Erigeron inornatus

(A. Gray) A. Gray

Notes Compositae, 88. 1880.

Common names: Lava rayless fleabane
Endemic
Basionym: Erigeron foliosus var. inornatus A. Gray in W. H. Brewer et al., Bot. California 1: 330. 1876 (as foliosum var. inornatum)
Treatment appears in FNA Volume 20. Treatment on page 314. Mentioned on page 260, 261, 316.

Perennials, 20–70 (–90) cm; taprooted, woody. Stems basally decumbent, abruptly erect, usually glabrous or glabrate, rarely sparsely strigose on proximal 1/2, or hirsutulous proximally and strigose distally, or distally densely hirsutulous (hairs usually ± deflexed, sometimes loosely antrorsely ascending; var. keilii), eglandular. Leaves cauline; blades narrowly oblong-oblanceolate to linear, 20–60 × 2–7 mm, seldom reduced distally, margins entire, faces glabrous, sparsely strigose, or hispid, eglandular. Heads (discoid) (1–) 2–15 in corymbiform arrays. Involucres 4.5–6.5 × 7–12 mm. Phyllaries in 3–5 series (margins broad, stramineous, midveins orange, thin), glabrous, usually eglandular, rarely minutely glandular. Ray (pistillate) florets 0. Disc corollas 3.8–4.5 mm (throats slightly indurate, not inflated). Cypselae 2–3 mm, 2-nerved, faces glabrous; pappi: outer of setae, inner of 28–45 bristles.

Discussion

Varieties 3 (3 in the flora).

Selected References

None.

Key

1 Distal stems densely hirsutulous (hairs slightly deflexed, sometimes densely ascending-strigose) Erigeron inornatus var. keilii
1 Distal stems usually sparsely strigose or glabrous > 2
2 Stems 10–20 cm, decumbent-ascending, hirsutulous (hairs spreading-deflexed) in proximal 1/2; proximal and mid leaf margins with stiff, spreading cilia, faces hispid; involucres 5–6.5 mm Erigeron inornatus var. calidipetris
2 Stems 30–70(–90) cm, basally ascending, distally erect, strigose in proximal 1/2; proximal and mid leaf margins eciliate, faces strigose; involucres 4.5–5.5 mm Erigeron inornatus var. inornatus
... more about "Erigeron inornatus"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
Guy L. Nesom +
(A. Gray) A. Gray +
decurrent +
Erigeron foliosus var. inornatus +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
narrowly oblong-oblanceolate;linear +
reduced +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
rugulose +  and muricate +
Lava rayless fleabane +
not 2-lipped +  and actinomorphic +
yellow +, usually white +  and bluish or purplish +
beaked +, 2-ribbed +  and 5-ribbed +
subterete +, oblong +  and oblong-obovoid compressed +
fertile +  and bisexual +
0.38 cm3.8 mm <br />0.0038 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
fertile +  and bisexual +
Calif. +, Nev. +, Oreg. +  and Wash. +
glabrous +, hispid +  and strigose +
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 />) +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
turbinate;hemispheric +
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
petiolate +  and sessile +
erect;spreading +
deltate +
not +  and scarious +
2-carpellate +
narrowly elliptic +  and linear-lanceolate +
Notes Compositae, +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
, +  and strigose +
hirsutulous +, strigose +, glabrate +  and glabrous +
appendaged +  and truncate +
papillate +  and smooth +
Achaetogeron +  and Trimorpha +
Erigeron inornatus +
Erigeron +
species +
inflated +  and tubular +
70 cm700 mm <br />0.7 m <br /> (90 cm900 mm <br />0.9 m <br />) +
20 cm200 mm <br />0.2 m <br /> (70 cm700 mm <br />0.7 m <br />) +
tree +, shrub +  and subshrub +