Taxon Report

Aspidotis carlotta-halliae (Wagn. & Gilb.) Lellinger

Carlotta Hall's lace fern

Print Report

Taxon Summary

Aspidotis carlotta-halliae, commonly known as Carlotta Hall's lace fern, is a perennial rhizomatous herb in the Pteridaceae that is found only in California. It occurs within Chaparral, and Cismontane woodland, growing at elevations from 100 to 1400 meters. Aspidotis carlotta-halliae is ranked 4.2, Plants of Limited Distribution, A Watch List; Moderately threatened in California.

Classification


Scientific Name:	Aspidotis carlotta-halliae (Wagn. & Gilb.) Lellinger
Common Name:	Carlotta Hall's lace fern
Family:	Pteridaceae
Element Code:	PPADI07020
USDA Plants Symbol:	ASCA17
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial rhizomatous herb
Blooming Period: Jan-Dec	Jan-Dec
Elevation:	100-1400 (330-4595)
General Habitats:	Chaparral, Cismontane woodland
Microhabitat:	Serpentine (usually)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.2
Global Rank:	G3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB


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

Location


California Endemic: True
California Counties and Islands: Name (Code)
Alameda (ALA), Butte (BUT), Marin (MRN), Monterey (MNT), San Benito (SBT), San Luis Obispo (SLO), Santa Clara (SCL)
Quads: Name (Quad Code)
Alder Peak (3512183), Bolinas (3712286), Burnett Peak (3512172), Burro Mountain (3512173), Cape San Martin (3512184), Cedar Mtn. (3712155), Cypress Mountain (3512058), Hepsedam Peak (3612037), Idria (3612046), Morro Bay South (3512037), Mt. Boardman (3712144), Paicines (3612163), Pebblestone Shut-in (3512161), Pulga (3912174), San Benito Mtn. (3612036), San Francisco North (3712274), San Luis Obispo (3512036), San Quentin (3712284), San Rafael (3712285), San Simeon (3512162), Ventana Cones (3612136), Villa Creek (3512174)

Threat List Data from the CNDDB


Threat List Total:	0
EOs with Threat Listed:	Total EOs	% of EOs
	0	0 %

Notes



Fertile hybrid between A. californica and A. densa; sometimes backcrosses. See American Journal of Botany 44:738 (1957) for original description, and American Fern Journal 58:141 (1968) for revised nomenclature.
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 10 March 2025].