Pyrrocoma liatriformis
Pyrrocoma carthamoides
Palouse goldenweed, smallhead goldenweed
Columbian goldenweed, large-flower goldenweed, white-vein wintergreen, woolly-heads
1–3, erect, sometimes curved-ascending, sparsely villous to tomentose, eglandular.
1–4, erect or ascending to decumbent, reddish, leafy, villous.
basal blades lanceolate to oblanceolate, 80–310 × 9–30 mm, margins entire or undulate, ciliate;
cauline sessile, blades lanceolate, 30–120 × 5–20 mm;
faces sparsely tomentose, eglandular.
basal (in rosettes) petiolate, blades lanceolate to oblanceolate or spatulate, 50–200 × 5–40 mm, margins usually spinulose-serrate, sometimes entire, ciliate, apices acute, faces puberulent;
cauline sessile, blades linear-lanceolate, 40–100 × 5–15 mm, reduced distally, faces glabrous or villous-hispid, eglandular.
0–3 cm.
1–5 cm.
campanulate, 10–23 × 12–20 mm (in axils of leafy bract).
turbinate to campanulate, 10–20 × 15–35 mm.
17–25;
corollas 6–14.5 mm.
0 or 1–30;
corollas yellow, 2–7 mm (not surpassing involucres).
35–60;
corollas 7–11 mm.
25–50;
corollas 9–14 mm.
in 4–5 series, green, lanceolate, 5–12 mm, unequal, margins entire, ciliate, apices acute, faces villous.
in 3–5 series (± loose), linear-lanceolate to oblong, 10–20 mm, unequal, bases tapering, margins spinulose-serrate, ciliate, apices occasionally recurved, acute, mucronate, faces puberulent.
4–12 in open, racemiform arrays.
usually borne singly, terminal, sometimes 2–3 in racemiform arrays, subtended by leaflike bracts.
narrowly oblong, 4.5–6.5 mm, 4-angled, faces striate, villous;
pappi tawny, 5.8–8 mm.
subcylindric, 3–5.5 mm, 4-angled, faces striate or smooth, glabrous;
pappi tawny, 6–9 mm.
= 36.
Pyrrocoma liatriformis
Pyrrocoma carthamoides
Of conservation concern.
Pyrrocoma liatriformis is one of the dominants of virgin Palouse prairies and appears to be threatened. It is recognized by its hirsute stems, leaves, and phyllaries, and the small, pedunculate heads.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Varieties 3 (3 in the flora).
Pyrrocoma carthamoides is recognized by its erect, leafy, and villous stems, hispidulous leaves and phyllaries, and large, usually single heads with somewhat loose phyllaries. The ray florets are usually reduced but sometimes are lacking altogether.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Phyllary apices broad, truncate, abruptly muc-ronate, mucro usually recurved | var. subsquarrosa |
1. Phyllary apices acute to acuminate, mucro erect | → 2 |
2. Involucres hemispheric, 20–35 mm wide; phyllaries ± overlapping, broadly oblong to obovate | var. carthamoides |
2. Involucres campanulate or turbinate, 15–20 mm wide; phyllaries loose, scarcely overlap-ping, lanceolate | var. cusickii |
WA
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
BC
OR
CalFlora
