The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

pygmy goldenweed, pygmy serpentweed

Habit Perennials, loosely cespitose, 1–9 cm; with branched caudices surmounting well-developed taproots.
Stems

densely hairy, sometimes also stipitate-glandular.

Leaves

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.

Peduncles

3–8 mm.

Involucres

broadly campanulate, 8–20 × 7–12 mm.

Ray florets

10–16(–35);

laminae elliptic, 6.5–8.5 × 1.5–3.5 mm.

Disc florets

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.

Phyllaries

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.

Heads

1(–2).

Cypselae

cylindric, 2–5 mm, 8–9-nerved, faces villous;

pappus bristles ± 34–51, flexible.

2n

= 18.

Tonestus pygmaeus

Phenology Flowering and fruiting early–late summer.
Habitat Meadows, fellfields, talus slopes, rock crevices, dwarf coniferous forests in alpine and upper subalpine communities, on soils of usually granitic, sometimes limestone origin
Elevation 3100–4100 m (10200–13500 ft)
Distribution
from FNA
CO; MT; NM; WY
[WildflowerSearch map]
[BONAP county map]
Discussion

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.)

Source FNA vol. 20, p. 183.
Parent taxa Asteraceae > tribe Astereae > Tonestus
Sibling taxa
T. eximius, T. graniticus, T. lyallii
Synonyms Stenotus pygmaeus, Haplopappus pygmaeus
Name authority (Torrey & A. Gray) A. Nelson: Bot. Gaz. 37: 262. (1904)
Web links