English: Title: Atlas of the rare vascular plants of Ontario

Identifier: atlasofrareva14198287argu Year: 1982 (1980s) Authors: Argus, George W. (George William); National Museum of Natural Sciences (Canada). Botany Division Subjects: Rare plants; Botany Publisher: Ottawa : Botany Division, National Museum of Natural Sciences = Division de la botanique, Musée national des sciences naturelles Contributing Library: Smithsonian Libraries Digitizing Sponsor: Biodiversity Heritage Library

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Text Appearing After Image: Z^ ,19^ ^ Aflor/Capr*»: Cody 1954, Dom ⢠Fassen 1928. Gould 1962. Harringlon 1954, mchcoCkelaJ. 1955-1969, Hullén 1958. 1968. MacRobens 1984, Moriey 1972, s Munz 1959, Porslld & Cody 1980, Smith \ 1978. Stratey ef a/. 19S5 -^^ HABITAT: Sandy lagoon in Ontario. Tolerant of both fresh and brackish water; in northeastern North America it mostly occurs in the intertidal mudflats of estuaries, or in mud or wet sand of receding pond margins, where it can form moss-like tufts. STATUS: Rare in British Columbia, Newfoundland, Northwest Territories, Nova Scotia, Prince Edward Island, and Quebec. Possibly extirpated in Connecticut, Delaware, Maine, and Pennsylvania; endangered in New Hampashire; threatened in Massachusetts; rare in Arkansas, Colorado, Maryland, New York, Vermont, and Wyoming. NOTES: Crassula aquatica is the only species of this genus that occurs in northeastern North America. It is a minute (usually 2-5 cm high) annual or biennial herb with narrow succulent leaves that are fused around the stem, and with tiny flowers borne in the leaf axils. Due to its insignificant stature and moss- like appearance, it is probably often overlooked. Thomas (1971) has nicknamed these as "belly plants" to describe his effective technique for turning up these inconspicuous plants. Through similar efforts. Hinds (1986 and pars, comm.) has established that water pigmy-weed is much more common in New Brunswick than once believed. It is HABITAT: Lagune sablonneuse en Ontario. L'espèce tolère l'eau douce et saumâtre; dans le nord-est de l'Amérique du Nord, elle apparaît principalement sur les vasières intertidales des estuaires, ou dans la vase ou le sable mouillé des marges d'étang en recul, où elle peut former des touffes ressemblant à de la mousse. SITUATION: Rare en Colombie-Britannique, à l'île du Prince-Edouard, en Nouvelle-Ecosse, au Québec, à Terre-Neuve et dans les Territoires du Nord-Ouest. Peut-être déracinée au Connecticut, au Delaware, dans le Maine et en Pennsylvanie; menacée d'extinction au New Hampshire; menacée au Massachusetts; rare dans l'Arkansas, le Colorado, le Maryland, l'Ãtat de New York, le Vermont et le Wyoming. REMARQUES: Crassula aquatica est la seule espèce du genre qui apparaisse dans le nord-est de l'Amérique du Nord. Il s'agit d'une plante herbacée de petite taille (généralement 2-5 cm de hauteur), annuelle ou bisannuelle, portant des feuilles étroites et charnues qui se fondent autour de la tige, et de toutes petites fleurs situées dans les aisselles des feuilles. à cause de sa faible taille et de son apparence proche de celle des mousses, il est

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