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Rough Cocklebur
Xanthium
strumarium
Linnaeus
Copy link
Rough Cocklebur: https://marylandbiodiversity.com/species/4455
Synonyms
Xanthium americanum
Xanthium canadense
Xanthium chinense
Xanthium cylindraceum
Xanthium echinatum
Xanthium echinellum
Xanthium pensylvanicum
Xanthium speciosum
Xanthium strumarium var. canadense
Xanthium strumarium var. glabratum
Tags
Non-native
Invasive
Kingdom Plantae
Division Tracheophyta
Class Magnoliopsida
Order Asterales
Family Asteraceae
Genus Xanthium
View Taxonomy
Kingdom Plantae
Division Tracheophyta
Class Magnoliopsida
Order Asterales
Family Asteraceae
Genus Xanthium
Seasonality
About Taxon
Thumbnails
Maps
Seasonality
Seasonality
History
Time of the year
Entire Year (Jan - Dec)
Spring (Mar - May)
Summer (Jun - Jul)
Fall (Aug - Nov)
Winter (Dec - Feb)
Range of years
1901
1902
1903
1905
1916
1917
1919
1920
1924
1928
1929
1930
1931
1936
1937
1942
1945
1951
1953
1954
1956
1960
1961
1979
1980
1981
1982
1983
1988
1990
1992
1993
1995
1996
1997
2001
2003
2005
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2005
2003
2001
1997
1996
1995
1993
1992
1990
1988
1983
1982
1981
1980
1979
1961
1960
1956
1954
1953
1951
1945
1942
1937
1936
1931
1930
1929
1928
1924
1920
1919
1917
1916
1905
1903
1902
1901
Filter by Tag
- - -
Flowers
Fruits or Seeds
No Flowers or Fruits
Green Leaves
Colored Leaves
No Live Leaves
Update
Reset
Total
Records
by Month
For Jan - Dec from 1901 - 2025
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
0
2
4
6
8
10
12
14
16
18
Totals
Source: Maryland Biodiversity Project database
Total
Records
by Year
1905
1910
1915
1920
1925
1930
1935
1940
1945
1950
1955
1960
1965
1970
1975
1980
1985
1990
1995
2000
2005
2010
2015
2020
2025
0
10
20
30
40
50
Totals
Source: Maryland Biodiversity Project database