Flora of North America species comparison

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Pseudognaphalium macounii

Pseudognaphalium luteoalbum

gnaphale de Macoun, Macoun's cudweed, Macoun's everlasting, Macoun's rabbit-tobacco, sticky cudweed, winded cudweed, wing cudweed

Jersey cudweed, Jersey rabbit tobacco, red-tip rabbit-tobacco, weedy cudweed
Habit Annuals or biennials (often sweetly fragrant), 40–90 cm; taprooted. Annuals, 15–40 cm; taprooted or fibrous-rooted.
Stems

stipitate-glandular throughout (usually persistently lightly white-tomentose distally).

loosely white-tomentose, not glandular.
Leaf

blades (not crowded, internodes mostly 5+ mm) lanceolate to oblanceolate, 3–10 cm × 3–13 mm (distal linear), bases not clasping, decurrent 5–10 mm, margins flat to slightly revolute, faces weakly bicolor, abaxial tomentose, adaxial stipitate-glandular, otherwise glabrescent or glabrous.

blades (crowded, internodes 1–5, sometimes to 10 mm) narrowly obovate to subspatulate, 1–3(–6) cm × 2–8 mm (distal smaller, oblanceolate to narrowly oblong or linear), bases subclasping, usually decurrent 1–2 mm, margins weakly revolute, faces mostly concolor to weakly bicolor, abaxial gray-tomentose, adaxial usually gray-tomentose, sometimes glabrescent, neither glandular.
Involucres

campanulo-subglobose, 4.5–5.5 mm.

broadly campanulate, 3–4 mm.
Pistillate florets

47–101(–156).

135–160.
Bisexual florets

5–12[–21].

5–10 (corollas red-tipped).
Phyllaries

in 4–5 series, stramineous to creamy (hyaline, shiny), ovate to ovate-oblong, glabrous.

in 3–4 series, silvery gray to yellowish (hyaline), ovate to ovate-oblong, glabrous.
Heads

in corymbiform arrays.

in terminal glomerules (1–2 cm diam.).
Cypselae

not ridged, ± papillate-roughened.

not evidently ridged (conspicuously dotted with whitish, papilliform hairs; pappus bristles loosely coherent basally, released in clusters or easily fragmented rings).
2n

= 14, 16, 28.

Pseudognaphalium macounii

Pseudognaphalium luteoalbum
Phenology Flowering July–Oct. Flowering Apr–Oct.
Habitat Dry, open habitats, pastures, open woods or edges, roadsides Roadsides, fields and pastures, ditches, streambanks, seasonal ponds, gardens, and other disturbed sites
Elevation 50–2600(–3000) m (200–8500(–9800) ft) 5–2000 m (0–6600 ft)
Distribution
from FNA
AZ; CA; CO; CT; ID; IL; IN; MA; ME; MI; MN; MT; NH; NM; NY; OH; OR; PA; SD; TN; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NS; ON; PE; QC; SK; Mexico
[WildflowerSearch map]
[BONAP county map]
from FNA
AR; AZ; CA; FL; LA; NM; NV; NY; OR; TX; UT; WA; Mexico; Europe; Asia; Africa; Pacific Islands (New Zealand); Australia [Introduced in North America]
[WildflowerSearch map]
Discussion

Pseudognaphalium macounii is recognized by its stipitate-glandular, proximally glabrescent stems, bicolor and decurrent leaves, relatively large and many-flowered heads, and hyaline, shiny phyllaries. Reports of P. macounii from Texas are based on specimens of P. viscosum.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Pseudognaphalium luteoalbum is native to Eurasia. It is similar in overall habit to P. stramineum but distinctive in its larger heads and red-tipped corollas (visible through the translucent phyllaries). Cypselae of P. luteoalbum have papilliform hairs; cypselae of other North American species of Pseudognaphalium are glabrous.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 421. FNA vol. 19, p. 418.
Parent taxa Asteraceae > tribe Gnaphalieae > Pseudognaphalium Asteraceae > tribe Gnaphalieae > Pseudognaphalium
Sibling taxa
P. arizonicum, P. austrotexanum, P. beneolens, P. biolettii, P. californicum, P. canescens, P. helleri, P. jaliscense, P. leucocephalum, P. luteoalbum, P. micradenium, P. microcephalum, P. obtusifolium, P. pringlei, P. ramosissimum, P. roseum, P. saxicola, P. stramineum, P. thermale, P. viscosum
P. arizonicum, P. austrotexanum, P. beneolens, P. biolettii, P. californicum, P. canescens, P. helleri, P. jaliscense, P. leucocephalum, P. macounii, P. micradenium, P. microcephalum, P. obtusifolium, P. pringlei, P. ramosissimum, P. roseum, P. saxicola, P. stramineum, P. thermale, P. viscosum
Synonyms Gnaphalium macounii, Gnaphalium decurrens Gnaphalium luteoalbum
Name authority (Greene) Kartesz: in J. T. Kartesz and C. A. Meacham, Synth. N. Amer. Fl., nomencl. innov. 30. (1999) (Linnaeus) Hilliard & B. L. Burtt: Bot. J. Linn. Soc. 82: 206. (1981)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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