Pyrrocoma liatriformis

Greene

Leafl. Bot. Observ. Crit. 2: 17. 1909.

Common names: Palouse goldenweed
EndemicConservation concern
Synonyms: Haplopappus integrifolius subsp. liatriformis (Greene) H. M. Hall Haplopappus integrifolius subsp. scaberulus (Greene) H. M. Hall Haplopappus liatriformis (Nuttall) Torrey Haplopappus racemosus subsp. liatriformis (Greene) D. D. Keck
Treatment appears in FNA Volume 20. Treatment on page 420. Mentioned on page 414.

Plants 25–70 cm. Stems 1–3, erect, sometimes curved-ascending, sparsely villous to tomentose, eglandular. Leaves: 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. Heads 4–12 in open, racemiform arrays. Peduncles 0–3 cm. Involucres campanulate, 10–23 × 12–20 mm (in axils of leafy bract). Phyllaries in 4–5 series, green, lanceolate, 5–12 mm, unequal, margins entire, ciliate, apices acute, faces villous. Ray florets 17–25; corollas 6–14.5 mm. Disc florets 35–60; corollas 7–11 mm. Cypselae narrowly oblong, 4.5–6.5 mm, 4-angled, faces striate, villous; pappi tawny, 5.8–8 mm. 2n = 36.


Phenology: Flowering Jul–Aug.
Habitat: Prairies, roadsides
Elevation: 700–1100 m

Discussion

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.

Selected References

None.

Lower Taxa

None.
... more about "Pyrrocoma liatriformis"
David J. Bogler +
Greene +
Palouse goldenweed +
Idaho +  and Wash. +
700–1100 m +
Prairies, roadsides +
Flowering Jul–Aug. +
Leafl. Bot. Observ. Crit. +
Endemic +  and Conservation concern +
Haplopappus integrifolius subsp. liatriformis +, Haplopappus integrifolius subsp. scaberulus +, Haplopappus liatriformis +  and Haplopappus racemosus subsp. liatriformis +
Pyrrocoma liatriformis +
Pyrrocoma +
species +