Xylorhiza venusta

(M. E. Jones) A. Heller

Muhlenbergia 1: 8. 1900.

Common names: Charming woody-aster
Endemic
Basionym: Aster venustus M. E. Jones Zoë 2: 247. 1891
Synonyms: Machaeranthera venusta (M. E. Jones) Cronquist & D. D. Keck
Treatment appears in FNA Volume 20. Treatment on page 408. Mentioned on page 406.

Perennials or subshrubs, 10–40 cm. Stems branched mostly in proximal 3/4 (leafy in proximal 1/2–2/3), densely villoso-puberulent to glabrate, eglandular. Leaf-blades oblanceolate to oblong-spatulate, 2–15 mm wide, bases attenuate, not clasping, margins flat, entire, faces densely villoso-puberulent to glabrate. Peduncles 5–20 cm. Involucres 12–20 × 20–35 (–40) mm. Ray-florets 14–34; corollas white to pale lavender. Style-branch appendages shorter than stigmatic lines. 2n = 12, 24.


Phenology: Flowering Apr–Jun.
Habitat: Barren, open sites, often selenious, alkaline, dominated by saltbush and shadscale
Elevation: 1300–2100 m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Xylorhiza venusta"
stipitate-glandular +, sparsely tomentose +  and villous +
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 +
(M. E. Jones) A. Heller +
attenuate +
Aster venustus +
linear;lanceolate or oblanceolate oblong or narrowly elliptic +
rugulose +  and muricate +
Charming woody-aster +
not 2-lipped +  and actinomorphic +
white +  and pale lavender +
fusiform +  and linear or ovoid more or less compressed +
fertile +  and bisexual +
fertile +  and bisexual +
Colo. +  and Utah. +
1300–2100 m +
densely villoso-puberulent +  and glabrate +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Barren, open sites, often selenious, alkaline, dominated by saltbush and shadscale +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
3.5 cm35 mm <br />0.035 m <br /> (4 cm40 mm <br />0.04 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (2 cm20 mm <br />0.02 m <br />) +
campanulate;hemispheric +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
oblanceolate;oblong-spatulate +
subpetiolate +  and sessile +
triangular +
2-carpellate +
persistent +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
Flowering Apr–Jun. +
lanceolate +
Muhlenbergia +
bearing subulate enations +, hairy +  and bristly +
concave;usually flat;conic +
exalbuminous +
eglandular +  and branched +
densely villoso-puberulent +  and glabrate +
appendaged +  and truncate +
papillate +  and smooth +
Machaeranthera venusta +
Xylorhiza venusta +
Xylorhiza +
species +
shorter to longer +
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
80 cm800 mm <br />0.8 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +