The Flora of Montreal Island. 221 
Cirsium muticum, Michx.—Swamp Thistle—August. St. 
Michel. (Holmes’ cnicus muticus). 
Cirsium arvense, Scop.—Canada Thistle-—August. Hvery- 
where. (Holmes’ cnicus horridulus). 
Aanthium strumarium, ., var. Hchinatum, Gray.—Com- 
mon Cocklebur. August. Common. (Holmes). 
Ambrosia artemisicfolia, L.Hogweed.—August. Every- 
where. (Holmes). 
Ambrosia trifida, L.—Great Ragweed.—August. Common. 
(Holmes). 
Tanacetum vulgare, L.—Common Tansy.—August. Road- 
side in many places. 
Artemisia vulgaris, L.—Common Mugwort. — August. 
Everywhere. (Holmes). 
Gnaphalium decurrens, lves.—Kverlasting.—August. Com- 
mon. 
Gnaphalium polycephalum, Michx.—Common Everlasting. 
—August. Common. 
Gnaphalium uliginosum, L.—Low Cudweed.—August. 
Common. (Holmes). 
Antennaria plantaginifolia, Wook.—Plantain-leaved Ever- 
lasting.—May. Everywhere. (Holmes’ Gnaphalium plan- 
taginifolium. 
Eupatorium purpureum, L.—Joe Pye Weed.—August. 
Mountain Park, Cote St. Paul. (Holmes’ E. verticillatum). 
EHupatorium perfoiatum, l:—Boneset.—August. Moun- 
tain Park, Cote St. Antoine. (Holmes). 
Hupatorium ageratoides, Li.—White Snakeroot.—August. 
‘Mountain Park, Cote St. Michel. (Holmes). 
Senecio vulgaris, L.—Common Groundsel.—On all streets. 
July. (Holmes). 
Senecio aureus, L.—Golden Ragwort.—August. St. Michel. 
Solidago squarrosa, Muh]l.—Golden Rod.—Hast slope of 
Mountain. August. 
Solidago bicolor, L., var., Concolor—Golden Rod.—Moun- 
tain base. August. (Holmes). 
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