Antennaria monocephala subsp. monocephala

Illustrated
Synonyms: A. exilis Greene A. monocephala var. exilis (Greene) Hultén A. monocephala var. latisquamea Hultén A. monocephala subsp. philonipha A. nitens A. E. Porsild A. philonipha A. shumaginensis
Treatment appears in FNA Volume 19. Mentioned on page 390, 412, 415.

Dioecious (staminates and pistillates in equal frequencies in populations). Stems stipitate-glandular. Basal leaves narrowly spatulate to oblanceolate, mostly abaxially tomentose, adaxially green-glabrous to glabrescent, sometimes both gray-pubescent. 2n = 28.


Phenology: Flowering summer.
Habitat: Moist tundra, often on disturbed margins of solifluction lobes or on unstable, gravelly slopes
Elevation: 0–1800 m

Distribution

V19-673-distribution-map.gif

B.C., N.W.T., Yukon, Alaska, Russian Far East (Chukotka Peninsula)

Discussion

E. Hultén’s (1968) key distinctions between subsp. monocephala and subsp. philonipha are obscure and seemingly arbitrary (R. J. Bayer 1991). Antennaria exilis is a pubescent form of A. monocephala; complete intergradation occurs between the forms. Taxonomic recognition for the two forms does not seem warranted. Antennaria monocephala subsp. monocephala is the diploid progenitor of the apomictic clones that make up subsp. angustata, and a progenitor of the A. alpina agamic complex.

Selected References

None.

Lower Taxa

None.
gray-pubescent +, green-glabrescent +  and glabrous +
scarious +
mostly ovate +  and lanceovate or linear +
subcapitate +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Randall J. Bayer +
de Candolle in A. P. de Candolle and A. L. P. P. de Candolle +
0.9 cm9 mm <br />0.009 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
decurrent +
compound +  and simple +
spatulate;oblanceolate;spatulate;oblanceolate;linear;lanceolate;elliptic;cuneate +
5-ribbed +, 3-ribbed +  and 2-ribbed +
muriculate +, papillate +  and smooth +
0.4 cm4 mm <br />0.004 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
pistillate +  and staminate +
red +, yellow +  and white +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
mostly ellipsoid +  and ovoid +
pistillate +  and staminate +
B.C. +, N.W.T. +, Yukon +, Alaska +  and Russian Far East (Chukotka Peninsula) +
0–1800 m +
papillate +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Moist tundra, often on disturbed margins of solifluction lobes or on unstable, gravelly slopes +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
pistillate +  and staminate +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
campanulate;cylindric +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
rarely lanceovate +  and lanceolate +
2-carpellate +
pistillate +  and staminate +
persistent +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering summer. +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
bearing subulate enations +, hairy +  and bristly +
flat;convex or ovoid +
exalbuminous +
Illustrated +
appendaged +  and truncate +
papillate +
A. exilis +, A. monocephala var. exilis +, A. monocephala var. latisquamea +, A. monocephala subsp. philonipha +, A. nitens +, A. philonipha +  and A. shumaginensis +
Antennaria monocephala subsp. monocephala +
Antennaria monocephala +
subspecies +
mucronate +
25 cm250 mm <br />0.25 m <br /> (70 cm700 mm <br />0.7 m <br />) +
4 cm40 mm <br />0.04 m <br /> (25 cm250 mm <br />0.25 m <br />) +