Flora of North America species comparison

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Pterocaulon virgatum

wand blackroot
Habit Plants 4–15 dm.
Leaf

blades linear to narrowly elliptic or linear-lanceolate, 5–10(–15) cm × (2–)5–10(–14) mm, lengths mostly 6–8 times widths, margins entire or minutely denticulate (revolute).
Involucres

campanulate to cylindric, 4–5 mm.
Pistillate florets

25–50.
Heads

in open, interrupted, ± cylindric arrays (5–)8–20 cm (main axes visible between glomerules of heads).
Cypselae

1–1.4 mm.
Functionally

staminate florets 2–4(–5).

Pterocaulon virgatum
Phenology Flowering Aug–Oct.
Habitat Marshy areas, ditches, moist places in woods, in sand, sandy loam, and sandy clay
Elevation 0–20 m (0–100 ft)
Distribution
from FNA
LA; TX; Central America; South America; Mexico (Tamaulipas); West Indies
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 19, p. 477.
Parent taxa Asteraceae > tribe Plucheeae > Pterocaulon
Sibling taxa
P. pycnostachyum
Synonyms Gnaphalium virgatum
Name authority (Linnaeus) de Candolle: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 454. (1836)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

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