Asteraceae
Dense-spike blackroot
Pterocaulon pycnostachyum
- Family
- Asteraceae
- Genus
- Pterocaulon
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Common names
By language (1)
- English
- Dense-spike blackroot
Synonyms
- Chlaenobolus pycnostachyum Cass.
- Chlaenobolus undulatus Small
- Conyza pycnostachya Michx.
- Conyza spicata Lam.
- Gnaphalium undulatum Walter
- Pterocaulon billardierei F.Muell.
- Pterocaulon undulatum C.Mohr
Characteristics
- Growth habit
- Forb/herb, Subshrub
- Lifespan
- Perennial
- In the US and Canada
- Lower 48 states: native
Photos
Photo: Natthager, CC BY-SA 4.0, from Wikimedia Commons 
Photo: KATHERINE WAGNER-REISS, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons 
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons 
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons 
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons 
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons
More in Pterocaulon
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- Pterocaulon cordobenseAsteraceae
- Pterocaulon polystachyumAsteraceae
- Pterocaulon rugosumAsteraceae
- Pterocaulon serrulatumAsteraceae
- Pterocaulon redolensAsteraceae
- Pterocaulon alopecuroidesAsteraceae
- Pterocaulon angustifoliumAsteraceae
- Pterocaulon lanatumAsteraceae
- Pterocaulon lorentziiAsteraceae
Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.