Flora of North America species comparison

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Antennaria microphylla

Antennaria dimorpha

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

cushion pussytoes, gray cushion pussytoes, low or two-form or cushion pussytoes, low pussytoes
Habit Dioecious. Dioecious.
Plants

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

0.5–4 cm.
Stolons

1–5 cm.

none.
Basal leaves

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

1-nerved, linear to narrowly spatulate, 8–11 × 1–1.2 mm, tips acute, faces ± gray-tomentose.
Cauline leaves

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

linear or oblanceolate, 7–12 mm, not flagged (apices acute).
Involucres

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

staminate 6–8 mm; pistillate 10–11 mm.
Corollas

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

staminate 3–5 mm; pistillate 8–10 mm.
Phyllaries

distally bright white to light yellow.

distally dingy brown (apices acute-acuminate).
Heads

6–13 in corymbiform arrays.

borne singly.
Cypselae

0.7–1.2 mm, glabrous or sparingly papillate;

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

2–3.5 mm, pubescent;

pappi: staminate 4.5–6 mm; pistillate 10–12 mm.
2n

= 28.

= 28, 56.

Antennaria microphylla

Antennaria dimorpha
Phenology Flowering early–mid summer. Flowering early–mid spring.
Habitat Moist open areas, flood plains of streams, margins of alkaline depressions, lower montane to subalpine (subarctic) Sagebrush steppe, plains, foothills of mountains
Elevation 0–3200 m (0–10500 ft) 600–3400 m (2000–11200 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; NE; NM; NV; OR; UT; WA; WY; AB; BC; SK
[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 dimorpha is characterized by narrowly oblanceolate leaves and relatively large heads (borne singly). It is, perhaps, the most xerophytic of spring-blooming Antennaria species. It belongs to the Dimorphae group.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 407. FNA vol. 19, p. 398.
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. corymbosa, A. densifolia, 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 Gnaphalium dimorphum, A. dimorpha var. integra, A. dimorpha var. macrocephala, A. dimorpha var. nuttallii, A. latisquama, A. macrocephala
Name authority Rydberg: Bull. Torrey Bot. Club 24: 303. (1897) (Nuttall) Torrey & A. Gray: Fl. N. Amer. 2: 431. (1843)
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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