Pseudognaphalium helleri
Pseudognaphalium austrotexanum
Heller's cudweed, Heller's rabbit-tobacco
South Texas rabbit-tobacco, Texas rabbit-tobacco
greenish, glandular-villous (without persistent tomentum, stipitate glands mostly 0.3–1 mm, often variable, stalks broadened toward bases, about equaling gland widths).
densely and closely white-tomentose-floccose, glabrescent, not glandular.
blades mostly oblong-lanceolate, 2.5–7 cm × 4–20 mm, bases not clasping, not decurrent, margins flat, faces bicolor, abaxial white to gray with lightly persistent tomentum, adaxial green, both minutely stipitate-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.
campanulate, 6–7 mm.
broadly campanulate, 4.5–5 mm.
83–107.
[46–]76–102.
9–15.
(6–)8–11.
in 4–6 series, white (opaque, shiny), ovate to ovate-oblong or oblong, ± tomentose.
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.
in corymbiform arrays.
in corymbiform arrays.
ridged, smooth.
ridged, papillate-roughened.
Pseudognaphalium helleri
Pseudognaphalium austrotexanum
Pseudognaphalium helleri and P. micradenium are similar to P. obtusifolium in most features; both differ in their glandular stems without the persistent whitish tomentum of P. obtusifolium.
(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.)
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