Minnesota Seasons - giant chickweed


Conservation Status
IUCN Red List	not listed
NatureServe	NNA - Not applicable SNA - Not applicable
Minnesota	not listed


Weed Status
Giant chickweed is listed as a Noxious Weed in California, an Invasive Species in New Jersey, and an Invasive Plant Species in West Virginia. It is not listed in any other state, including Minnesota.

The opposite leaves are up to 2″ long and up to 1″ wide. They are mostly stalkless except the lower leaves, which are on short stalks.

The flowers are ¼″ to ½″ wide when fully open. The petals are much longer than the sepals. There are 5 styles.

4″ to 32″

White

The flowers of other chickweeds are no more than ⅓" wide when fully open.

Moist or wet. Woods, disturbed sites.

May to October


Distribution
		Sources 2, 3, 4, 5, 7, 22, 24, 28, 29, 30.
7/10/2024

Nativity
Native to Asia, Europe, and the Indian subcontinent. Introduced and naturalized in the United States.

Occurrence


Taxonomy
Kingdom	Plantae (green algae and land plants)
Subkingdom	Viridiplantae (green plants)
Infrakingdom	Streptophyta (land plants and green algae)
Superdivision	Embryophyta (land plants)
Division	Tracheophyta (vascular plants)
Subdivision	Spermatophytina (seed plants)
Class	Magnoliopsida (flowering plants)
Subclass	Caryophyllidae
Superorder	Caryophyllanae
Order	Caryophyllales (pinks, cactuses, and allies)
Family	Caryophyllaceae (pink)
Subfamily	Alsinoideae
Tribe	Alsineae
Genus	Myosoton (chickweeds)

Subordinate Taxa


Synonyms
Alsine aquatica Cerastium aquaticum Malachium aquaticum Stellaria aquatica

Common Names
giant chickweed giantchickweed water chickweed


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