Stiff Sunflower - Helianthus pauciflorus
Other Names:
Helianthus rigidus, Helianthus laetiflorus
Native Species
Global Rank:
G5
State Rank:
S4
Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value:
4
External Links
Rhizomatous perennial. Stems erect, usually simple, 30–100 cm. Herbage scabrous to hispid-strigose. Leaves opposite at least below; blades serrate, lanceolate to ovate, 3–12 cm long. Involucres 14–23 mm across; phyllaries broadly lanceolate to ovate, glabrate, minutely ciliate, 6–10 mm long. Ray ligules 10–30 mm long. Disk corollas 4–8 mm long. Achenes 4–6 mm long
(Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Our plants are subspecies
subrhomboideus (Rydb.) O. Spring & E.E. Schill.