Antennaria aromatica

Evert

Madroño 31: 109, fig. 1. 1984

Common names: Scented or aromatic pussytoes
Treatment appears in FNA Volume 19. Treatment on page 408. Mentioned on page 390, 394, 409, 410, 411, 415.
Dioecious. Plants 2–7 cm (stems stipitate-glandular). Stolons 0.5–2.5 cm. Basal leaves 1-nerved, usually cuneate-spatulate, sometimes oblanceolate, 5–16 × 3–10 mm, tips mucronate, faces gray-pubescent (and stipitate-glandular; fresh leaves citronella scented). Cauline leaves linear, 3–14 mm, not flagged (apices acute). Heads borne singly or 2–5 in corymbiform arrays. Involucres: staminate 4.5–6.5 mm; pistillate 5–7(–9) mm. Phyllaries distally light brown, dark brown, or olivaceous. Corollas: staminate 2.5–3 mm; pistillate 3.5–4.5 mm. Cypselae 0.9–2 mm, sparingly papillate; pappi: staminate 3–4 mm; pistillate 4.5–5.5 mm. 2n = 28, 56, 84.

Phenology: Flowering mid summer.
Habitat: Subalpine limestone talus
Elevation: 1600–3000 m

Distribution

V19-661-distribution-map.gif

Alta., Idaho, Mont., Wyo.

Discussion

Known only from the northern Rockies, Antennaria aromatica is characterized by glandulosity, cuneate leaves, and odor of citronella in crushed leaves of living material. It is most closely related to A. densifolia of the Northwest Territories and Yukon (R. J. Bayer 1989c). Some collections of pistillate plants from Colorado and other areas of the Rockies superficially resemble A. aromatica and undoubtedly have A. aromatica in their parentage. They are non-glandular and odorless and are closer to the type of A. pulvinata, which is included in the circumscription of A. rosea, as A. rosea subsp. pulvinata (Bayer). Antennaria aromatica is a sexual progenitor of the A. rosea and A. alpina polyploid complexes.

References

None.

Lower Taxa

No lower taxa listed.