Flora of North America species comparison

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Pseudognaphalium luteoalbum

Pseudognaphalium austrotexanum

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

South Texas rabbit-tobacco, Texas rabbit-tobacco
Habit Annuals, 15–40 cm; taprooted or fibrous-rooted. Annuals, 30–70 cm; taprooted.
Stems

loosely white-tomentose, not glandular.

densely and closely white-tomentose-floccose, glabrescent, 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 (crowded, internodes mostly 1–3, sometimes to 10 mm) linear to linear-lanceolate, 2–5 cm × 1–3 mm, bases subclasping, not decurrent, margins strongly revolute, sometimes closely sinuate, faces bicolor, abaxial densely and closely white-tomentose, adaxial green, densely stipitate-glandular, otherwise glabrate.
Involucres

broadly campanulate, 3–4 mm.

broadly campanulate, 4.5–5 mm.
Pistillate florets

135–160.

[46–]76–102.
Bisexual florets

5–10 (corollas red-tipped).

(6–)8–11.
Phyllaries

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

in 5–7 series, silvery white (hyaline, shiny), narrowly ovate to oblong or elliptic (apices of inner thickened and slightly raised along midribs, apiculate), glabrous.
Heads

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

in corymbiform arrays.
Cypselae

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

ridged, papillate-roughened.
2n

= 14, 16, 28.

Pseudognaphalium luteoalbum

Pseudognaphalium austrotexanum
Phenology Flowering Apr–Oct. Flowering Oct–Dec(–Jan).
Habitat Roadsides, fields and pastures, ditches, streambanks, seasonal ponds, gardens, and other disturbed sites Sandy soil in pastures, grasslands, open disturbed sites
Elevation 5–2000 m (0–6600 ft) 0–10[–600] m (0–0[–2000] 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
TX; Mexico (Nuevo León)
[BONAP county 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 austrotexanum is similar to P. viscosum in general appearance: taprooted annuals with stems white-tomentose, strictly erect, and mostly unbranched proximal to heads, leaves linear to linear-lanceolate, strongly bicolor (green and glandular adaxially, white-tomentose abaxially), loosely to strictly ascending, crowded on relatively short internodes and continuing to immediately proximal to the heads, and basally subclasping but not strongly auriculate, phyllaries silvery white, thin, and hyaline, and cypselae minutely papillate-roughened.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 418. FNA vol. 19, p. 422.
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. beneolens, 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
Name authority (Linnaeus) Hilliard & B. L. Burtt: Bot. J. Linn. Soc. 82: 206. (1981) G. L. Nesom: Sida 19: 507, fig. 1. (2001)
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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