Ram's-head Lady's-slipper (Cypripedium arietinum) R. Brown 1813

 

Synonyms: Arietinum americanum, Criosanthes parviflora, Criosanthes borealis

 

Ram's-head Lady's-slipper is a rare orchid distributed patchily around the Great Lakes and in New England in North America, with an isolated population in Nova Scotia. Cypripedium arietinum occurs in a variety of habitats including coniferous forest, alvars, bogs, swamps, and wooded rocky slopes, up to 1,000 m. This lady's-slipper prefers soils with low acidity, but this is not a limiting factor. Ram's-head flowers in May and June.

 

		D28429 Ram's-head Lady's-slipper (Cypripedium arietinum) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved
		D28431 Ram's-head Lady's-slipper (Cypripedium arietinum) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved
		D28339 Ram's-head Lady's-slipper (Cypripedium arietinum) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved
		D28341 Ram's-head Lady's-slipper (Cypripedium arietinum) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved
		D28334 Ram's-head Lady's-slipper (Cypripedium arietinum) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved
		D47528 Ram's-head Lady's-slipper (Cypripedium arietinum) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved
		D28336 Ram's-head Lady's-slipper (Cypripedium arietinum) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved
		D28340 Ram's-head Lady's-slipper (Cypripedium arietinum) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved
		D28327 Ram's-head Lady's-slipper (Cypripedium arietinum) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved
		D49475 Ram's-head Lady's-slipper (Cypripedium arietinum) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved
		D28439 Ram's-head Lady's-slipper (Cypripedium arietinum) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved
		D49479 Ram's-head Lady's-slipper (Cypripedium arietinum) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved

 

		D49495 Ram's-head Lady's-slipper (Cypripedium arietinum) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved
		D49487 Ram's-head Lady's-slipper (Cypripedium arietinum) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved
		D28344 Ram's-head Lady's-slipper (Cypripedium arietinum) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved
		D28335 Ram's-head Lady's-slipper (Cypripedium arietinum) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved
		D28346 Ram's-head Lady's-slipper (Cypripedium arietinum) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved
		D28426 Ram's-head Lady's-slipper (Cypripedium arietinum) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved
		D28436 Ram's-head Lady's-slipper (Cypripedium arietinum) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved The purple flowers in the foreground are Fringed Polygala (Polygala paucifolia)
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