Pterocaulon pycnostachyum (Michaux) Elliott. Common name: Blackroot, Pineland Wingstem. Phenology: Apr-Jun. Habitat: Longleaf pine sandhills, pine flatwoods. Distribution: Se. NC south to s. FL and west to s. AL.
Origin/Endemic status: Endemic
Other Comments: This species can have surprisingly robust and lignified tubers in frequently burned pine savannas and dry prairies.
Synonymy ⓘ: = Fl7, FNA19, GW2, K4, POWO, RAB, SE1, WH3, Arriagada (1998), Cabrera & Ragonese (1978); = Pterocaulon undulatum (Walter) C.Mohr — S; ~ Chaenolobus undulatus (Walter) Small; Conyza pycnostachya Michaux — (basionym)
Links to other floras: = Pterocaulon pycnostachyum - FNA19
Wetland Indicator Status:
- Atlantic and Gulf Coastal Plain: FACU
Heliophily ⓘ: 8
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Horticultural Information
Intro: Erect to leaning perennial from large, black roots found in sandhills, dry pinelands and pine flatwoods.
Stems: Stems unbranched, prominently winged and covered with white or rust-colored hairs.
Leaves: Leaves alternate, sessile with leaf bases continuing down stem as wings, elliptic or lance-shaped, to 4 1/3 in. long, dark green and nearly smooth above, white and densely hairy beneath.
Inforescence:
Flowers: Composite flowers (heads) densely packed in a terminal spike (1-3 in. long), which may nod; heads less than 1/4 in. tall; consisting of tiny, white (pink-tinged), tubular disk florets and protruding styles. Tiny greenish-white bracts tightly surround the cylindric base of each head.
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Height: 8-30 in.
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description: Erect to leaning perennial from large, black roots found in sandhills, dry pinelands and pine flatwoods.
stems: Stems unbranched, prominently winged and covered with white or rust-colored hairs.
leaves: Leaves alternate, sessile with leaf bases continuing down stem as wings, elliptic or lance-shaped, to 4 1/3 in. long, dark green and nearly smooth above, white and densely hairy beneath.
inflorescence:
flowers: Composite flowers (heads) densely packed in a terminal spike (1-3 in. long), which may nod; heads less than 1/4 in. tall; consisting of tiny, white (pink-tinged), tubular disk florets and protruding styles. Tiny greenish-white bracts tightly surround the cylindric base of each head.
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