Erigeron aphanactis

(A. Gray) Greene

Fl. Francisc., 389. 1897.

Endemic
Basionym: Erigeron concinnus var. aphanactis A. Gray Proc. Amer. Acad. Arts 6: 540. 1865 (as concinnum)
Treatment appears in FNA Volume 20. Treatment on page 291. Mentioned on page 260.

Perennials, 2–20 (–30) cm; taprooted, caudices branched. Stems erect to slightly decumbent-ascending, canescent-hirsute, densely stipitate-glandular. Leaves basal (persistent) and cauline (petioles prominently ciliate, at least on proximal portions, hairs thick-based, spreading); basal blades linear-oblanceolate to spatulate, 20–80 × 2–7 mm, cauline gradually or abruptly reduced distally, sometimes bractlike (stems scapiform), margins entire, faces canescent-hirsute, densely stipitate-glandular (hairs finer). Heads (disciform) 1–4. Involucres 4–6 × 7–15 mm. Phyllaries in 2–3 series, coarsely hirsute, densely minutely glandular. Ray (pistillate) florets 30–45; corollas usually tubular, lacking laminae, or laminae shorter than involucres. Disc corollas 2.8–4.5 mm (throats white-indurate and inflated, conspicuously puberulent). Cypselae 1.5–1.8 mm, 2-nerved, faces sparsely strigose (carpopodia whitish); pappi: outer of scales or setae, inner of 7–20 bristles.

Distribution

V20-609-distribution-map.gif

Ariz., Calif., Colo., N.Mex., Nev., Oreg., Utah

Discussion

Varieties 2 (2 in the flora).

Erigeron aphanactis is distinguished from E. austiniae by its conspicuously puberulent (versus essentially glabrous) disc corollas and white (versus yellow) carpopodia; it also is similiar in habit and vestiture to E. concinnus, which has conspicuous white to pinkish rays.

Selected References

None.

Key

1 Stems leafy; heads usually 2–3; disc corolla lobes usually yellowish Erigeron aphanactis var. aphanactis
1 Stems scapiform; heads 1; disc corolla lobes sometimes becoming reddish or purplish Erigeron aphanactis var. congestus
... more about "Erigeron aphanactis"
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) Greene +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
linear-oblanceolate +  and spatulate +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
decurrent +
Erigeron concinnus var. aphanactis +
linear;lanceolate oblanceolate or spatulate +
rugulose +  and muricate +
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 +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
fertile +  and bisexual +
Ariz. +, Calif. +, Colo. +, N.Mex. +, Nev. +, Oreg. +  and Utah +
strigose +, stipitate-glandular +  and canescent-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 />) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
turbinate;hemispheric +
0.7 cm7 mm <br />0.007 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
petiolate +  and sessile +
cauline +  and basal +
erect;spreading +
deltate +
Not (?) +  and Scarious (?) +
2-carpellate +
3-nerved +  and 1-nerved +
narrowly elliptic +  and linear-lanceolate +
Fl. Francisc., +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
branched +  and simple +
prostrate +  and decumbent +
erect +  and slightly decumbent-ascending +
appendaged +  and truncate +
papillate +  and smooth +
Achaetogeron +  and Trimorpha +
Erigeron aphanactis +
Erigeron +
species +
inflated +  and tubular +
20 cm200 mm <br />0.2 m <br /> (30 cm300 mm <br />0.3 m <br />) +
2 cm20 mm <br />0.02 m <br /> (20 cm200 mm <br />0.2 m <br />) +
tree +, shrub +  and subshrub +