Antennaria howellii subsp. howellii

unknown
Synonyms: Antennaria callilepis Greene Antennaria exima Greene
Treatment appears in FNA Volume 19. Treatment on page 404. Mentioned on page 390, 405.
Plants 15–30 cm. Stolons 1–4 cm. Basal leaves 1–3-nerved, spatulate to oblanceolate, 25–40 × 9–12 mm, tips mucronate, faces abaxially tomentose, adaxially green-glabrous. Cauline leaves linear, 20–40 mm, not flagged. Heads 5–12 in corymbiform arrays. Involucres: staminate unknown; pistillate 6–7.5 mm. Phyllaries distally light brown or white. Corollas: pistillate 5–6 mm. Cypselae 1.5–2 mm, notably papillate; pappi: pistillate 6–8 mm. 2n = 56, 84, 140 (under A. neodioica).

Phenology: Flowering mid spring–early summer.
Habitat: Pastures, dry fields, openings in deciduous woodlands and coniferous forests. and rock barrens
Elevation: 0–2200 m

Distribution

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Alta., B.C., Ont., Sask., Yukon, Calif., Colo., Idaho, Minn., Mont., Oreg., S.Dak., Utah, Wash., Wis., Wyo.

Discussion

Subspecies howellii is most common in the western half of the range of Antennaria howellii. Based on morphology, this group of apomicts is closely related to A. racemosa of the northern Rockies (R. J. Bayer 1985) and, perhaps, to A. marginata of the southern Rockies.

References

None.

Lower Taxa

No lower taxa listed.