Antennaria howellii subsp. petaloidea

(Fernald) R. J. Bayer

Brittonia 41: 397. 1989.

Common names: Petaloid pussytoes antennaire pétaloïde
Basionym: Antennaria neodioica var. petaloidea Fernald Proc. Boston Soc. Nat. Hist. 28: 245. 1898
Synonyms: Antennaria appendiculata Fernald Antennaria concolor Piper Antennaria neglecta var. petaloidea (Fernald) Cronquist Antennaria neglecta var. subcorymbosa Fernald Antennaria neodioica subsp. petaloidea (Fernald) R. J. Bayer & Stebbins Antennaria neodioica var. petaloidea Fernald Antennaria pedicellata Greene Antennaria petaloidea Antennaria petaloidea var. novaboracensis Fernald Antennaria petaloidea var. scariosa Fernald Antennaria petaloidea var. subcorymbosa (Fernald) Fernald Antennaria stenolepis
Treatment appears in FNA Volume 19. Treatment on page 405. Mentioned on page 404.

Plants 8–35 cm. Stolons 4–9 cm (leaves along stolons smaller than in rosettes at ends). Basal leaves 1(–3)-nerved, cuneate-oblanceolate, spatulate, or spatulate-obovate (without distinct petioles), 15–45(–65) × 5–20 mm, tips mucronate, faces abaxially tomentose, adaxially gray-pubescent to floccose-glabrescent. Cauline leaves linear, 10–35 mm, mid and distal flagged. Heads 4–10(–15) in corymbiform arrays. Involucres: staminate (uncommon) 6–6.5 mm; pistillate 7–11 mm. Phyllaries distally white or cream. Corollas: staminate 3–4 mm; pistillate 4–6.5(–8) mm. Cypselae 0.8–1.7 mm, minutely papillate; pappi: staminate 4–4.5 mm; pistillate 5.5–8 mm. 2n = 56, 84 (under A. neodioica).

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



St. Pierre and Miquelon, Alta., B.C., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Colo., Conn., Del., Ill., Ind., Maine, Md., Mass., Mich., Minn., Mont., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Oreg., Pa., R.I., S.Dak., Vt., Va., Wash., W.Va., Wis., Wyo.


Subspecies petaloidea is most common in the eastern half of the range of Antennaria howellii and is frequent as far west as British Columbia and Washington. Its primary sexual progenitors include A. plantaginifolia and A. neglecta (R. J. Bayer 1985).

Selected References


Lower Taxa

Randall J. Bayer +
(Fernald) R. J. Bayer +
Antennaria neodioica var. petaloidea +
Petaloid pussytoes +  and antennaire pétaloïde +
St. Pierre and Miquelon +, Alta. +, B.C. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Ont. +, P.E.I. +, Que. +, Colo. +, Conn. +, Del. +, Ill. +, Ind. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mont. +, N.H. +, N.J. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Oreg. +, Pa. +, R.I. +, S.Dak. +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +  and Wyo. +
0–2200 m +
Pastures, dry fields, openings in woodlands and forests, and rock barrens +
Flowering mid spring–early summer. +
Antennaria appendiculata +, Antennaria concolor +, Antennaria neglecta var. petaloidea +, Antennaria neglecta var. subcorymbosa +, Antennaria neodioica subsp. petaloidea +, Antennaria neodioica var. petaloidea +, Antennaria pedicellata +, Antennaria petaloidea +, Antennaria petaloidea var. novaboracensis +, Antennaria petaloidea var. scariosa +, Antennaria petaloidea var. subcorymbosa +  and Antennaria stenolepis +
Antennaria howellii subsp. petaloidea +
Antennaria howellii +
subspecies +