Artemisia tripartita subsp. rupicola

Beetle

Rhodora 61: 82. 1959.

Treatment appears in FNA Volume 19. Treatment on page 518.

Shrubs, 5–15 cm. Leaves 1.5–3.5 × 1–2 cm; lobes lanceolate, 1–1.5 mm wide. Heads in paniculiform arrays (5–) 8–12 (–15) × (0.5–) 1–3 cm. Involucres 2–4 × 1.5–3 mm. Florets 3–11. Cypselae 1.8–2 mm.


Phenology: Flowering early–late summer.
Habitat: Shallow rocky soils, grasslands
Elevation: 2500–2900 m

Discussion

Subspecies rupicola is known only from the high, windy plains of south-central Wyoming. The continental divide separates subsp. tripartita to the west and subsp. rupicola to the east. Because of its limited distribution and scant representation in herbaria, this distinct morphologic form escaped notice until it was described in 1959. Its dwarf habit and ecology distinguish it from subsp. tripartita.

Selected References

None.

Lower Taxa

None.
not tailed +  and obtuse +
scarious +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Leila M. Shultz +
Beetle +
decurrent +
Artemisia trifida +
compound +  and simple +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
3-lobed;cuneate +
0.5cm;2cm +
zygomorphic +, actinomorphic +  and (3-)5-merous +
red +  and pale-yellow +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
winged +  and monomorphic +
fertile +  and bisexual +
fertile +  and bisexual +
2500–2900 m +
gland-dotted +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
fertile +  and bisexual +
winged +  and beaked +
dispersed +
Shallow rocky soils, grasslands +
spiciform +  and paniculiform +
in subcapitate clusters +  and singly +
12 cm120 mm <br />0.12 m <br /> (15 cm150 mm <br />0.15 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
indeterminate +
8 cm80 mm <br />0.08 m <br /> (12 cm120 mm <br />0.12 m <br />) +
heterogamous +  and homogamous +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
each +  and sessile +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
turbinate;globose +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
sessile +  and petiolate +
gray-green +
deciduous +
1.5cm;3.5cm +
cauline +  and basal +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
lanceolate +
1mm +  and 1.5mm +
entire +  and dentate +
2-carpellate +
persistent +
Flowering early–late summer. +
2 +  and 20 +
styliferous +, neuter +  and pistillate +
sterile +  and fertile +
conic;convex;conic;convex;flat +
2 +  and 5 +
exalbuminous +
Illustrated +  and Endemic +
1 +  and 10 +
not wand-like +
appendaged +  and truncate +
papillate +
Artemisia tridentata subsp. trifida +  and Seriphidium tripartitum +
Artemisia tripartita subsp. rupicola +
Artemisia tripartita +
subspecies +
funnel +  and subglobose +
cylindric +
perennial +, biennial +  and annual +