Erigeron acomanus

Spellenberg & P. J. Knight

Madroño 36: 115, figs. 2. 1989.

Common names: Acoma fleabane
EndemicConservation concern
Treatment appears in FNA Volume 20. Treatment on page 303. Mentioned on page 275.

Perennials, 4.5–15 cm; taprooted, forming mats (10–70 cm diam.) connected by systems of lignescent rhizomes and caudex branches. Stems erect (grayish), sparsely strigillose (hairs whitish, stiff), eglandular. Leaves mostly basal (persistent, spreading or ascending, in rosettes at ends of caudex branches); (grayish) blades oblanceolate to narrowly obovate or spatulate, 8–23 × 2–7 mm, much reduced distally, margins entire (apices rounded to obtuse), faces moderately strigillose, eglandular. Heads 1. Involucres ca. 5 × 7–10 mm. Phyllaries in 3–4 series, lightly to moderately white-strigose, minutely glandular. Ray-florets 16–30; corollas white, 4.5–9 mm, laminae not coiling or reflexing, spreading. Disc corollas 2.5–3 mm. Cypselae 1.8–2 mm, 2-nerved, faces sparsely strigoso-hirsute; pappi: outer of setae, inner of 20–25 bristles. 2n = 18.


Phenology: Flowering late May–Jul.
Habitat: Shaded, sandy slopes accumulated at the bases of cliffs of Zuni sandstone and Entrada sandstone, pinyon-juniper woodland
Elevation: 2000–2300 m

Discussion

Of conservation concern.

Selected References

None.

Lower Taxa

None.
... more about "Erigeron acomanus"
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 +
Spellenberg & P. J. Knight +
decurrent +
0.8 cm8 mm <br />0.008 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
oblanceolate;narrowly obovate or spatulate +
reduced +
2mm;7mm +
rugulose +  and muricate +
Acoma fleabane +
not 2-lipped +  and actinomorphic +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
subterete +, oblong +  and oblong-obovoid compressed +
fertile +  and bisexual +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
fertile +  and bisexual +
2000–2300 m +
strigoso-hirsute +  and strigillose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Shaded, sandy slopes accumulated at the bases of cliffs of Zuni sandstone and Entrada sandstone, pinyon-juniper woodland +
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 />) +
5 cm50 mm <br />0.05 m <br /> (?) +
turbinate;hemispheric +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
spreading +  and reflexing +
not coiling +
petiolate +  and sessile +
erect;spreading +
deltate +
Not (?) +  and Scarious (?) +
2-carpellate +
Flowering late May–Jul. +
3-nerved +  and 1-nerved +
white-strigose +
narrowly elliptic +  and linear-lanceolate +
bearing subulate enations +, hairy +  and bristly +
lignescent +
exalbuminous +
Endemic +  and Conservation concern +
prostrate +  and decumbent +
appendaged +  and truncate +
papillate +  and smooth +
Achaetogeron +  and Trimorpha +
connected +
Erigeron acomanus +
Erigeron +
species +
inflated +  and tubular +
90 cm900 mm <br />0.9 m <br /> (100 cm1,000 mm <br />1 m <br />) +
4.5 cm45 mm <br />0.045 m <br /> (15 cm150 mm <br />0.15 m <br />) +
tree +, shrub +  and subshrub +