Taxon Report

Nemacladus twisselmannii J.T. Howell var. twisselmannii

Twisselmann's nemacladus

Print Report

Taxon Summary

Nemacladus twisselmannii var. twisselmannii, commonly known as Twisselmann's nemacladus, is a annual herb in the Campanulaceae that is found only in California. It occurs within Upper montane coniferous forest (granitic, and sandy or rocky), growing at elevations from 2240 to 2450 meters. Nemacladus twisselmannii var. twisselmannii is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Nemacladus twisselmannii J.T. Howell var. twisselmannii
Common Name:	Twisselmann's nemacladus
Family:	Campanulaceae
Element Code:	PDCAM0F0D2
USDA Plants Symbol:	NETW
Synonyms/Other Names:	Nemacladus twisselmannii

Ecology and Life History


Lifeform:	annual herb
Blooming Period: Jul	Jul
Elevation:	2240-2450 (7350-8040)
General Habitats:	Upper montane coniferous forest
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G1T1
State Rank:	S1
State List:	CR
Fed List:	None
Other Status:	BLM_S; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	2
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	2
Poor (D)	0
None (X)	0
Unknown (U)	0

Location


California Endemic: True
California Counties and Islands: Name (Code)
Kern (KRN), Tulare (TUL)
Quads: Name (Quad Code)
Cannell Peak (3511873), Rockhouse Basin (3511882)

Threat List Data from the CNDDB


Threat List Total:	1
EOs with Threat Listed:	Total EOs	% of EOs
	1	50 %
Other	1	50%

Notes



See Leaflets of Western Botany 10(3-4):45-46 (1963) for original description.
Threats:

Taxonomy:

Selected References

Non-Substantive Name Changes: Multiple taxa in Campanulaceae (2022-12-19)

Madroño 67: 35–60 (2020)

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 5 November 2025].