E-Flora BC: Electronic Atlas of the Flora of British Columbia

Piperia elongata Rydb.
tall rein orchid (denseflower rein orchid)
Orchidaceae (Orchid family)

Introduction to Vascular Plants

© Mark Gardiner  Email the photographer   (Photo ID #56210)

E-Flora BC Static Map
Distribution of Piperia elongata
Click here to view our NEW interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Species Information

Click on the image below to view an expanded illustration for this species.

Perennial herb from tubers, 1-4 cm long, with a few fibrous roots; stems 20-100 cm tall.
Basal 2 to 5, oblanceolate, 6-30 cm long, 1-6.5 cm wide, blunt-tipped; stem leaves bractlike.
Inflorescence a terminal, spikelike raceme, 15-30 cm long, open to densely-flowered, the flowers small, green, not scented; sepals 2-5.5 mm long, lanceolate, the upper sepal more or less erect, the lateral somewhat bent back; petals 2-5.5 mm long, sickle-shaped, usually erect; lip 2-5.5 mm long, triangular, bent back; spur 6.5-15 mm long, slender, commonly pointed downward; column oblong, about twice as long as wide.
Capsules, ascending to erect.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry forests, forest margins and shrublands in the lowland to montane zones; infrequent in S BC; S to ID, MT, OR and CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Piperia elongata

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 447 859 1160
Slope Gradient (%) 0 41 65
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
128 175 248
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 1 2
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: ICH(6), IDF(1)


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Habenaria unalascensis subsp. elata (Jepson) Calder
Habenaria unalascensis var. elata (Jeps.) Correll
Piperia elegans var. elata (Jepson) Luer
Piperia lancifolia Rydb.
Piperia longispica Dur.
Platanthera unalascensis subsp. elata (Jeps.) Roy L. Taylor & MacBryde

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References