Erigeron greenei

G. L. Nesom

Sida 21: 28. 2004.

Common names: Greene’s narrow-leaf fleabane
EndemicConservation concern
Basionym: Erigeron angustatus (A. Gray) Greene Bull. Calif. Acad. Sci. 1: 88. 1885,
Treatment appears in FNA Volume 20. Treatment on page 313. Mentioned on page 261.

Perennials, 30–90 cm; taprooted, caudices simple or branches relatively short and slender, woody. Stems erect (arising from rootcrowns or caudex branches), glabrous, eglandular. Leaves mostly cauline; blades linear, 10–60 × 0.1–1 (–2) mm, barely reduced distally, margins entire, ciliate, faces glabrous, eglandular. Heads (discoid) 1 or 2–5 in loosely corymbiform arrays. Involucres 5.5–7.5 × 8–12 mm. Phyllaries in 3–5 series (apices purplish), glabrous, minutely glandular. Ray (pistillate) florets 0. Disc corollas 4.2–6 mm (throats slightly indurate, not inflated). Cypselae 2.4–2.8 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of 26–38 bristles.


Phenology: Flowering May–Sep.
Habitat: Chaparral or open woods, ponderosa or jeffrey pine, Douglas fir, usually over serpentine, sometimes rocky alluvium
Elevation: (100–)500–1600 m

Discussion

Of conservation concern.

Selected References

None.

Lower Taxa

None.
... more about "Erigeron greenei"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
Guy L. Nesom +
G. L. Nesom +
decurrent +
Erigeron angustatus +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
linear;lanceolate oblanceolate or spatulate +
reduced +
0.1mm;1mm +
rugulose +  and muricate +
slender +
Greene’s narrow-leaf 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 +
0.42 cm4.2 mm <br />0.0042 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
fertile +  and bisexual +
(100–)500–1600 m +
strigose +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Chaparral or open woods, ponderosa or jeffrey pine, Douglas fir, usually over serpentine, sometimes rocky alluvium +
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 />) +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
turbinate;hemispheric +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
petiolate +  and sessile +
erect;spreading +
deltate +
Not (?) +  and Scarious (?) +
2-carpellate +
Flowering May–Sep. +
3-nerved +  and 1-nerved +
narrowly elliptic +  and linear-lanceolate +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
Endemic +  and Conservation concern +
prostrate +  and decumbent +
appendaged +  and truncate +
papillate +  and smooth +
Achaetogeron +  and Trimorpha +
Erigeron greenei +
Erigeron +
species +
inflated +  and tubular +
90 cm900 mm <br />0.9 m <br /> (100 cm1,000 mm <br />1 m <br />) +
30 cm300 mm <br />0.3 m <br /> (90 cm900 mm <br />0.9 m <br />) +
tree +, shrub +  and subshrub +