Lechea mucronataRaf.

hairy pinweed

WFO wfo-0001295628 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Lechea mucronata, photographed by Ryan Sorrells
fig. a Ryan Sorrells, CC BY 4.0 / 2021-08-26 / obs. 153595401
Lechea mucronata, photographed by Owen Strickland
fig. b Owen Strickland, CC BY 4.0 / obs. 150584590
Lechea mucronata, photographed by Michael W Belitz
fig. c Michael W Belitz, CC0 1.0 / obs. 125004394
Lechea mucronata, photographed by Reuven Martin
fig. d Reuven Martin, CC0 1.0 / obs. 93193172
Lechea mucronata, photographed by Sam Kieschnick
fig. e Sam Kieschnick, CC BY 4.0 / obs. 55596332
Lechea mucronata, photographed by cwarneke
fig. f cwarneke, CC0 1.0 / obs. 8828158
Lechea mucronata, photographed by Sam Kieschnick
fig. g Sam Kieschnick, CC BY 4.0 / obs. 4289388
Lechea mucronata, photographed by Sam Kieschnick
fig. h Sam Kieschnick, CC BY 4.0 / obs. 4184290

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 37 botanical countries

Regions where Lechea mucronata is native: Alabama, Arkansas, Connecticut, Delaware, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maryland, Massachusetts, Mexico Gulf, Mexico Northeast, Michigan, Mississippi, Missouri, Nebraska, New Hampshire, New Jersey, New Mexico, New York, North Carolina, Ohio, Oklahoma, Ontario, Pennsylvania, Rhode I., South Carolina, Tennessee, Texas, Vermont, Virginia, West Virginia, Wisconsin AlabamaArkansasConnecticutFloridaGeorgiaIllinoisIndianaIowaKansasKentuckyLouisianaMarylandMassachusettsMexico GulfMexico NortheastMichiganMississippiMissouriNebraskaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaOhioOklahomaOntarioPennsylvaniaSouth CarolinaTennesseeTexasVermontVirginiaWest VirginiaWisconsin DelawareRhode I.
Native distribution of Lechea mucronata, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows. Regions too small to draw at this scale are marked with a dot.
RegionTDWG codeContinent
Alabama ALA NORTHERN AMERICA
Arkansas ARK
Connecticut CNT
Delaware DEL
Florida FLA
Georgia GEO
Illinois ILL
Indiana INI
Iowa IOW
Kansas KAN
Kentucky KTY
Louisiana LOU
Maryland MRY
Massachusetts MAS
Mexico Gulf MXG
Mexico Northeast MXE
Michigan MIC
Mississippi MSI
Missouri MSO
Nebraska NEB
New Hampshire NWH
New Jersey NWJ
New Mexico NWM
New York NWY
North Carolina NCA
Ohio OHI
Oklahoma OKL
Ontario ONT
Pennsylvania PEN
Rhode I. RHO
South Carolina SCA
Tennessee TEN
Texas TEX
Vermont VER
Virginia VRG
West Virginia WVA
Wisconsin WIS

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Where it actually grows measured, from 718 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -7.6 °C 2.8 °C 9.7 °C
Warmest month, mean daily high 25.6 °C 31.8 °C 34.8 °C
Annual rainfall 943 mm 1,243 mm 1,543 mm
Rainfall in the driest quarter 160 mm 238 mm 315 mm

It is found where winters bring hard frost. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 718 research-grade observations of Lechea mucronata that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.

Also published as 9 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Lechea major var. villosa (Elliott) Grossh.
  • Lechea minor var. villosa (Elliott) B.Boivin
  • Lechea mucronata var. ramosa Raf.
  • Lechea mucronata var. sessiliflora Raf.
  • Lechea mucronata var. simplex Raf.
  • Lechea villosa Elliott
  • Lechea villosa var. macrotheca Hodgdon
  • Lechea villosa var. schaffneri Hodgdon
  • Lechea villosa var. typica Hodgdon

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
  4. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.