Taxon Report

Tuctoria greenei (Vasey) J. Reeder

Greene's tuctoria

Print Report

©2008 F. Gauna

Classification


Scientific Name:	Tuctoria greenei (Vasey) J. Reeder
Common Name:	Greene's tuctoria
Family:	Poaceae
Element Code:	PMPOA6N010
USDA Plants Symbol:	TUGR
Synonyms/Other Names:	Orcuttia greenei Vasey

Ecology and Life History


Lifeform:	annual herb
Blooming Period: May-Jul(Sep)	May-Jul(Sep)
Elevation:	30-1070 (100-3510)
General Habitats:	Vernal pools
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.1
Global Rank:	G1
State Rank:	S1
State List:	CR
Fed List:	FE
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	50
Element Occurrence Ranks:
Excellent (A)	3
Good (B)	12
Fair (C)	6
Poor (D)	5
None (X)	19
Unknown (U)	5

Location


California Endemic: True
California Counties and Islands: Name (Code)
Butte (BUT), Fresno (FRE), Glenn (GLE), Madera (MAD), Merced (MER), Modoc (MOD), San Joaquin (SJQ), Shasta (SHA), Stanislaus (STA), Tehama (TEH), Tulare (TUL)*
Quads: Name (Quad Code)
Biggs (3912146), Clovis (3611976), Cooperstown (3712065), Donica Mtn. (4112132), Escalon (3712078), Farmington (3712088), Hamlin Canyon (3912166), Haystack Mtn. (3712043), Kismet (3712011), Le Grand (3712022), Llano Seco (3912158), Logandale (3912242), Montpelier (3712056), Murken Bench (4012174), Nord (3912178), Owens Reservoir (3712032), Paulsell (3712066), Peters (3712181), Planada (3712033), Richardson Springs NW (3912188), Round Mountain (3611975), Sanger (3611965), Shippee (3912156), Vina (3912281), Waterford (3712067), Woodlake (3611941)

Threat List Data from the CNDDB


Threat List Total:	12
EOs with Threat Listed:	Total EOs	% of EOs
	42	84 %
Grazing	29	58%
Agriculture	20	40%
Non-native plant impacts	13	26%
Foot traffic/trampling	5	10%
Disking	3	6%
Development	2	4%
Altered flood/tidal/hydrologic regime	2	4%
Biocides	1	2%
Other	1	2%
Road/trail construction/maint.	1	2%
Surface water diversion	1	2%
Mining	1	2%

Notes



Threatened by agriculture, urbanization, overgrazing, and habitat fragmentation and loss. See Botanical Gazette 16:146 (1891) for original description, American Journal of Botany 69:1082-1095 (1982) for taxonomic treatment, and Conservation Genetics, pp. 1-14 (2011) for information on population genetics.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 December 2024].