Erigeron nematophyllus

Rydberg

Bull. Torrey Bot. Club 32: 124. 1905.

Common names: Needle-leaf fleabane
Endemic
Treatment appears in FNA Volume 20. Treatment on page 293. Mentioned on page 276.

Perennials, 4–18 cm; taprooted, caudex branches relatively short, thick. Stems erect (greenish), usually closely appressed-strigose, sometimes glabrate, eglandular. Leaves mostly basal or basal (persistent, persistent portion relatively long and slender-fibrous) and cauline (greenish); basal blades 1-nerved linear to linear-oblanceolate or oblanceolate or narrowly spatulate, (20–) 30–80 × (0.5–) 1–3 mm, cauline reduced distally (bases attenuate, not thickened and whitish-indurate) margins entire (apices obtuse or rounded), faces abaxially glabrous or glabrate, adaxially sparsely strigose, eglandular. Heads 1 (–3 rarely, from branches at midstem). Involucres (3.5–) 4-–6.5 × (5–) 6–13 mm. Phyllaries in 2–4 series (greenish or sometimes purple, margins thickened), strigose to loosely strigoso-hirsute, sometimes more densely so on distal 1/3, sparsely minutely glandular. Ray-florets 15–55; corollas white to pink, 4–8 mm, laminae coiling. Disc corollas (2.8–) 3.5–4.3 mm. Cypselae 2.2–2.9 mm, 2-nerved, faces and margins villoso-hirsute, sometimes more densely so on nerves; pappi: outer of setae, inner of 15–25 bristles.


Phenology: Flowering May–Aug.
Habitat: Sagebrush to pinyon-juniper and yellow pine, shale and sandstone, ridges, bases of cliffs, shale gravel, clay flats with Artemisia
Elevation: 1700–2900 m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Erigeron nematophyllus"
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 +
Rydberg +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
3 cm30 mm <br />0.03 m <br /> (8 cm80 mm <br />0.08 m <br />) +
linear +  and linear-oblanceolate or oblanceolate or narrowly spatulate +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
decurrent +
linear;lanceolate oblanceolate or spatulate +
rugulose +  and muricate +
Needle-leaf fleabane +
not 2-lipped +  and actinomorphic +
white +  and pink +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
5-14-nerved +  and 2(-4)-nerved +
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 /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.43 cm4.3 mm <br />0.0043 m <br />) +
fertile +  and bisexual +
Colo. +, Utah +  and Wyo. +
1700–2900 m +
2-nerved +  and eglandular +
villoso-hirsute +, strigose +, glabrate +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Sagebrush to pinyon-juniper and yellow pine, shale and sandstone, ridges, bases of cliffs, shale gravel, clay flats with Artemisia +
disciform +  and discoid +
in loose , corymbiform or paniculiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
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 /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
turbinate;hemispheric +
0.6 cm6 mm <br />0.006 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
petiolate +  and sessile +
cauline +  and basal +
erect;spreading +
deltate +
villoso-hirsute +
reduced +
Not (?) +  and Scarious (?) +
2-carpellate +
Flowering May–Aug. +
3-nerved +  and 1-nerved +
strigose +  and loosely strigoso-hirsute +
narrowly elliptic +  and linear-lanceolate +
Bull. Torrey Bot. Club +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
prostrate +  and decumbent +
appendaged +  and truncate +
papillate +  and smooth +
Achaetogeron +  and Trimorpha +
Erigeron nematophyllus +
Erigeron +
species +
inflated +  and tubular +
90 cm900 mm <br />0.9 m <br /> (100 cm1,000 mm <br />1 m <br />) +
4 cm40 mm <br />0.04 m <br /> (18 cm180 mm <br />0.18 m <br />) +
tree +, shrub +  and subshrub +