Taxon Details

Piperia candida

white-flowered rein orchid

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Taxon Summary:

Piperia candida, commonly known as white-flowered rein orchid, is a perennial herb in the Orchidaceae that is found in California and elsewhere. It occurs within Broadleafed upland forest, Lower montane coniferous forest, and North Coast coniferous forest, growing at elevations from 30 to 1310 meters. Piperia candida is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Piperia candida Morgan & Ackerman
Common Name: white-flowered rein orchid
Family:	Orchidaceae
Element Code:	PMORC1X050
USDA Plants Symbol:	PICA13
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G3?
State Rank:	S3
Other Status:	BLM_S; SB_CalBG/RSABG
CRPR Changes: changed from 4.3 to 1B.2 on 2007-10-01
Add Date:	1994-01-01
Date Edited:	2024-11-05

Ecology and Life History

Lifeform: perennial herb

Blooming Period: (Mar-Apr)May-Sep

Elevation:
30 - 1310 meters
100 - 4300 feet

General Habitats:

Broadleafed upland forest
Lower montane coniferous forest
North Coast coniferous forest

Microhabitat Details:

Microhabitat:

Serpentine (sometimes)

Notes

Notes: Difficult to determine rarity as some populations rarely flower. Populations often have small numbers. Difficult to identify from herbarium material.
Threats: Threatened by logging, foot traffic, and road construction.
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	14
	Total EOs	% of EOs
EOs with Threat Listed:	154	69 %
Logging	134	60%
Road/trail construction/maint.	54	24%
Other	16	7%
Foot traffic/trampling	7	3%
Non-native plant impacts	3	1%
ORV activity	2	0%
Grazing	2	0%
Altered flood/tidal/hydrologic regime	2	0%
Recreational use (non-ORV)	2	0%
Erosion/runoff	2	0%
Vandalism/dumping/litter	1	0%
Development	1	0%
Improper burning regime	1	0%
Mining	1	0%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					222
A	B	C	D	X	U
6	83	65	13	1	54

Occurrence Status:
Historical >20 Years	42
Recent <=20 Years	180

Presence:
Presumed Extant	221
Possibly Extirpated	1
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA), Oregon (OR), Washington (WA)?

California Counties and Islands: Name (Code)
Del Norte (DNT), Humboldt (HUM), Mendocino (MEN), San Mateo (SMT), Santa Clara (SCL), Santa Cruz (SCR), Siskiyou (SIS), Sonoma (SON), Trinity (TRI)

Quads: Name (Quad Code)
Annapolis (3812363), Bailey Ridge (3912324), Bald Hills (4112328), Bear Harbor (3912388), Big Basin (3712222), Big Foot Mtn. (3812372), Blake Mountain (4012355), Board Camp Mtn. (4012366), Briceland (4012318), Bridgeville (4012347), Broken Rib Mtn. (4112386), Buckeye Mtn. (4012432), Bull Creek (4012431), Burbeck (3912344), Cahto Peak (3912365), Cant Hook Mtn. (4112368), Castle Rock Ridge (3712221), Cazadero (3812351), Childs Hill (4112461), Cold Spring (3912315), Comptche (3912335), Crannell (4112411), Davenport (3712212), Eaton Peak (4112238), Elk (3912326), Ettersburg (4012328), Eureka Hill (3812385), Felton (3712211), Fish Lake (4112336), Forest Glen (4012333), Fort Seward (4012326), French Camp Ridge (4112327), Garberville (4012317), Gasquet (4112378), Greenough Ridge (3912334), Guerneville (3812258), Hales Grove (3912377), Harris (4012316), High Plateau Mtn. (4112388), Hiouchi (4112471), Holter Ridge (4112338), Honeydew (4012421), Hoopa (4112316), Hupa Mountain (4112317)?, Hurdygurdy Butte (4112377), Hyampom (4012354), Iaqua Buttes (4012368), Johnsons (4112337), Kangaroo Mtn. (4112382), Larabee Valley (4012346), Laytonville (3912364), Leggett (3912376), Lincoln Ridge (3912366), Longvale (3912354), Lord-ellis Summit (4012387), Mad River Buttes (4012367), Maple Creek (4012377), Mathison Peak (3912336), McGuire Ridge (3812374), Mindego Hill (3712232), Miranda (4012327), Myers Flat (4012337), Naufus Creek (4012343), Navarro (3912325), Noble Butte (3912386), Northspur (3912345), Ornbaun Valley (3812383), Orrs Springs (3912323), Philo (3912314), Piercy (3912387), Pony Buck Peak (4012331), Preston Peak (4112375), Rodgers Peak (4112421), Salyer (4012385), Sawyers Bar (4112332), Scotia (4012441), Seiad Valley (4112372), Shelly Creek Ridge (4112387), Sherwood Peak (3912355), Showers Mtn. (4012356), Sims Mountain (4012365), Smoky Creek (4012332), Somes Bar (4112344), Thurston Peaks (4012382), Trinidad (4112412), Weitchpec (4112326), Weott (4012338), Willits (3912343), Willow Creek (4012386), Zeni Ridge (3812384)

Notes:

Definitions of codes following a county and/or quad:
*		Presumed extirpated
(?)		Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Regional Map

Map

Presumed Extant

Click on quad for name. Hold Shift Key to use mouse scroll wheel

CNPS Status Review:	Proposed Addition to CNPS List 1B.2
Original Description:	Lindleyana 5(4):205-211 (1990)
Species Account:	The Wild Orchids of California, p. 109-110 (1995) by R. Coleman
Species Account:	Piperia candida profile for potential Species of Conservation Concern evaluation (2018)
Other:	USFS Potential Species of Conservation Concern Profile

CNPS Rare Plant Inventory