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Tauscher, Joseph Allan

Pterocaulon pycnostachyum

Pterocaulon pycnostachyum (Michx.) Elliott

Blackroot, Densespike Blackroot, Fox-tail, Coastal Blackroot

Asteraceae (Aster Family)

Synonym(s): Pterocaulon undulatum

USDA Symbol: PTPY2

USDA Native Status: L48 (N)

From the Image Gallery

2 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb , Subshrub
Root Type: Tuberous
Leaf Retention: Deciduous
Leaf Arrangement: Alternate
Leaf Complexity: Simple
Leaf Shape: Lanceolate
Leaf Pubescence: Tomentose
Leaf Margin: Dentate , Denticulate
Inflorescence: Terminal
Size Notes: Up to about 32 inches tall.
Leaf: Green above, white below.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.

Bloom Information

Bloom Color: White
Bloom Time: Apr , May , Jun , Jul , Aug , Sep
Bloom Notes: Buds pinkish-white, maturing to white, then to greenish-white.

Distribution

USA: AL , FL , GA , MS , NC , SC

Growing Conditions

Water Use: Low , Medium
Light Requirement: Sun , Part Shade
Soil Moisture: Dry , Moist
Soil pH: Acidic (pH<6.8)
Drought Tolerance: High
Heat Tolerant: yes
Soil Description: Sandy, low fertility soils.

National Wetland Indicator Status

Region:	AGCP	AK	AW	CB	EMP	GP	HI	MW	NCNE	WMVE
Status:	FACU				FACU

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.

Additional resources

USDA: Find Pterocaulon pycnostachyum in USDA Plants
FNA: Find Pterocaulon pycnostachyum in the Flora of North America (if available)
Google: Search Google for Pterocaulon pycnostachyum

Metadata

Record Modified: 2023-01-13
Research By: Joseph A. Marcus

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