Pseudognaphalium leucocephalum
Pseudognaphalium jaliscense
white cudweed, white rabbit-tobacco
Jalisco rabbit-tobacco
densely and persistently white-tomentose, usually with stipitate-glandular hairs protruding through tomentum.
(branched among heads) densely and persistently loosely woolly-tomentose-sericeous, not glandular.
blades (crowded, internodes mostly 1–3, sometimes to 10 mm) linear-lanceolate, 3–7 cm × 1–5(–6) mm, bases subclasping, not decurrent, margins strongly revolute, faces bicolor, abaxial densely white-tomentose, adaxial green, densely stipitate-glandular.
blades narrowly lanceolate to nearly linear, 3–10 cm × 3–6 mm, bases not clasping, decurrent 4–8 mm, margins flat or slightly revolute, faces concolor, tomentose-sericeous (bases of hairs enlarged), sessile-glandular beneath tomentum.
broadly campanulate, 5–6 mm.
campanulate, 5–6 mm.
66–85.
(80–)115[–180].
(6–14, California)29–44.
(6–)8–12[–30].
in 5–7 series, bright white (opaque, dull), oblong to oblong-ovate, glabrous.
in 5–6(–7) series, white (opaque, dull), ovate or elliptic (keeled, apiculate), glabrous.
in corymbiform arrays.
in corymbiform arrays.
ridged, smooth.
weakly ridged, papillate-roughened or smooth.
= 28.
Pseudognaphalium leucocephalum
Pseudognaphalium jaliscense
Pseudognaphalium leucocephalum is similar to P. viscosum, which has shiny, hyaline, ovate-lanceolate phyllaries, 200–250 pistillate florets, (13–)16–29 bisexual florets, and papillate-roughened cypselae. Some plants of P. leucocephalum also appear to approach P. biolettii in general appearance, and it is possible that some of them may represent hybrids. Plants of P. biolettii differ from P. leucocephalum in their typically eglandular stems, broader, basally ampliate, clasping, more widely spaced, and less densely glandular leaves, and thinner, shiny phyllaries.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Pseudognaphalium jaliscense is recognized by its relatively long, narrow, concolor to weakly bicolor leaves with non-clasping, short-decurrent bases, relatively large heads with white, opaque, dull phyllaries, and relatively large numbers of pistillate and bisexual florets. Counts of pistillate and bisexual florets from the United States collections are mostly 90–115 and (6–)8–12 (fewer than in Mexico).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
WildflowerSearch
iNaturalist
USDA Plants Database
