Erigeron bellidiastrum var. arenarius

(Greene) G. L. Nesom

Phytologia 69: 164. 1990.

Basionym: Erigeron arenarius Greene Bull. Torrey Bot. Club 25: 121. 1898
Treatment appears in FNA Volume 20. Treatment on page 339. Mentioned on page 338.

Stems moderately to intricately branched; proximal mostly 1–2 (–2.5) mm wide. Leaves: basal and proximal cauline blades oblanceolate, 20–40 × 3–8 mm, margins deeply dentate to pinnately lobed.


Phenology: Flowering Mar–Jun (or sporadically with rain).
Habitat: Open habitats in deep, loose sand, sometimes with oaks
Elevation: 800–1300 m

Distribution

V20-778-distribution-map.gif

N.Mex., Tex., Mexico (Chihuahua)

Discussion

Intergrades between var. arenarius and var. robustus occur in Ward and Winkler counties, Texas.

Selected References

None.

Lower Taxa

None.
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 +
(Greene) G. L. Nesom +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
decurrent +
Erigeron arenarius +
6 cm60 mm <br />0.06 m <br /> (8 cm80 mm <br />0.08 m <br />) +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
linear;oblanceolate or spatulate +
2mm;6mm +
rugulose +  and muricate +
not 2-lipped +  and actinomorphic +
white +  and bluish +
0.4 cm4 mm <br />0.004 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
subterete +, oblong +  and oblong-obovoid compressed +
fertile +  and bisexual +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
fertile +  and bisexual +
N.Mex. +, Tex. +  and Mexico (Chihuahua) +
800–1300 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Open habitats in deep, loose sand, sometimes with oaks +
disciform +  and discoid +
in loose , corymbiform or paniculiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.7 cm7 mm <br />0.007 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
turbinate;hemispheric +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
not coiling +
petiolate +  and sessile +
cauline +  and basal +
erect;spreading +
deltate +
more or less dentate to pinnatifid +  and entire +
deeply dentate +  and pinnately lobed +
Not (?) +  and Scarious (?) +
2-carpellate +
Flowering Mar–Jun (or sporadically with rain). +
3-nerved +  and 1-nerved +
narrowly elliptic +  and linear-lanceolate +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
Illustrated +
prostrate +  and decumbent +
erect +  and ascending +
appendaged +  and truncate +
papillate +  and smooth +
Achaetogeron +  and Trimorpha +
Erigeron bellidiastrum var. arenarius +
Erigeron bellidiastrum +
variety +
inflated +  and tubular +
30 cm300 mm <br />0.3 m <br /> (50 cm500 mm <br />0.5 m <br />) +
3.5 cm35 mm <br />0.035 m <br /> (30 cm300 mm <br />0.3 m <br />) +
tree +, shrub +  and subshrub +