Erigeron abajoensis

Cronquist

Brittonia 6: 168. 1947.

Common names: Abajo fleabane
EndemicConservation concern
Synonyms: Erigeron awapensis S. L. Welsh
Treatment appears in FNA Volume 20. Treatment on page 283. Mentioned on page 274.

Perennials, 5–15 (–24) cm; taprooted, caudices branches relatively thick and short, retaining old leaf-bases. Stems ascending to decumbent (greenish proximally), usually loosely strigose (hairs ascending, attenuate, basal-cells erect), uncommonly hirsute or hirtellous (hairs spreading-deflexed), eglandular. Leaves basal (persistent) and cauline; basal blades usually oblanceolate, 15–70 × 2–6 (–8) mm (bases attenuate), margins entire (apices rounded to obtuse); cauline blades linear to linear-oblong or narrowly lanceolate-oblong, mostly 10–40 × 1.5–4 mm, gradually reduced distally; faces strigose, eglandular. Heads 1–4. Involucres 3.7–5.2 × (5–) 10–11 mm. Phyllaries in 2–3 (–4) series, strigose to strigulose or finely hirsuto-villous, minutely glandular. Ray-florets 35–60; corollas blue to pink or white, 5–6 mm, laminae weakly coiling. Disc corollas 2.5–4 mm. Cypselae 1.5–2 mm, 2-nerved, faces strigose; pappi: outer of setae, inner of 12–20 bristles.


Phenology: Flowering Jul–Aug.
Habitat: Rocky or gravelly open slopes, sagebrush, pinyon-juniper, ponderosa pine, spruce-fir
Elevation: (2000–)2800–3500 m

Discussion

Of conservation concern.

Erigeron abajoensis is a segregate of E. caespitosus, separated from the latter only by its strigose (versus hirsute) stems and leaves and greater tendency for 1-nerved leaves. Further, some populations of E. abajoensis have plants variable in orientation of stem vestiture [both antrorsely appressed and deflexed; e.g., Cronquist 9430, Garfield Co., Utah (BRIT, NY); Heil and Clifford 17919, Apache Co., Ariz. (BRIT, SJNM)] and similar variation in cauline vestiture also occurs in E. caespitosus.

Selected References

None.

Lower Taxa

None.
... more about "Erigeron abajoensis"
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 +
Cronquist +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (7 cm70 mm <br />0.07 m <br />) +
oblanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
decurrent +
linear;lanceolate oblanceolate or spatulate +
rugulose +  and muricate +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
linear +  and linear-oblong or narrowly lanceolate-oblong +
Abajo fleabane +
not 2-lipped +  and actinomorphic +
blue +  and pink or white +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 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 /> (0.4 cm4 mm <br />0.004 m <br />) +
fertile +  and bisexual +
Ariz. +, N.Mex. +  and Utah. +
(2000–)2800–3500 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Rocky or gravelly open slopes, sagebrush, pinyon-juniper, ponderosa pine, spruce-fir +
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 /> (1 cm10 mm <br />0.01 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.37 cm3.7 mm <br />0.0037 m <br /> (0.52 cm5.2 mm <br />0.0052 m <br />) +
turbinate;hemispheric +
1 cm10 mm <br />0.01 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
petiolate +  and sessile +
cauline +  and basal +
erect;spreading +
deltate +
Not (?) +  and Scarious (?) +
2-carpellate +
Flowering Jul–Aug. +
3-nerved +  and 1-nerved +
strigose +  and strigulose or finely hirsuto-villous +
narrowly elliptic +  and linear-lanceolate +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
Endemic +  and Conservation concern +
prostrate +  and decumbent +
ascending +  and decumbent +
appendaged +  and truncate +
papillate +  and smooth +
Erigeron awapensis +
Erigeron abajoensis +
Erigeron +
species +
inflated +  and tubular +
15 cm150 mm <br />0.15 m <br /> (24 cm240 mm <br />0.24 m <br />) +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
tree +, shrub +  and subshrub +