erigeron poliospermus

A. Gray in A. Gray et al.

in A. Gray et al., Syn. Fl. N. Amer. 1(2): 210. 1884.

IllustratedEndemic
Treatment appears in FNA Volume 20. Treatment on page 285. Mentioned on page 271.

Perennials, 3–15 cm; taprooted, caudices simple or with relatively short and thick branches. Stems erect, sometimes branched, hirsute (hairs unequal), ± minutely glandular. Leaves mostly basal (persistent; petioles prominently ciliate, hairs spreading, thick-based); blades narrowly oblanceolate to spatulate, (20–) 30–80 × 2–4 (–12) mm, cauline sometimes continuing distally to about midstem, margins entire, usually ciliate, sometimes coarsely so, faces sparsely to densely hirsute, sometimes minutely glandular. Heads 1 (–3) (from branches at or proximal to midstem). Involucres 5–9 × 9–20 mm. Phyllaries in 2–3 series, sparsely to densely hirsuto-villous to hirsute, minutely glandular. Ray-florets 15–45 or 0; corollas usually pink to bluish purple, sometimes white, 5–14 mm, laminae coiling. Disc corollas (3.5–) 4–5.5 mm. Cypselae 2.5–3 mm, 2-nerved, faces densely strigoso-sericeous (obscured); pappi: outer of setae, inner of 20–30 bristles.

Discussion

Varieties 3 (3 in the flora).

Selected References

None.

Key

1 Stems branched at or proximal to midstem; basal leaves and branches originating on elongate internodes from proximal 1–6 cm of primary stems; stems and involucres glabrous or sparsely hirsute, densely minutely glandular Erigeron poliospermus var. cereus
1 Stems simple; basal leaves and stems originating from compressed nodes at caudex apices; stems and involucres densely hirsute, sparsely minutely glandular > 2
2 Rays 0 Erigeron poliospermus var. disciformis
2 Rays 15–45 Erigeron poliospermus var. poliospermus
... more about "Erigeron poliospermus"
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 in A. Gray et al. +
decurrent +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
3 cm30 mm <br />0.03 m <br /> (8 cm80 mm <br />0.08 m <br />) +
narrowly oblanceolate;spatulate +
2mm;4mm +
rugulose +  and muricate +
with relatively short and thick branches +  and simple +
not 2-lipped +  and actinomorphic +
white +, usually pink +  and bluish purple +
0.5 cm5 mm <br />0.005 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
subterete +, oblong +  and oblong-obovoid compressed +
fertile +  and bisexual +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
fertile +  and bisexual +
B.C. +, Idaho +, Oreg. +  and Wash. +
strigoso-sericeous +  and hirsute +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
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 />) +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
turbinate;hemispheric +
0.9 cm9 mm <br />0.009 m <br /> (2 cm20 mm <br />0.02 m <br />) +
petiolate +  and sessile +
erect;spreading +
deltate +
Not (?) +  and Scarious (?) +
2-carpellate +
3-nerved +  and 1-nerved +
hirsuto-villous +  and hirsute +
narrowly elliptic +  and linear-lanceolate +
in A. Gray et al., Syn. Fl. N. Amer. +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
Illustrated +  and Endemic +
prostrate +  and decumbent +
appendaged +  and truncate +
papillate +  and smooth +
Achaetogeron +  and Trimorpha +
Erigeron poliospermus +
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 /> (15 cm150 mm <br />0.15 m <br />) +
tree +, shrub +  and subshrub +