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Posts tagged “Cipripedium arietinum

Ram’s-head Lady’s Slippers Flowering

6-6-7 ram's-head orchid 273

Because of the small size of its flower, the brevity of its flowering period, and its rarity (ranked critically imperiled or imperiled throughout its range in New England), Ram’s-Head Lady’s Slipper is notoriously hard to find.  Its preferred habitat is moist, mossy bogs, but it can also be found in mixed woods and uplands.  If you’re fortunate enough to set eyes on one of these orchids, the diminutive size and conical-shape of its flower, compared to other Cypripedium species (Yellow, Pink and Showy Lady’s Slippers), will be strikingly apparent.

The flowers (which appear only if the plant is at least four inches high) mature in mid-May to early June, often developing very rapidly and typically lasting only a week or so. The sepals, lateral petals, and particularly the lower lip, or labellum (pouch made of fused petals), produce a sweet odor to attract potential pollinators, such as small bees.   Once the flower is fertilized, the upper sepal lowers over the opening of the pouch (see insert), excluding additional visitors. Although individual plants can produce copious numbers of minute seeds, reproduction appears to be largely asexual via offshoots of parent plants.

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