Antennaria marginata

Greene

Pittonia 3: 290. 1898.

Common names: Whitemargin pussytoes
Synonyms: Antennaria dioica var. marginata (Greene) Jepson Antennaria fendleri Greene Antennaria marginata var. glandulifera A. Nelson Antennaria peramoena
Treatment appears in FNA Volume 19. Treatment on page 405. Mentioned on page 390, 392, 395, 404, 406, 409.

Dioecious or gynoecious (staminate plants in equal frequency as pistillates or none in populations, respectively). Plants 5–20 cm (stems sometimes stipitate-glandular, especially in dioecious diploids). Stolons 2–7 cm (woolly). Basal leaves 1–3-nerved, spatulate, 15–20 × 4–6 mm, tips mucronate, abaxial faces gray-tomentose, adaxial green-glabrous (margins white woolly). Cauline leaves linear, 7–16 mm, (apices acute) not flagged. Heads 5–8 in corymbiform arrays. Involucres: staminate 4.5–7 mm; pistillate 5–7 (–9) mm. Phyllaries (relatively wide), distally white (apices acuminate). Corollas: staminate 3–5 mm; pistillate 4.5–6.5 mm. Cypselae 0.8–2 mm, glabrous or slightly papillate; pappi: staminate 3.5–5.5 mm; pistillate 5.5–8.5 mm. 2n = 28, 56, 84, 112, 140.


Phenology: Flowering summer.
Habitat: Moist forests, slopes and tops of ridges under Douglas fir, ponderosa pine, Engelmann spruce or Gambel oaks, openings in the forests
Elevation: 1500–2900 m

Distribution

V19-653-distribution-map.gif

Ariz., Calif., Colo., N.Mex., Tex., Mexico (Chihuahua), Mexico (Coahuila)

Discussion

Antennaria marginata has rims of white hairs (from the abaxial faces) around its adaxially glabrous leaves. It has both dioecious and gynoecious populations and cytotypes ranging from diploid to decaploid (R. J. Bayer and G. L. Stebbins 1987). It is probably a primary sexual progenitor of the A. parvifolia polyploid complex; the two taxa sometimes overlap morphologically; they differ in induments of basal leaves. Antennaria marginata may also be a contributor to the parentage of the A. howellii and A. rosea agamic complexes.

Selected References

None.

Lower Taxa

None.
... more about "Antennaria marginata"
140 +, 112 +, 84 +, 56 +  and 28 +
scarious +
mostly ovate +  and lanceovate or linear +
indeterminate +  and determinate +
Randall J. Bayer +
Greene +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.4 cm4 mm <br />0.004 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 +
0.7 cm7 mm <br />0.007 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
Whitemargin pussytoes +
pistillate +  and staminate +
red +, yellow +  and white +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
papillate +
mostly ellipsoid +  and ovoid +
pistillate +  and staminate +
Ariz. +, Calif. +, Colo. +, N.Mex. +, Tex. +, Mexico (Chihuahua) +  and Mexico (Coahuila) +
1500–2900 m +
papillate +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Moist forests, slopes and tops of ridges under Douglas fir, ponderosa pine, Engelmann spruce or Gambel oaks, openings in the forests +
in corymbiform , paniculiform , racemiform or subcapitate , arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
pistillate +  and staminate +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
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 /> (0.7 cm7 mm <br />0.007 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
rarely lanceovate +  and lanceolate +
2-carpellate +
pistillate +  and staminate +
persistent +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.85 cm8.5 mm <br />0.0085 m <br />) +
Flowering summer. +
bearing subulate enations +, hairy +  and bristly +
flat;convex or ovoid +
exalbuminous +
appendaged +  and truncate +
papillate +
Antennaria dioica var. marginata +, Antennaria fendleri +, Antennaria marginata var. glandulifera +  and Antennaria peramoena +
Antennaria marginata +
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 />) +