CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record piperia_michaelii - Fri, Dec. 3, 2021, 06:11 ET b
Piperia michaelii
common nameMichael's rein orchid
CalPhotos image
more photos
© 2000 Joseph Dougherty  Follow image link for photo data.
life formperennial herb
CA Rare Plant Rank
List 4.2
LIST 4: Limited distribution (Watch List).
     0.2: Fairly endangered in California
state rank
S3      ranking system key
global rank
G3     G3: 21-80 occurrences or 3,000-10,000 individuals OR 10,000-50,000 acres
Where did the "RED" code go?
CA state listingNone  
federal listingNone  
where found
MAPS - Use v8 link below.

Counties, states, regions:
Alameda (ALA), Amador (AMA), Butte (BUT), Contra Costa (CCA), Fresno (FRE), Humboldt (HUM), Los Angeles (LAX)*, Monterey (MNT), Marin (MRN), Santa Barbara (SBA), San Benito (SBT), Santa Clara (SCL), Santa Cruz (SCR), Santa Cruz Isl. (SCZ), San Francisco (SFO), San Luis Obispo (SLO), San Mateo (SMT), Stanislaus (STA), Tulare (TUL), Tuolumne (TUO), Ventura (VEN)(*?), Yuba (YUB)
  • Pending additional quad-level data, only county data are being provided for List 4 plants.
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Coastal bluff scrub (CBScr)
•Closed-cone coniferous forest (CCFrs)
•Chaparral (Chprl)
•Cismontane woodland (CmWld)
•Coastal scrub (CoScr)
•Lower montane coniferous forest (LCFrs)
blooming period Apr-Aug  
elevation range3 - 915 meters
Recent surveys in VEN Co. have been unsuccessful. Known from SCZ Isl. from a single collection in 1968. Possibly threatened by road widening. See Bulletin of the California Academy of Sciences 1:282 (1885) for original description, Bulletin of the Torrey Botanical Club 28:640 (1901) for revised nomenclature, and The Wild Orchids of California, p. 126-128 (1995) by R. Coleman for species account.
full namePiperia michaelii (Greene) Rydb.
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  PIMI6 Element Code  PMORC1X110
CalFlora species this taxon    CalFlora genus related taxa
Jepson Online Jepson Interchange  Jepson Manual and other resources
Google search
search Google CNPS website    search Google entire web

Suggested citation: California Native Plant Society (CNPS). 2018. Inventory of Rare and Endangered Plants (online edition, v7-18mar). California Native Plant Society. Sacramento, CA. Accessed on Fri, Dec. 3, 2021 from

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