California Native Plant Society
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Flat Spurred Piperia
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Piperia transversa

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About Flat Spurred Piperia (Piperia transversa) Piperia transversa (syn: Platanthera transversa), is a species of orchid known by the common names royal rein orchid and flat spurred piperia. It is native to western North America from British Columbia to California, where it can be found in forest, woodland, chaparral, and scrub habitat, often in dry areas. This orchid grows erect to about 55 centimeters in maximum height from a bulbous caudex. The basal leaves are up to 19 centimeters long by 4 wide. Leaves higher on the stem are much reduced. The upper part of the stem is a spikelike inflorescence of many flowers which are white or yellowish with green veining. They are fragrant in the evenings and are said to have a scent like cloves. They are pollinated by geometrid moths.
Plant Description
Plant Type
Perennial herb

Native Status

Natural Setting
Elevation ?
-75' - 7475'

Annual Precip. ?
20.6" - 95.5"

Summer Precip. ?
0.21" - 2.69"

Coldest Month ?
27.5° F - 49.8° F

Hottest Month ?
55.4° F - 75.7° F

Humidity ?
0.01 vpd - 24.45 vpd

Landscaping Information
Nursery Availability
Never or Almost Never Available

Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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