Antennaria media

Greene

Pittonia 3: 286. 1898.

Common names: Rocky Mountain pussytoes
Endemic
Synonyms: Antennaria alpina var. media (Greene) Jepson Antennaria austromontana E. E. Nelson Antennaria candida Greene Antennaria densa Greene Antennaria modesta Greene Antennaria mucronata E. E. Nelson
Treatment appears in FNA Volume 19. Treatment on page 411. Mentioned on page 390, 395, 406, 415.

Dioecious or gynoecious (staminate plants rare or in equal frequency to pistillates, respectively). Plants 5–13 cm. Stolons 1–4 cm. Basal leaves 1-nerved, spatulate to oblanceolate, 6–19 × 2.5–6 mm, tips mucronate, faces gray-pubescent. Cauline leaves linear, 5–20 mm, not flagged (apices acute). Heads 2–5 (–9) in corymbiform arrays. Involucres: staminate (3.5–) 4.5–6.5 mm; pistillate 4–8 mm. Phyllaries distally dark-brown, black, or olivaceous. Corollas: staminate 2.5–4.5 mm; pistillate 3–4.5 mm. Cypselae 0.6–1.6 mm, glabrous or papillate; pappi: staminate 2.5–4.5 mm; pistillate 4–5.5 mm. 2n = 56, 98, 112.


Phenology: Flowering summer.
Habitat: Dry, rocky to moist alpine tundra
Elevation: 1500–3800 m

Distribution

V19-669-distribution-map.gif

Alta., B.C., N.W.T., Yukon, Alaska, Ariz., Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., Utah, Wash., Wyo.

Discussion

Antennaria media ranges from Arizona to Alaska; dioecious and gynoecious populations are encountered (R. J. Bayer and G. L. Stebbins 1987). The dioecious (sexual) populations are restricted primarily to California and Oregon (Bayer et al. 1990). The main distinction between A. media and A. alpina is flags on distal cauline leaves present in A. alpina and mostly absent in A. media (Bayer 1990d). Phyllaries of the pistillate plants in A. alpina tend to be acute; they are blunter in A. media. At some point, it may be preferable to follow W. L. Jepson ([1923–1925]) and some later authors and treat A. media as a subspecies of A. alpina. Antennaria media appears to be an autopolyploid derivative of A. pulchella; genes from A. pulchella may have introgressed into the A. alpina and A. parvifolia complexes indirectly through A. media.

Selected References

None.

Lower Taxa

None.
... more about "Antennaria media"
112 +, 98 +  and 56 +
more or less tomentose +  and sericeous or glabrescent +
scarious +
mostly ovate +  and lanceovate or linear +
indeterminate +  and determinate +
Randall J. Bayer +
Greene +
0.6 cm6 mm <br />0.006 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.6 cm6 mm <br />0.006 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 +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Rocky Mountain pussytoes +
pistillate +  and staminate +
red +, yellow +  and white +
0.3 cm3 mm <br />0.003 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
papillate +
mostly ellipsoid +  and ovoid +
pistillate +  and staminate +
Alta. +, B.C. +, N.W.T. +, Yukon +, Alaska +, Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, N.Mex. +, Oreg. +, Utah +, Wash. +  and Wyo. +
1500–3800 m +
gray-pubescent +
papillate +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Dry, rocky to moist alpine tundra +
in corymbiform , paniculiform , racemiform or subcapitate , arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
pistillate +  and staminate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
campanulate;cylindric +
0.4 cm4 mm <br />0.004 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 /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
Flowering summer. +
bearing subulate enations +, hairy +  and bristly +
flat;convex or ovoid +
exalbuminous +
appendaged +  and truncate +
papillate +
Antennaria alpina var. media +, Antennaria austromontana +, Antennaria candida +, Antennaria densa +, Antennaria modesta +  and Antennaria mucronata +
Antennaria media +
Antennaria +
species +
mucronate +
25 cm250 mm <br />0.25 m <br /> (70 cm700 mm <br />0.7 m <br />) +
gynoecious +  and dioecious +
4 cm40 mm <br />0.04 m <br /> (25 cm250 mm <br />0.25 m <br />) +