Pseudognaphalium luteoalbum

(Linnaeus) Hilliard & B. L. Burtt

Bot. J. Linn. Soc. 82: 206. 1981.

Common names: Red-tip rabbit-tobacco
IntroducedIllustrated
Basionym: Gnaphalium luteoalbum Linnaeus Sp. Pl. 2: 851. 1753
Treatment appears in FNA Volume 19. Treatment on page 418. Mentioned on page 387, 415, 416, 429.

Annuals, 15–40 cm; taprooted or fibrous-rooted. Stems loosely white-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. Heads in terminal glomerules (1–2 cm diam.). Involucres broadly campanulate, 3–4 mm. Phyllaries in 3–4 series, silvery gray to yellowish (hyaline), ovate to ovate-oblong, glabrous. Pistillate florets 135–160. Bisexual florets 5–10 (corollas red-tipped). Cypselae 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.


Phenology: Flowering Apr–Oct.
Habitat: Roadsides, fields and pastures, ditches, streambanks, seasonal ponds, gardens, and other disturbed sites
Elevation: 5–2000 m

Distribution

V19-680-distribution-map.gif

Introduced; Ariz., Ark., Calif., Fla., La., Nev., N.Mex., N.Y., Oreg., Tex., Utah, Wash., Mexico, Europe, Asia, Africa, Pacific Islands (New Zealand), Australia

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.

Selected References

None.

Lower Taxa

None.
28 +, 16 +  and 14 +
white +  and gray +
grayish;greenish +
glabrescent +  and gray-tomentose +
scarious +
mostly ovate +  and lanceovate or linear +
paniculiform +  and corymbiform +
indeterminate +  and determinate +
Guy L. Nesom +
(Linnaeus) Hilliard & B. L. Burtt +
subclasping +
decurrent +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Gnaphalium luteoalbum +
compound +  and simple +
mostly narrowly lanceolate;oblanceolate +
5-ribbed +, 3-ribbed +  and 2-ribbed +
muriculate +, papillate +  and smooth +
Red-tip rabbit-tobacco +
actinomorphic +
Ariz. +, Ark. +, Calif. +, Fla. +, La. +, Nev. +, N.Mex. +, N.Y. +, Oreg. +, Tex. +, Utah +, Wash. +, Mexico +, Europe +, Asia +, Africa +, Pacific Islands (New Zealand) +  and Australia +
5–2000 m +
mostly concolor;weakly bicolor +
papillate-roughened +
winged +  and beaked +
dispersed +
Roadsides, fields and pastures, ditches, streambanks, seasonal ponds, gardens, and other disturbed sites +
singly +  and aggregated +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
campanulate +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
cauline +  and basal +
rarely lanceovate +  and lanceolate +
2-carpellate +
persistent +
Flowering Apr–Oct. +
Bot. J. Linn. Soc. +
bearing subulate enations +, hairy +  and bristly +
conic;more or less columnar +
4 +  and 6 +
exalbuminous +
Introduced +  and Illustrated +
decumbent +  and procumbent +
appendaged +  and truncate +
papillate +
Compositae +
Pseudognaphalium luteoalbum +
Pseudognaphalium +
species +
fibrous-rooted +  and taprooted +
150 cm1,500 mm <br />1.5 m <br /> (200 cm2,000 mm <br />2 m <br />) +
15 cm150 mm <br />0.15 m <br /> (40 cm400 mm <br />0.4 m <br />) +
shrub +  and subshrub +