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Platanthera leucophaea, commonly known as the prairie white fringed orchid [6] or eastern prairie fringed orchid, is a rare species of orchid native to North America. It is a federally threatened species, [ 7 ] protected since October 30, 1989 under the Endangered Species Act of 1973 . [ 8 ]
P. praeclara is distinguished from Platanthera leucophaea, the eastern prairie fringed orchid, by its slightly larger flowers, petal shape, and longer nectar spur. Platanthera praeclara is a long-lived perennial. It emerges in May and blooms in June or in July further north. The flowers are fragrant at night and are pollinated by large sphinx ...
This is a list of genera in the orchid family (Orchidaceae), originally according to The Families of Flowering Plants - L. Watson and M. J. Dallwitz.This list is adapted regularly with the changes published in the Orchid Research Newsletter which is published twice a year by the Royal Botanic Gardens, Kew.
The western prairie fringed orchid is mostly found in reserves, such as the Sheyenne National Grassland in North Dakota and the Manitoba Tall Grass Prairie Preserve. The peak of the orchid's bloom was roughly mid-July. Populations can be as small as one plant or as large as 500 to 1,000, Travers said.
The genus Platanthera belongs to the subfamily Orchidoideae of the family Orchidaceae, and comprises about 150 species of orchids.The members of this genus, known as the butterfly orchids [2] [3] or fringed orchids, [4] were previously included in the genus Orchis, which is a close relative (along with the genus Habenaria).
The Tall Grass Prairie Preserve consists primarily of big bluestem (or turkey foot, resembles the bird's foot), little bluestem, porcupine needlegrass (Stipa spartea), and prairie dropseed grasses. The last known Canadian remnant population of the endangered western prairie fringed orchid (Platanthera praeclara) is within the preserve.
Orchid seeds are very small (0.35mm to 1.50mm long), spindle-shaped, and have an opening at the pointed end. [5] Each seed has an embryo that is undifferentiated and lacks root and shoot meristems. [3] An orchid seed does not have enough nutritional support to grow on its own, and lacks endosperm. [2]
The orchid family (Orchidaceae) is subdivided into five subfamilies, and then into tribes and subtribes. Groups of closely related genera are sometimes referred to informally as alliances . An alliance is a group of taxa, at any taxonomic rank , but usually at the rank of genus or species, that are thought to be closely related.