Sphaeromeria potentilloides var. nitrophila

(Cronquist) A. H. Holmgren

Brittonia 28: 261. 1976.

IllustratedEndemic
Basionym: Tanacetum potentilloides var. nitrophilum Cronquist Leafl. W. Bot. 6: 49. 1950
Synonyms: Vesicarpa potentilloides var. nitrophilum (Cronquist) Kartesz
Treatment appears in FNA Volume 19. Treatment on page 500.

Plants 3–15 cm. Leaves mostly basal; basal mostly 1-pinnately lobed; cauline (2–) 3-fid or entire. Heads 1–3 (–4). Involucres 4–5.1 mm. 2n = 18.


Phenology: Flowering May–Jul.
Habitat: Highly alkaline sites
Elevation: 1600–2200 m

Discussion

Variety nitrophila grows in northern and central Nevada and in the hills north of Snake River Plains in Idaho.

Selected References

None.

Lower Taxa

None.
not tailed +  and obtuse +
scarious +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Timothy K. Lowrey +  and Leila M. Shultz +
(Cronquist) A. H. Holmgren +
decurrent +
Tanacetum potentilloides var. nitrophilum +
compound +  and simple +
lobed;3-toothed;lobed;obovate;cuneate or linear +
entire +  and (2-)3-fid +
zygomorphic +, actinomorphic +  and (3-)5-merous +
bright-yellow +
winged +  and monomorphic +
obovoid +  and obconic +
fertile +  and bisexual +
fertile +  and bisexual +
Calif. +, Idaho +  and Nev. +
1600–2200 m +
gland-dotted;gland-dotted +
silky-tomentose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Highly alkaline sites +
corymbiform +  and paniculiform +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
hemispheric;campanulate +
0.4 cm4 mm <br />0.004 m <br /> (0.51 cm5.1 mm <br />0.0051 m <br />) +
sessile +  and petiolate +
deltate +
entire +  and dentate +
2-carpellate +
persistent +
Flowering May–Jul. +
8 +  and 10 +
unequal +  and subequal +
styliferous +, neuter +  and pistillate +
sterile +  and fertile +
bearing subulate enations +, hairy +  and bristly +
conic;nearly flat +
5 +  and 10 +
exalbuminous +
Illustrated +  and Endemic +
gland-dotted +
sericeous +  and tomentose +
1 +  and 5 +
appendaged +  and truncate +
papillate +
Vesicarpa potentilloides var. nitrophilum +
Sphaeromeria potentilloides var. nitrophila +
Sphaeromeria potentilloides +
variety +
campanulate +
cylindric +
60 cm600 mm <br />0.6 m <br /> (70 cm700 mm <br />0.7 m <br />) +
3 cm30 mm <br />0.03 m <br /> (30 cm300 mm <br />0.3 m <br />) +
60 cm600 mm <br />0.6 m <br /> (70 cm700 mm <br />0.7 m <br />) +