CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record calycadenia_micrantha - Fri, Nov. 26, 2021 21:11 ET c
Calycadenia micrantha
common namesmall-flowered calycadenia
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life formannual herb
CA Rare Plant Rank
List 1B.2
LIST 1B: Rare, threatened, or endangered in California and elsewhere.
     0.2: Fairly endangered in California
state rank
S2      ranking system key
global rank
G2     G2: 6-20 occurrences OR 1,000-3,000 individuals OR 2,000-10,000 acres
Where did the "RED" code go?
CA state listingNone  
federal listingNone  
where found
MAPS - Use v8 link below.

Topographic quads (14):
Alder Peak (296A) 3512183, Burro Mountain (296D) 3512173, Yountville (500A) 3812243, Highland Springs (534B) 3812288, Bartlett Springs (548B) 3912226, Bartlett Mountain (549A) 3912227, Upper Lake (549B) 3912228, Elk Mountain (565C) 3912238, Potato Hill (565D) 3912237, Black Rock Mountain 15' NW (614B) 4012322, Lake Mountain (615C) 4012314, Long Ridge (615D) 4012313, Sportshaven (633B) 4012344, Blake Mountain (652D) 4012355
quad data info

Counties, states, regions:
Colusa (COL), Humboldt (HUM), Lake (LAK), Monterey (MNT), Napa (NAP), Trinity (TRI)
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Chaparral (Chprl)
•Meadows and seeps (Medws)(volcanic)
•Valley and foothill grassland (VFGrs)/Roadsides, rocky, talus, scree, sometimes serpentinite, sparsely vegetated areas
blooming period Jun-Sep  
elevation range5 - 1500 meters
Most populations small. Surveys at type locality unsuccessful in 2005. Threatened by road maintenance, and potentially threatened by fuel breaks, development, alteration of fire regimes, non-native plants, military activities, and feral pigs. Formerly included in C. truncata ssp. microcephala, a synonym of C. truncata in TJM (1993). See SIDA 21(2):261 (2004) for original description.
full nameCalycadenia micrantha R.L. Carr & G.D. Carr
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym   Element Code  PDAST1P0C0
Jepson Online Jepson Interchange  Jepson Manual and other resources
Google search
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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, Nov. 26, 2021 from

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