Flora of North America species comparison

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Pseudognaphalium luteoalbum

Pseudognaphalium beneolens

Jersey cudweed, Jersey rabbit tobacco, red-tip rabbit-tobacco, weedy cudweed

cudweed, fragrant rabbit-tobacco, Wright's cudweed
Habit Annuals, 15–40 cm; taprooted or fibrous-rooted. Annuals or short-lived perennials, 30–80(–110) cm; taprooted.
Stems

loosely white-tomentose, not glandular.

persistently tomentose, not glandular.
Leaf

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.

blades mostly linear, 3–6 cm × 1.5–3.5 mm (sometimes smaller distally), bases not clasping, decurrent 5–15 mm, margins flat, faces concolor, loosely tomentose, not glandular.
Involucres

broadly campanulate, 3–4 mm.

turbinate-campanulate, 5–6 mm.
Pistillate florets

135–160.

(39–)44–69.
Bisexual florets

5–10 (corollas red-tipped).

5–8(–11).
Phyllaries

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

in (4–)5–6(–7) series, white (opaque, dull to shiny), ovate to ovate-oblong (inner usually with filiform keel and slight apiculum), glabrous.
Heads

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

usually in loose, paniculiform arrays.
Cypselae

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

ridged, smooth or weakly papillate-roughened.
2n

= 14, 16, 28.

= 14.

Pseudognaphalium luteoalbum

Pseudognaphalium beneolens
Phenology Flowering Apr–Oct. Flowering (Apr–)Jun–Oct.
Habitat Roadsides, fields and pastures, ditches, streambanks, seasonal ponds, gardens, and other disturbed sites Dry, open slopes and ridges, streambeds, road banks and other disturbed sites, sandy flats, dunes, coastal sage scrub, chaparral, yellow pine, foothill pine, blue oak woodland
Elevation 5–2000 m (0–6600 ft) (1–)50–800(–2000) m ((0–)200–2600(–6600) ft)
Distribution
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]
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
Discussion

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.)

Pseudognaphalium beneolens differs from P. thermale in its leaves linear throughout, heads usually in elongate, paniculiform arrays, larger heads (greater numbers of phyllaries in greater numbers of series) with phyllaries more opaque and duller, and greater numbers of bisexual florets. The cauline leaves of P. beneolens tend to become curving-coiling. In areas of sympatry, habitats of P. beneolens are characteristically at lower elevations than those of P. thermale.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 418. FNA vol. 19, p. 419.
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. macounii, 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. biolettii, P. californicum, P. canescens, P. helleri, P. jaliscense, P. leucocephalum, P. luteoalbum, P. macounii, P. micradenium, P. microcephalum, P. obtusifolium, P. pringlei, P. ramosissimum, P. roseum, P. saxicola, P. stramineum, P. thermale, P. viscosum
Synonyms Gnaphalium luteoalbum Gnaphalium beneolens, Gnaphalium canescens subsp. beneolens, P. canescens subsp. beneolens
Name authority (Linnaeus) Hilliard & B. L. Burtt: Bot. J. Linn. Soc. 82: 206. (1981) (Davidson) Anderberg: Opera Bot. 104: 147. (1991)
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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