Artemisia pattersonii

A. Gray in A. Gray et al.

in A. Gray et al., Syn. Fl. N. Amer. ed. 2, 1(2): 453. 1886.

Common names: Patterson sagewort
Endemic
Synonyms: Artemisia monocephala (A. Gray) A. Heller Artemisia scopulorum var. monocephala A. Gray
Treatment appears in FNA Volume 19. Treatment on page 520. Mentioned on page 519.

Perennials, 8–20 cm, mildly aromatic. Stems gray-brown, glabrate or finely pubescent. Leaves deciduous, gray-green; petiolate; blades (basal) broadly spatulate, 2–4 × 0.5 cm, pinnately lobed (lobes ca. 1.5 mm wide; cauline smaller, 1-pinnately lobed or entire), faces silky-hairy. Heads borne singly or (2–5, spreading to nodding, pedunculate) in paniculiform or racemiform arrays 1–5 × 0.5–1 cm. Involucres broadly hemispheric, 5–8 × 5–8 (–10) mm. Phyllaries gray (margins dark-brown to black), villous. Florets: pistillate 7–27; bisexual 32–100; corollas (yellow tinged with red), 2–3 mm (including exsert anthers), mostly glabrous (embedded in tangled receptacular hairs). Cypselae 1.5–2 mm, glabrous. 2n = 14.


Phenology: Flowering mid–late summer.
Habitat: Alpine meadows
Elevation: 3500–4000 m

Discussion

Artemisia pattersonii can be distinguished from the closely related A. scopulorum by its heads being borne singly and narrower phyllary margins.

Selected References

None.

Lower Taxa

None.
... more about "Artemisia pattersonii"
not tailed +  and obtuse +
scarious +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Leila M. Shultz +
A. Gray in A. Gray et al. +
decurrent +
Undefined subg. Absinthium +
compound +  and simple +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
lobed;spatulate +
fertile +  and bisexual +
Patterson sagewort +
zygomorphic +, actinomorphic +  and (3-)5-merous +
red +  and pale-yellow +
winged +  and monomorphic +
fertile +  and bisexual +
fertile +  and bisexual +
Colo. +, N.Mex. +  and Wyo. +
3500–4000 m +
gland-dotted +
silky-hairy +
winged +  and beaked +
dispersed +
Alpine meadows +
racemiform +  and paniculiform +
indeterminate +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
heterogamous +  and homogamous +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
each +  and sessile +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
hemispheric +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
gray-green +
deciduous +
cauline +  and basal +
deltate +
entire +  and dentate +
2-carpellate +
persistent +
Flowering mid–late summer. +
2 +  and 20 +
in A. Gray et al., Syn. Fl. N. Amer. ed. +
styliferous +, neuter +  and pistillate +
sterile +  and fertile +
conic;convex;conic;convex;flat +
2 +  and 5 +
exalbuminous +
gray-brown +
1 +  and 10 +
not wand-like +
appendaged +  and truncate +
papillate +
Artemisia monocephala +  and Artemisia scopulorum var. monocephala +
Artemisia pattersonii +
Artemisia subg. Absinthium +
species +
funnel +  and subglobose +
cylindric +
8 cm80 mm <br />0.08 m <br /> (20 cm200 mm <br />0.2 m <br />) +
shrub +  and subshrub +