Flora of North America species comparison

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Antennaria microphylla

Antennaria corymbosa

little-leaf pussytoes, pink pussytoes, rosy pussytoes, small pussytoes, white pussytoes

flat-top pussytoes, meadow pussytoes
Habit Dioecious. Dioecious.
Plants

9–30 cm (stems stipitate-glandular distally).

6–15 cm.
Stolons

1–5 cm.

1–10 cm.
Basal leaves

1-nerved, spatulate, 6–16 × 2–6 mm, tips mucronate, faces silvery gray-pubescent.

1-nerved, spatulate, 18–45 × 2–4 mm, tips mucronate, faces ± gray-tomentose.
Cauline leaves

linear, 5–25 mm, not flagged (apices acute).

linear, 8–13 mm, not flagged (apices acuminate).
Involucres

staminate 5–6.5 mm; pistillate 5.5–7 mm.

staminate 4–5.3 mm; pistillate 4–5 mm.
Corollas

staminate 2.5–3 mm; pistillate 3–4.3 mm.

staminate 2–3.2 mm; pistillate 2.5–3.5 mm.
Phyllaries

distally bright white to light yellow.

(bases each with distinct dark brown or blackish spot) distally white or light brown.
Heads

6–13 in corymbiform arrays.

3–7 in corymbiform arrays.
Cypselae

0.7–1.2 mm, glabrous or sparingly papillate;

pappi: staminate 3–4 mm; pistillate 3–5 mm.

0.5–1 mm, slightly papillate;

pappi: staminate 2.5–3.5 mm; pistillate 3.5–4.5 mm.
2n

= 28.

= 28.

Antennaria microphylla

Antennaria corymbosa
Phenology Flowering early–mid summer. Flowering early–mid summer.
Habitat Moist open areas, flood plains of streams, margins of alkaline depressions, lower montane to subalpine (subarctic) Moist subalpine-alpine willow thickets in the Rocky and Cascade mountains, the Sierra Nevada and mountains of the Great Basin
Elevation 0–3200 m (0–10500 ft) 1900–3500 m (6200–11500 ft)
Distribution
from FNA
AK; AZ; CA; CO; ID; MN; MT; ND; NE; NM; NV; OR; SD; UT; WA; WY; AB; BC; MB; NT; NU; ON; QC; SK; YT
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; CO; ID; MT; NM; NV; OR; UT; WA; WY
[WildflowerSearch map]
[BONAP county map]
Discussion

Antennaria microphylla is a primary sexual progenitor of the A. rosea polyploid agamic complex (R. J. Bayer 1990b). A. Cronquist (1955) included A. rosea within his circumscription of A. microphylla. It is preferable to recognize sexual diploids as distinct from their morphologically discrete hybrid apomictic derivatives. Antennaria microphylla is always dioecious and has stems distally stipitate-glandular and white phyllaries; A. rosea is always gynoecious and has stems without glandular hairs and phyllaries only occasionally white.

Some authors (A. E. Porsild 1950; E. H. Moss 1959; Porsild and W. J. Cody 1980) have recognized A. nitida as distinct; comparisons of the nomenclatural types of the two show that they are conspecific. Antennaria microphylla has allelopathic properties (G. D. Manners and D. S. Galitz 1985).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Antennaria corymbosa is characterized by linear-oblanceolate basal leaves and white-tipped phyllaries, each with a distinct black spot near the base of the scarious portion. A form with black phyllaries (A. acuta) occurs sporadically throughout the range of the species (R. J. Bayer 1988). Antennaria corymbosa is a sexual progenitor of the A. rosea complex.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 407. FNA vol. 19, p. 407.
Parent taxa Asteraceae > tribe Gnaphalieae > Antennaria Asteraceae > tribe Gnaphalieae > Antennaria
Sibling taxa
A. alpina, A. anaphaloides, A. arcuata, A. argentea, A. aromatica, A. corymbosa, A. densifolia, A. dimorpha, A. dioica, A. flagellaris, A. friesiana, A. geyeri, A. howellii, A. lanata, A. luzuloides, A. marginata, A. media, A. monocephala, A. neglecta, A. parlinii, A. parvifolia, A. plantaginifolia, A. pulchella, A. pulcherrima, A. racemosa, A. rosea, A. rosulata, A. soliceps, A. solitaria, A. stenophylla, A. suffrutescens, A. umbrinella, A. virginica
A. alpina, A. anaphaloides, A. arcuata, A. argentea, A. aromatica, A. densifolia, A. dimorpha, A. dioica, A. flagellaris, A. friesiana, A. geyeri, A. howellii, A. lanata, A. luzuloides, A. marginata, A. media, A. microphylla, A. monocephala, A. neglecta, A. parlinii, A. parvifolia, A. plantaginifolia, A. pulchella, A. pulcherrima, A. racemosa, A. rosea, A. rosulata, A. soliceps, A. solitaria, A. stenophylla, A. suffrutescens, A. umbrinella, A. virginica
Synonyms A. bracteosa, A. microphylla var. solstitialis, A. nitida, A. rosea var. nitida, A. solstitialis A. acuta, A. dioica var. corymbosa, A. hygrophila, A. nardina
Name authority Rydberg: Bull. Torrey Bot. Club 24: 303. (1897) E. E. Nelson: Bot. Gaz. 27: 212. (1899)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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