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Heller's Cudweed

Pseudognaphalium micradenium (Weatherby) Nesom

Comments

provided by eFloras
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.
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copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 19: 415, 416, 421 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Flora of North America Editorial Committee
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eFloras.org
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Description

provided by eFloras
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.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 19: 415, 416, 421 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Synonym

provided by eFloras
Gnaphalium obtusifolium Linnaeus var. micradenium Weatherby, Rhodora 25: 22. 1923; G. helleri Britton var. micradenium (Weatherby) Mahler; Pseudognaphalium helleri (Britton) Anderberg subsp. micradenium (Weatherby) Kartesz
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 19: 415, 416, 421 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras