BCP/Cirsium arvense

Cirsium arvense

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Profile for Cirsium arvense (Canada Thistle)

Identifying Characteristics
Habit:	Spreading herbaceous plant
Flowers:	Heads
Foliage:	Spiny
Stem:	Spiny
Life Cycle:	Perennial

Recent Logs

--SB_Johnny | ^talk 10:02, 1 September 2007 (UTC)
--Luai lashire 01:27, 14 October 2007 (UTC)
--Luai lashire 00:52, 25 October 2007 (UTC)
--SB_Johnny | ^talk 11:09, 7 June 2008 (UTC)
--SB_Johnny | ^talk 09:49, 14 July 2008 (UTC)
Jomegat 23:39, 4 September 2008 (UTC)
(view all logs)

Global data:
Temperate zone season(s): Early Summer, Mid Summer, Late Summer, Early Fall

Regional data and additional images for Cirsium arvense

Regional data:
Southeastern Pennsylvania: (invasive or naturalized) June, July, August, September
New Hampshire: September
Central Pennsylvania: August , October

Additional images:

Please contribute!

This page is a profile for the plant species Cirsium arvense, used to collect records of where and when this plant was observed blooming, and for providing identification information for use in dichotomous keys. If you would like to help collect data for this or other plants, see Bloom clock project/How to Contribute for orientation.