Antennaria howellii subsp. neodioica

(Greene) R. J. Bayer

Brittonia 41: 397. 1989

Common names: Antennaire néodioïque
Endemic
Basionyms: Antennaria neodioica Greene Pittonia 3: 184. 1897
Synonyms: Antennaria alsinoides Greene Antennaria grandis (Fernald) House Antennaria neglecta var. attenuata (Fernald) Cronquist Antennaria neglecta var. neodioica (Greene) Cronquist Antennaria neodioica var. attenuata Fernald Antennaria neodioica var. chlorophylla Fernald Antennaria neodioica var. grandis Fernald Antennaria neodioica var. interjecta Fernald Antennaria neodioica var. rupicola (Fernald) Fernald Antennaria obovata Antennaria rupicola
Treatment appears in FNA Volume 19. Treatment on page 405. Mentioned on page 403, 404.

Plants (6–)15–35 cm. Stolons 3–8(–12) cm (leaves along stolons almost equal to those of rosettes at ends). Basal leaves 1-nerved (sometimes obscurely 3-nerved), spatulate to narrowly or broadly obovate (petiolate), 14–48 × 2.5–20 mm, tips mucronate, faces abaxially tomentose, adaxially gray-pubescent to floccose-glabrescent. Cauline leaves linear, 8–35 mm, distal flagged. Heads 4–8(–13) in corymbiform arrays. Involucres: staminate (very uncommon) 6 mm; pistillate 6–9 mm. Phyllaries distally white or cream Corollas: staminate 3.5 mm; pistillate 3.5–6 mm. Cypselae 0.9–1.5 mm, minutely papillate; pappi: staminate 4 mm; pistillate 5.5–7 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 and dry lake shores
Elevation: 0–2200 m

Distribution

V19-651-distribution-map.gif

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

Discussion

Subspecies neodioica is most common in the eastern half of the range of Antennaria howellii; it is also found sporadically as far west as Washington and British Columbia. Antennaria virginica is likely the primary sexual progenitor of apomicts in subsp. neodioica (R. J. Bayer 1985).

Selected References

None.

Lower Taxa

None.

Randall J. Bayer +
(Greene) R. J. Bayer +
Antennaria neodioica +
Antennaire néodioïque +
St. Pierre and Miquelon +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.W.T. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Colo. +, Conn. +, Del. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mont. +, Nebr. +, N.H. +, N.J. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Oreg. +, Pa. +, R.I. +, S.Dak. +, Tenn. +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +  and Wyo. +
0–2200 m +
Pastures, dry fields, openings in woodlands and forests, and rock barrens and dry lake shores +
Flowering mid spring–early summer. +
Antennaria alsinoides +, Antennaria grandis +, Antennaria neglecta var. attenuata +, Antennaria neglecta var. neodioica +, Antennaria neodioica var. attenuata +, Antennaria neodioica var. chlorophylla +, Antennaria neodioica var. grandis +, Antennaria neodioica var. interjecta +, Antennaria neodioica var. rupicola +, Antennaria obovata +  and Antennaria rupicola +
Antennaria howellii subsp. neodioica +
Antennaria howellii +
subspecies +