Compilation
Pterocaulon virgatum

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Name

Identification
Gnaphalium virgatum L. [family ASTERACEAE ] (stored under name); Pterocaulon virgatum (L.) DC. [family ASTERACEAE ]
Related name
  • Pterocaulon alopecuroides
  • Pterocaulon virgatum
  • Pterocaulon subvirgatum
  • Pterocaulon spicatum
  • Gnaphalium virgatum
  • Conyza virgata
  • Pterocaulon alopecuroideum
  • Pterocaulon pompilianum
  • Baccharis erioptera
  • Pterocaulon interruptum
Common name
  • Wand blackroot, Flora of North America Vol. 19

Flora

Entry for Pterocaulon virgatum (Linnaeus) de Candolle [family COMPOSITAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 19,
Names
Pterocaulon virgatum (Linnaeus) de Candolle [family COMPOSITAE], in A. P. de Candolle and A. L. P. P. de Candolle, Prodr., 5: 454. 1836
Gnaphalium virgatum Linnaeus [family COMPOSITAE], Syst. Nat. ed., 10, 2: 1211. 1759
Treatment Author(s)
Guy L. Nesom
Information
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). Heads in open, inter-rupted, ± cylindric arrays (5–)8–20 cm (main axes visible between glomerules of heads). Involucres campanulate to cylindric, 4–5 mm. Pistillate florets 25–50. Functionally staminate florets 2–4(–5). Cypselae 1–1.4 mm.
Phenology
aug (summer), sep-oct (fall)
Altitude range
0–20 m;
Distribution
Mexico (Tamaulipas)West IndiesCentral AmericaSouth America.USA La.USA Tex.

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