Jepson eFlora: Taxon page
Vascular Plants of California
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Piperia transversa
FLAT SPURRED PIPERIA


Higher Taxonomy
Family: OrchidaceaeView DescriptionDichotomous Key
Common Name: ORCHID FAMILY
Habit: Perennial herb, terrestrial [growing on other pls], non-green (nutrition from association of roots with fungi) or green, generally from rhizomes or tubers with few to many fleshy to slender roots; cauline leaves +- reduced to sheathing stem bracts or not. Leaf: 1--many, basal to cauline, linear to +- round, alternate to opposite (if only 1 pair), generally sessile. Inflorescence: flowers 1--many, spike or raceme, bracted. Flower: bisexual, bilateral, in bud generally rotating 180° by twisting ovary (position of parts indicated after twisting); sepals generally 3, generally free, generally petal-like, uppermost generally erect, lateral with chin- or spur-like projection (mentum) or not; petals 3, 1 (lip) different, spurred or not; stamens generally 1 (3 in Cypripedium, 2 functional, 1 a staminode), fused with style, stigma into column, pollen generally lumped, generally removed as unit by insect; ovary inferior, 1-chambered, placentas 3, parietal, stigma 3 lobed, generally under column tip. Fruit: capsule. Seed: many, minute.
Genera In Family: +- 800 genera, +- 25000 species: especially tropics (worldwide except Antarctica). Many cultivated for ornamental, especially Cattleya, Cymbidium, Epidendrum, Oncidium, Paphiopedilum; Vanilla planifolia Andrews fruits used to flavor food. Note: Platanthera may be paraphyletic without inclusion of Piperia (Bateman et al. 2009 Ann Bot 104:431--445); study needed.
eFlora Treatment Author: Ronald A. Coleman, Dieter H. Wilken & William F. Jennings, except as noted
Scientific Editor: Ronald A. Coleman, Thomas J. Rosatti.
Genus: PiperiaView DescriptionDichotomous Key


Common Name: PIPERIA
Habit: Plant 10--130 cm; tubers, 1--4 cm, generally +- round; stem bracts lance-linear to ovate. Leaf: at flower 0 or +- basal, not in rosette, 2--5, linear to widely oblanceolate. Inflorescence: spike or raceme, generally cylindric, flowers not in spiral; flower bract generally < flower. Flower: fragrance, when present, generally at night; perianth white to green; sepals generally 2--5 mm, 1--2 mm wide, 1-veined, upper pointed forward to erect, lower free, spreading to reflexed; lateral petals +- = sepals, spreading to erect, lip spurred, pointed forward, down (or upcurved); column < lip; ovary inferior, generally twisted 180°. Fruit: ascending to erect.
Species In Genus: 10 species: North America. Etymology: (Charles V. Piper, American botanist, 1867--1926) Note: Some species difficult to separate.
eFlora Treatment Author: James D. Ackerman & Robert Lauri
Reference: Ackerman & Morgan 2002 FNANM 26:571--577
Unabridged Reference: Morgan & Ackerman 1990 Lindleyana 5: 205--211
Piperia transversa Suksd.
NATIVE
Habit: Plant 12--57 cm. Leaf: basal 6--19 cm, 10--45 mm wide. Inflorescence: 7--26 cm, +- dense. Flower: fragrance clove-like; sepals, lateral petals white to +- yellow with green midvein; upper sepal pointed forward; lateral petals spreading, +- curved back, lip 2.2--5.3 mm, oblong to +- ovate, pointed forward or down, white, spur 6--12 mm, +- straight, perpendicular to inflorescence axis. Chromosomes: 2n=42.
Ecology: Generally dry sites, scrub, oak woodland, mixed-evergreen or conifer forest; Elevation: < 2600 m. Bioregional Distribution: NW, CaR, SN, CW, TR, PR; Distribution Outside California: to British Columbia. Flowering Time: May--Aug
Jepson eFlora Author: James D. Ackerman & Robert Lauri
Reference: Ackerman & Morgan 2002 FNANM 26:571--577
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Botanical illustration including Piperia transversa

botanical illustration including Piperia transversa

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Citation for this treatment: James D. Ackerman & Robert Lauri 2012, Piperia transversa, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=38359, accessed on October 19, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on October 19, 2019.

Piperia transversa
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© 2015 Aaron Schusteff
Piperia transversa
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© 2012 Neal Kramer
Piperia transversa
click for enlargement
© 2015 Aaron Schusteff
Piperia transversa
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© 2018 Neal Kramer
Piperia transversa
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© 2007 Chris Winchell
Piperia transversa
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© 2013 Barry Rice

More photos of Piperia transversa in CalPhotos



Geographic subdivisions for Piperia transversa:
NW, CaR, SN, CW, TR, PR
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).





 

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Data provided by the participants of the  Consortium of California Herbaria.
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All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.