Taxon Report

Sphaerocarpos drewiae Wigglesw.

bottle liverwort

Print Report

Taxon Summary

Sphaerocarpos drewiae, commonly known as bottle liverwort, is a ephemeral liverwort in the Sphaerocarpaceae that is found only in California. It occurs within Chaparral, and Coastal scrub, growing at elevations from 90 to 600 meters. Sphaerocarpos drewiae is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification


Scientific Name:	Sphaerocarpos drewiae Wigglesw.
Common Name:	bottle liverwort
Family:	Sphaerocarpaceae
Element Code:	NBHEP35030
USDA Plants Symbol:	SPDR2
Synonyms/Other Names:	Sphaerocarpos drewei Wigglesw.

Ecology and Life History


Lifeform:	ephemeral liverwort
Blooming Period:
Elevation:	90-600 (295-1970)
General Habitats:	Chaparral, Coastal scrub
Microhabitat:	Openings
Microhabitat Details:	soil

Conservation Status


CA Rare Plant Rank:	1B.1
Global Rank:	G1
State Rank:	S1
State List:	None
Fed List:	None
Other Status:	IUCN_EN
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	23
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	3
Unknown (U)	20

Location


California Endemic: True
California Counties and Islands: Name (Code)
Riverside (RIV), San Diego (SDG)
Quads: Name (Quad Code)
Bonsall (3311732), Del Mar (3211782), Fallbrook (3311743), Idyllwild (3311666), Imperial Beach (3211751), Jamul Mountains (3211668), Julian (3311615), La Jolla (3211772), Mesa Grande (3311627), Mount Laguna (3211674), Murrieta (3311752), National City (3211761), Point Loma (3211762), Poway (3211781), San Marcos (3311722), Vail Lake (3311648), Wildomar (3311753)

Threat List Data from the CNDDB


Threat List Total:	2
EOs with Threat Listed:	Total EOs	% of EOs
	4	17 %
Development	4	17%
Road/trail construction/maint.	1	4%

Notes



Much of the suitable historic habitat lost to urbanization. See University of California Publications in Botany 16:129-137 (1929) for original description.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 23 February 2025].