Artemisia tridentata subsp. wyomingensis

Beetle & A. M. Young

Rhodora 67: 405. 1965.

Common names: Wyoming sagebrush
Endemic
Synonyms: Artemisia tridentata var. wyomingensis (Beetle & A. M. Young) S. L. Welsh Seriphidium tridentatum subsp. wyomingense (Beetle & A. M. Young) W. A. Weber
Treatment appears in FNA Volume 19. Treatment on page 517. Mentioned on page 516, 518.

Shrubs, 30–50 (–150) cm (crowns rounded). Vegetative branches (stiffly spreading, often persisting, giving mature plants a twiggy appearance) interspersed among flowering-stems. Leaves narrowly to broadly cuneate, (0.4–) 0.7–1.1 (–2) × (0.1–) 0.2–0.3 cm, lobed (lobes rounded). Heads in paniculiform arrays 2–6 (–8) × 1–3 cm (often immersed in vegetative branches). Involucres (1–) 1.5–2 × 1.5–2 mm. Florets 4–8. Cypselae glabrous. 2n = 36, 54.


Phenology: Flowering mid summer–late fall.
Habitat: Rocky or fine-grained soils, cold-desert basins to high plateaus, foothills
Elevation: 800–2200 m

Distribution

V19-880-distribution-map.gif

Ariz., Calif., Colo., Idaho, Mont., Nebr., Nev., N.Mex., N.Dak., Oreg., S.Dak., Utah, Wash., Wyo.

Discussion

Subspecies wyomingensis is the common sagebrush of rocky or fine-grained soils from valleys to high plateaus in the Great Basin. It is an allopolyploid that may be derived from the populations of subsp. tridentata with which it occurs. Identification is based primarily on the shorter leaves of subsp. wyomingensis, its usually shorter stature, and its shorter flowering branches that are retained from year to year. Wyoming sagebrush may be increasing in abundance in response to increased grazing pressure and drought in the high valleys of the Great Basin.

Selected References

None.

Lower Taxa

None.
not tailed +  and obtuse +
scarious +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Leila M. Shultz +
Beetle & A. M. Young +
decurrent +
Tridentatae +
compound +  and simple +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
3-lobed;cuneate +
0.1cm;0.7cm +
Wyoming sagebrush +
zygomorphic +, actinomorphic +  and (3-)5-merous +
red +  and pale-yellow +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
winged +  and monomorphic +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, Nebr. +, Nev. +, N.Mex. +, N.Dak. +, Oreg. +, S.Dak. +, Utah +, Wash. +  and Wyo. +
800–2200 m +
gland-dotted +
pistillate +, staminate +  and neuter +
fertile +  and bisexual +
winged +  and beaked +
dispersed +
Rocky or fine-grained soils, cold-desert basins to high plateaus, foothills +
spiciform +  and racemiform +
in subcapitate clusters +  and singly +
6 cm60 mm <br />0.06 m <br /> (8 cm80 mm <br />0.08 m <br />) +
indeterminate +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
heterogamous +  and homogamous +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
each +  and sessile +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
lanceolate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
sessile +  and petiolate +
1.1 cm11 mm <br />0.011 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
gray-green +
persistent +
0.7cm;1.1cm +
cauline +  and basal +
lobed;cuneate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
deltate +
entire +  and dentate +
2-carpellate +
persistent +
Flowering mid summer–late fall. +
2 +  and 20 +
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 tridentata var. wyomingensis +  and Seriphidium tridentatum subsp. wyomingense +
Artemisia tridentata subsp. wyomingensis +
Artemisia tridentata +
subspecies +
funnel +  and subglobose +
cylindric +
perennial +, biennial +  and annual +