Astranthium robustum

(Shinners) De Jong

Publ. Mus. Michigan State Univ., Biol. Ser. 2: 521. 1965.

Common names: Texas western-daisy
Endemic
Basionym: Astranthium integrifolium var. robustum Shinners Field & Lab. 18: 158. 1950
Treatment appears in FNA Volume 20. Treatment on page 204.

Annuals, taprooted. Stems usually 3–8, decumbent-ascending, sometimes 1, erect. Leaves: basal and proximal cauline 20–45 × 5–11 mm. Involucres 4–6.8 mm. Ray-florets 18–35; corolla laminae white or abaxially lavender, often drying pinkish, 8–13 mm. Disc-floret corollas 3.2–3.8 mm. Cypselae 1.4–2.1 × 0.7–1.2 mm, faces minutely, glandular-papillate-pebbly, uniformly sparsely to moderately glochidiate-hairy. 2n = 6.


Phenology: Flowering Mar–Jun.
Habitat: Disturbed sites in sandy or rocky soil, mesas, canyons, pine flats, roadsides, ditches
Elevation: 800–1400 m

Discussion

Astranthium robustum is known only from the trans-Pecos region.

Selected References

None.

Lower Taxa

None.

"[" is not declared as a valid unit of measurement for this property."]" is not declared as a valid unit of measurement for this property.

... more about "Astranthium robustum"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Guy L. Nesom +
(Shinners) De Jong +
decurrent +
Astranthium integrifolium var. robustum +
8 cm80 mm <br />0.08 m <br /> (12 cm120 mm <br />0.12 m <br />) +
spatulate-obovate +
1 cm10 mm <br />0.01 m <br /> (8 cm80 mm <br />0.08 m <br />) +
narrower +
rugulose +  and muricate +
barbellulate +  and barbellate +
Texas western-daisy +
not 2-lipped +  and actinomorphic +
yellow +, white +  and with blue to purplish blue midstripe +
pinkish +, lavender +  and white +
0.8 cm8 mm <br />0.008 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
compressed +, obovoid +  and oblanceoloid-obovoid +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
fertile +  and bisexual +
fertile +  and bisexual +
800–1400 m +
glochidiate-hairy +
glandular-papillate-pebbly +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Disturbed sites in sandy or rocky soil, mesas, canyons, pine flats, roadsides, ditches +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
hemispheric;campanulate +
0.4 cm4 mm <br />0.004 m <br /> (0.68 cm6.8 mm <br />0.0068 m <br />) +
20mm;45mm +
cauline +, proximal +  and basal +
0.5 cm5 mm <br />0.005 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
deltate +
inconspicuous +
broadly oblanceolate +  and linear-lanceolate +
blue +  and purplish blue +
2-carpellate +
coroniform +
Flowering Mar–Jun. +
Publ. Mus. Michigan State Univ., Biol. Ser. +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
erect +  and decumbent-ascending +
1 +, 3 +  and 8 +
appendaged +  and truncate +
papillate +  and smooth +
Compositae +
Astranthium robustum +
Astranthium +
species +
tubular-funnelform +
5 cm50 mm <br />0.05 m <br /> (50 cm500 mm <br />0.5 m <br />) +
tree +, shrub +  and subshrub +
5 +, 4 +  and 3 +