Difference between revisions of "Antennaria howellii subsp. neodioica"

Latest revision as of 19:54, 5 November 2020

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

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