Tonestus pygmaeus
Tonestus eximius
pygmy goldenweed, pygmy serpentweed
Lake Tahoe serpentweed, Tahoe tonestus
densely hairy, sometimes also stipitate-glandular.
(clothed with marcescent leaf bases) glabrous, densely stipitate-glandular.
basal blades linear to spatulate, 10–50(–95) × 1.5–6 mm;
cauline blades oblong to broadly lanceolate, 15–34 × 3–7 mm, gradually reduced distally; 3–5-nerved, margins entire, ciliate, sometimes stipitate-glandular, faces eglandular or sparsely stipitate-glandular.
basal blades broadly spatulate, 20–35 × 12–15 mm, margins coarsely, irregularly serrate to dentate;
cauline blades oblong, 9–52 × 5–15 mm, ± reduced distally, margins coarsely, irregularly serrate or nearly entire; 1- or 3-nerved, margins stipitate-glandular, faces glabrous, stipitate-glandular.
3–8 mm.
2–15 mm.
broadly campanulate, 8–20 × 7–12 mm.
broadly campanulate, 9–16(–20) × 5–11(–15) mm.
10–16(–35);
laminae elliptic, 6.5–8.5 × 1.5–3.5 mm.
10–13;
laminae elliptic, 5–8 × 1–3 mm.
43–66;
corollas narrowly funnelform, 4.5–7.5 mm, lobes erect to spreading, 0.8–1.2 mm, lengths ca. 1/7 corollas;
anthers 2.2–2.8 mm;
style-branch appendages lanceolate, 0.8–1.1 × 0.3 mm wide, stigmatic lines 0.6–1 mm.
41–49;
corollas narrowly funnelform, 5.5–7.5(–8.2) mm, exceeding involucres, lobes erect, 0.7–1.7 mm, 1/10–1/5 corolla length;
anthers 2.5–3.3 mm;
style-branch appendages subulate, 0.9–1.3 mm, stigmatic lines 0.9–1.6 mm.
16–34, in 3–4 (–5) series, 1- or weakly 3–5-nerved, ± equal, margins ciliolate at least distally;
outer and mid green, ovate to oblong, 4.5–10.5 × 1.5–5.5 mm, foliaceous, apices rounded to obtuse, faces sparsely stipitate-glandular distally;
inner green or usually anthocyanic, linear to narrowly oblong, 5–9 × 0.9–4 mm, chartaceous proximally, margins scarious, often fimbriate, sometimes stipitate-glandular, apices acute to acuminate, sometimes reflexed, faces sparsely stipitate-glandular distally.
16–32 in 3–4 series, 1- or weakly 3-nerved, ± equal, margins eciliate;
outer and mid green, oblong, 6–10 × 2–5 mm, foliaceous, apices rounded or obtuse to acute;
inner green or sometimes anthocyanic, linear, 7–9 × 0.5–2 mm, chartaceous proximally, margins scarious, fimbriate and/or stipitate-glandular distally, apices acute to acuminate, often reflexed, faces stipitate-glandular distally.
1(–2).
usually borne singly, sometimes 2–4.
cylindric, 2–5 mm, 8–9-nerved, faces villous;
pappus bristles ± 34–51, flexible.
linear, 2.5–6 mm, 5–9-nerved, faces villous, often ± viscid;
pappus bristles 19–43, brittle.
= 18.
= 18.
Tonestus pygmaeus
Tonestus eximius
Tonestus pygmaeus is uncommon in Wyoming, known only from the Snowy Range of the Medicine Bow Mountains. Attribution of this species to Montana is based on historic collections.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Tonestus eximius is known only from the upper elevations of the Sierra Nevada in the vicinity of Lake Tahoe in Alpine and El Dorado counties, California, and Washoe County, Nevada. It is similar to Lorandersonia peirsonii, although smaller in most respects.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
PNW Herbaria
SW CO Wildflowers
WildflowerSearch
iNaturalist
USDA Plants Database
CA
