Pseudognaphalium micradenium

(Weatherby) G. L. Nesom

Sida 19: 618. 2001.

Common names: Delicate rabbit-tobacco
Endemic
Basionym: Gnaphalium obtusifolium var. micradenium Weatherby Rhodora 25: 22. 1923
Synonyms: Gnaphalium helleri var. micradenium (Weatherby) Mahler Pseudognaphalium helleri subsp. micradenium (Weatherby) Kartesz
Treatment appears in FNA Volume 19. Treatment on page 421. Mentioned on page 415, 416.

Annuals (fragrant), 15–60 cm; taprooted or fibrous-rooted. Stems glandular-puberulent (without persistent tomentum), stipitate glands 0.1–0.2 mm, stalks narrower than gland widths. Leaf blades linear to linear-lanceolate or linear-oblanceolate, 1.5–5.5 cm × 1.5–10 mm, bases not clasping, not decurrent, margins flat, faces bicolor, abaxial white to gray, tomentose, adaxial green, both minutely stipitate-glandular. Heads in corymbiform arrays. Involucres turbinate-campanulate, 5–6 mm. Phyllaries in 4–6 series, white to tawny white (hyaline, shiny), narrowly ovate to oblong, glabrous. Pistillate florets 47–78. Bisexual florets (7–)11–20. Cypselae ridged, smooth.


Phenology: Flowering Sep–Oct.
Habitat: Dry woods and openings, roadsides
Elevation: 10–600 m

Distribution

V19-689-distribution-map.gif

Ga., Ind., Ky., Maine, Md., Mass., Mich., Minn., Mo., N.H., N.J., N.Y., N.C., Pa., S.C., Tenn., Va., Wis.

Discussion

Pseudognaphalium micradenium has a more northern and Appalachian distribution than P. helleri. A report of P. micradenium for Louisiana probably was based on specimens of P. helleri. The two species differ in vestiture and other features; stems of P. micradenium are more slender than those of its close relatives.

Selected References

None.

Lower Taxa

None.
Guy L. Nesom +
(Weatherby) G. L. Nesom +
Gnaphalium obtusifolium var. micradenium +
Delicate rabbit-tobacco +
Ga. +, Ind. +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, N.H. +, N.J. +, N.Y. +, N.C. +, Pa. +, S.C. +, Tenn. +, Va. +  and Wis. +
10–600 m +
Dry woods and openings, roadsides +
Flowering Sep–Oct. +
Gnaphalium helleri var. micradenium +  and Pseudognaphalium helleri subsp. micradenium +
Pseudognaphalium micradenium +
Pseudognaphalium +
species +