Flora of North America species comparison

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Antennaria microphylla

Antennaria arcuata

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

box pussytoes, meadow pussytoes
Habit Dioecious. Dioecious.
Plants

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

5–15(–20) cm (stems woolly).
Stolons

1–5 cm.

4–10 cm (arched).
Basal leaves

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

1–3-nerved, narrowly to broadly spatulate, or narrowly rhombic-obovate, 20–45 × 3–15 mm, tips mucronate, faces densely white-woolly.
Cauline leaves

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

linear, (2–)5–40 mm, not flagged.
Involucres

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

staminate 3–5 mm; pistillate 4.5–6(–7) mm.
Corollas

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

staminate 2.5–4 mm; pistillate 3.5–5 mm.
Phyllaries

distally bright white to light yellow.

distally whitish (mostly staminate) or grayish stramineous to light brown.
Heads

6–13 in corymbiform arrays.

(4–)7–25, in racemiform to paniculiform or corymbiform arrays.
Cypselae

0.7–1.2 mm, glabrous or sparingly papillate;

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

1–1.8 mm, glabrous;

pappi: staminate 3–4.5 mm; pistillate 4–6 mm.
2n

= 28.

= 28.

Antennaria microphylla

Antennaria arcuata
Phenology Flowering early–mid summer. Flowering summer.
Habitat Moist open areas, flood plains of streams, margins of alkaline depressions, lower montane to subalpine (subarctic) Moist alkaline basins in sagebrush steppe
Elevation 0–3200 m (0–10500 ft) 1500–2300 m (4900–7500 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
ID; NV; 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 arcuata is known from three widely disjunct areas in Blaine County, Idaho; Elko County, Nevada; and Fremont County, Wyoming (R. J. Bayer 1992). It is characterized by arching stolons and white-woolly indument (Bayer) and is not easily confused with other species of Antennaria.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 407. FNA vol. 19, p. 396.
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. 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. 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
Name authority Rydberg: Bull. Torrey Bot. Club 24: 303. (1897) Cronquist: Leafl. W. Bot. 6: 41. (1950)
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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