Antennaria parvifolia |
Antennaria media |
|
---|---|---|
little-leaf pussytoes, Nuttall's pussytoes, small-leaf pussytoes |
alpine pussytoes, dark pussytoes, Rocky Mountain pussytoes |
|
Habit | Dioecious or gynoecious (staminate plants uncommon or in equal frequency as pistillates, respectively). | Dioecious or gynoecious (staminate plants rare or in equal frequency to pistillates, respectively). |
Plants | 2–8(–15) cm. |
5–13 cm. |
Stolons | 1–6 cm. |
1–4 cm. |
Basal leaves | 1-nerved, narrowly spatulate to spatulate or oblanceolate, 8–35 × 2–15 mm, tips mucronate, faces gray-tomentose. |
1-nerved, spatulate to oblanceolate, 6–19 × 2.5–6 mm, tips mucronate, faces gray-pubescent. |
Cauline leaves | linear to narrowly oblanceolate, 8–20 mm, not flagged (apices acute). |
linear, 5–20 mm, not flagged (apices acute). |
Involucres | staminate 5.5–7.5 mm; pistillate 8–10(–15) mm (gynoecious), 7–7.2 mm (dioecious). |
staminate (3.5–)4.5–6.5 mm; pistillate 4–8 mm. |
Corollas | staminate 3.5–4.5 mm; pistillate 5–8 mm. |
staminate 2.5–4.5 mm; pistillate 3–4.5 mm. |
Phyllaries | distally white, pink, green, red, or brown. |
distally dark brown, black, or olivaceous. |
Heads | 2–7 in corymbiform arrays. |
2–5(–9) in corymbiform arrays. |
Cypselae | 1–1.8 mm, glabrous or minutely papillate; pappi: staminate 4–5.5 mm; pistillate 6.5–9 mm. |
0.6–1.6 mm, glabrous or papillate; pappi: staminate 2.5–4.5 mm; pistillate 4–5.5 mm. |
2n | = 56, 84, 112, 140. |
= 56, 98, 112. |
Antennaria parvifolia |
Antennaria media |
|
Phenology | Flowering late spring–summer. | Flowering summer. |
Habitat | Prairies, pastures, roadsides, mountain parks, open deciduous woods, and drier coniferous forests, usually ponderosa or lodgepole pine | Dry, rocky to moist alpine tundra |
Elevation | 100–3400 m (300–11200 ft) | 1500–3800 m (4900–12500 ft) |
Distribution |
AZ; CO; IA; ID; MI; MN; MT; ND; NE; NM; NV; OR; SD; TX; UT; WA; WY; AB; BC; MB; ON; SK; Okla (expected in panhandle); Wis (expected); Mexico (Chihuahua, Nuevo León)
|
AK; AZ; CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC; NT; YT
|
Discussion | Antennaria parvifolia is a widespread, polyploid complex of sexual (dioecious) and asexual (gynoecious) populations (G. L. Stebbins 1932b; R. J. Bayer and Stebbins 1987). Although variable morphologically, no infraspecific taxa seem warranted at this time. Sexual (dioecious) populations are known primarily from New Mexico and Colorado; apomictic plants occur throughout the range of the species. Probable sexual diploid/tetraploid progenitors of the A. parvifolia complex include A. dioica, A. marginata, A. neglecta, and A. pulchella/A. media. Antennaria parvifolia is characterized by relatively short stature and relatively small numbers of relatively large heads. The epithet parvifolia has been rendered as “parviflora” in floras, e.g., key in Great Plains Flora Association (1986); E. H. Moss (1959); H. J. Scoggan (1978–1979, part 4). In some floras, A. parvifolia has been confused with A. microphylla; the two are probably not closely related. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 19, p. 406. | FNA vol. 19, p. 411. |
Parent taxa | Asteraceae > tribe Gnaphalieae > Antennaria | Asteraceae > tribe Gnaphalieae > Antennaria |
Sibling taxa | ||
Synonyms | A. aprica, A. aprica var. aureola, A. aprica var. minuscula, A. aureola, A. dioica var. parvifolia, A. holmii, A. latisquamea, A. minuscula, A. recurva, A. rhodantha | A. alpina var. media, A. austromontana, A. candida, A. densa, A. modesta, A. mucronata |
Name authority | Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 406. (1841) | Greene: Pittonia 3: 286. (1898) |
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