Toxicity: Marsh ragwort is considered a vegetable and safe for human consumption; the young leaves and flowering stems of
Senecio congestus can be eaten raw as salad, cooked as a potherb or made into a "sauerkraut",
Noxiousness:
Tephroseris palustris appears on a list of North Dakota plants to be monitored, and one from the
Arctic Institute of North America of the
University of Calgary or from an unpublished report from the
Canadian Wildlife Service made available by the USFWS: •
Akimiski Island in the Canadian
Northwest Territories where
swards of
Puccinellia phryganodes and
Carex subspathacea have been replaced with dead
willow stands and
mudflats growing non-forage plant species, including
Glaux maritima and
Senecio congestus •
Cape Churchill Region and
La Pérouse Bay,
Manitoba where the expanding population of lesser snow geese has resulted in substantial changes to all
intertidal habitats. In the vicinity of the coast extensive
moss carpets are present and
Senecio congestus and
Salicornia borealis are widespread. • Karrak Lake,
Nunavut where growth in populations of Ross's geese (
Chen rossii) and lesser snow geese (
Chen caerulescens) has led to a decline in vegetative cover and areas with a 10-year or longer history of goose nesting than in areas with less than 10 years of nesting had more instance of exposed mineral substrate, exposed peat, and
Senecio congestus.
Tephroseris palustris is reported to be
extirpated in
Michigan. ==References==