Chrysothamnus vaseyi

(A. Gray) Greene

Erythea 3: 96. 1895.

Common names: Vasey’s rabbitbrush
Endemic
Basionym: Bigelowia vaseyi A. Gray Proc. Amer. Acad. Arts 12: 58. 1876
Treatment appears in FNA Volume 20. Treatment on page 191. Mentioned on page 188.

Shrubs, 10–30 cm; caudices woody, very branched, bark tan to dark gray, fibrous with age. Stems ascending, green becoming tan, glabrous or puberulent, resin-dotted to resinous. Leaves ascending to spreading; sessile; blades with faint midnerves, linear to oblanceolate, 10–40 × 1–2.5 mm, flat or sulcate, usually not twisted, margins eciliate or sparsely puberulent, apices acute to apiculate, faces usually glabrous, sometimes puberulent, usually gland-dotted, resinous. Heads in dense cymiform arrays (to 5 cm wide), sometimes overtopped by distal leaves. Involucres cylindric to obconic, (5–) 6–8 × 2–4 mm. Phyllaries 12–18 in 3–4 series, in weak vertical ranks, mostly tan, greenish apically, midnerves evident and ± expanded distally, ovate to elliptic, unequal, 1.5–7 × 1–1.8 mm, chartaceous, weakly keeled, margins scarious, ciliate to lacerate, apices acute to obtuse-rounded, faces glabrous or gland-dotted. Disc-florets 5–7; corollas 4.5–6.5 mm, lobes 1.2–1.7 mm; style-branches 2.5–3.8 mm, appendages 0.8–1.2 mm. Cypselae reddish-brown, cylindric to turbinate, 4–5 mm, 5–10-nerved, faces glabrous; pappi tan (fine), 3.5–5 mm. 2n = 18.


Phenology: Flowering summer–fall.
Habitat: Open woods (oak or ponderosa pine) and dry meadows
Elevation: 1700–2900 m

Distribution

V20-417-distribution-map.gif

Colo., Nev., N.Mex., Utah, Wyo.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Chrysothamnus vaseyi"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
Lowell E. Urbatsch +, Roland P. Roberts +  and Kurt M. Neubig +
(A. Gray) Greene +
tan +  and dark gray +
decurrent +
Bigelowia vaseyi +
twisted +  and sulcate +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
linear;oblanceolate +
1mm;2.5mm +
rugulose +  and muricate +
barbellulate +  and barbellate +
Vasey’s rabbitbrush +
not 2-lipped +  and actinomorphic +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
reddish-brown +
cylindric +  and turbinate +
fertile +  and bisexual +
Colo. +, Nev. +, N.Mex. +, Utah +  and Wyo. +
1700–2900 m +
resinous +
gland-dotted;gland-dotted +
glabrous +  and puberulent +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Open woods (oak or ponderosa pine) and dry meadows +
in condensed cymiform clusters +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
cylindric;obconic +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
erect;spreading +
triangular +  and lanceolate +
puberulent +  and eciliate +
ciliate +  and lacerate +
1.5mm +  and 7mm +
evident +  and faint +
keeled +, ovate +  and elliptic +
unequal +  and expanded +
1mm +  and 1.8mm +
2-carpellate +
persistent +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering summer–fall. +
greenish +  and tan +
lanceolate +  and ovate or obovate +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
resinous +
resin-dotted +  and green becoming tan +
appendaged +  and truncate +
papillate +  and smooth +
Vanclevea +
Chrysothamnus vaseyi +
Chrysothamnus +
species +
campanulate +
perennial +, biennial +  and annual +