Chrysothamnus humilis

Greene

Pittonia 3: 24. 1896.

Common names: Truckee rabbitbrush
Endemic
Synonyms: Chrysothamnus viscidiflorus subsp. humilis H. M. Hall & Clements
Treatment appears in FNA Volume 20. Treatment on page 189. Mentioned on page 188.

Shrubs, 10–30 cm; with woody, branched caudices, bark becoming dark gray, fibrous with age. Stems ascending, green, sparsely to densely puberulent, sparsely glandular. Leaves ascending to spreading; sessile; blades with faint midnerves and pair of collaterals, narrowly elliptic to oblanceolate, 10–30 × 0.7–1.2 mm, flat to sulcate, apices acute (often apiculate), faces moderately puberulent, sparsely stipitate-glandular. Heads in densely cymiform arrays, often overtopped by distal leaves. Involucres turbinate, 6–10 × 3–4 mm. Phyllaries (12–) 14–18 in 3–4 series, ± in vertical ranks, mostly tan, sometimes green-tipped, ovate or oblong to elliptic, unequal, 2.5–7.5 × 1–1.8 mm, chartaceous, outer ± herbaceous wholly or distally, weakly keeled, midveins faint, apices acute to obtuse, faces sparsely puberulent. Disc-florets 2–3 (–4); corollas 5.5–8 mm, lobes 1–1.7 mm; style-branches 2–2.7 (–3.4) mm (included in or barely surpassing spreading corolla lobes), appendages 0.8–1.4 mm (lengths about equaling stigmatic portion). Cypselae reddish-brown, turbinate, 4–6 mm, densely hairy; pappi tan, 5–7 mm. 2n = 18.


Phenology: Flowering summer–fall.
Habitat: Sagebrush grasslands, open slopes in deserts, tolerant of alkali
Elevation: 1400–3100 m

Distribution

Calif., Idaho, Nev., Oreg., Wash.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Chrysothamnus humilis"
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 +
Greene +
decurrent +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
narrowly elliptic;oblanceolate +
0.7mm;1.2mm +
rugulose +  and muricate +
0.27 cm2.7 mm <br />0.0027 m <br /> (0.34 cm3.4 mm <br />0.0034 m <br />) +
barbellulate +  and barbellate +
Truckee rabbitbrush +
not 2-lipped +  and actinomorphic +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
reddish-brown +
turbinate +
fertile +  and bisexual +
Calif. +, Idaho +, Nev. +, Oreg. +  and Wash. +
1400–3100 m +
resinous +
gland-dotted +
puberulent +  and stipitate-glandular +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Sagebrush grasslands, open slopes in deserts, tolerant of alkali +
in condensed cymiform clusters +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
erect;spreading +
triangular +  and lanceolate +
hirtellous +  and ciliate +
2-carpellate +
persistent +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Flowering summer–fall. +
green-tipped +  and tan +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
oblong +  and elliptic +
0.1 cm1 mm <br />0.001 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
resinous +
appendaged +  and truncate +
papillate +  and smooth +
Chrysothamnus viscidiflorus subsp. humilis +
Chrysothamnus humilis +
Chrysothamnus +
species +
campanulate +
perennial +, biennial +  and annual +