Home/Species/ Sticky Geraea

Geraea viscida

(Gray) Blake

Sticky Geraea

G3Vulnerable Found in 1 roadless area NatureServe Explorer →

G3VulnerableGlobal Rank

High - mediumThreat Impact

Identity

Unique IDELEMENT_GLOBAL.2.154070

Element CodePDAST42020

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicoccurs (regularly, as a native taxon) in multiple nations

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderAsterales

FamilyAsteraceae

GenusGeraea

Concept Reference

Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

Conservation Status

Rank Method Rank calculation - Biotics v2

Review Date2020-08-20

Change Date2001-05-01

Edition Date2020-08-20

Edition AuthorsStoner, N. (1993), rev. C. Thurman (2000), rev. L. Morse (2001), rev. A. Tomaino (2020)

Threat ImpactHigh - medium

Range Extent5000-20,000 square km (about 2000-8000 square miles)

Number of Occurrences81 - 300

Rank Reasons

Geraea viscida is known from San Diego County, California and northwestern Baja California, Mexico. Threats are high in California and include development, grazing, recreation, and non-native plants.

Range Extent Comments

Geraea viscida is known from southern California (San Diego county) to northwestern Baja California, Mexico (Baldwin et al. 2012).

Occurrences Comments

There are approximately 100 occurrences in California however, 20 of those have not been observed in over 20 years (CNDDB 2020). In Baja California, there are approximately 120 specimen records, 17 of which were collected in the last 20 years (Flora of Baja California 2020). There are many observations of this species documented by photos on iNaturalist.org (2020) in Mexico and the United States. These observations should be reviewed to confirm their identification, location, and to exclude cultivated specimens.

Threat Impact Comments

Threat are high in California and uncertain in Baja California (R. Bittman, pers. comm., 2017). Threats include solar energy development, other development, off-road vehicles, road widening and maintenance, grazing, trampling, and non-native plants (CNPS 2020; CNDDB 2017).

Ecology & Habitat

Habitat

This species occurs in sunny openings in chaparral habitat at 450 to 1,700 meters of elevation (Baldwin et al. 2012).

Terrestrial Habitats

Shrubland/chaparralGrassland/herbaceous

Other Nations (1)

United StatesN2

Province	Rank	Native
California	S2	Yes

Threat Assessments

Threat	Scope	Severity	Timing
1 - Residential & commercial development	Large - restricted	Moderate or 11-30% pop. decline	—
2 - Agriculture & aquaculture	Restricted (11-30%)	Moderate or 11-30% pop. decline	—
2.3 - Livestock farming & ranching	Restricted (11-30%)	Moderate or 11-30% pop. decline	—
3 - Energy production & mining	Large - restricted	Moderate or 11-30% pop. decline	—
3.3 - Renewable energy	Large - restricted	Moderate or 11-30% pop. decline	—
4 - Transportation & service corridors	Unknown	Slight or 1-10% pop. decline	—
6 - Human intrusions & disturbance	Small (1-10%)	Slight or 1-10% pop. decline	—
6.1 - Recreational activities	Small (1-10%)	Slight or 1-10% pop. decline	—
8 - Invasive & other problematic species, genes & diseases	Restricted (11-30%)	Moderate or 11-30% pop. decline	—
8.1 - Invasive non-native/alien species/diseases	Restricted (11-30%)	Moderate or 11-30% pop. decline	—

Plant Characteristics

DurationPERENNIAL

Economic Value (Genus)No

Roadless Areas (1)

California (1)

Area	Forest	Acres
Pine Creek	Cleveland National Forest	503

References (9)

Baldwin, B. G., D. H. Goldman, D. J. Keil, R. Patterson, T. J. Rosatti, and D. H. Wilken, eds. 2012. The Jepson manual: vascular plants of California. 2nd edition. University of California Press, Berkeley, CA. 1568 pp.
Bittman, Roxanne. Personal Communication. Botanist, California Natural Diversity Database, Sacramento, Calif.
California Native Plant Society (CNPS). 2020. Inventory of Rare and Endangered Plants (online edition, v8-03 0.39). California Native Plant Society, Sacramento, CA. Online. Available: http://www.rareplants.cnps.org (accessed 2020).
California Natural Diversity Database (CNDDB). 2020. RareFind Version 5.2.14. California Department of Fish and Game, Sacramento.
Flora of North America Editorial Committee (FNA). 2006c. Flora of North America north of Mexico. Vol. 21. Magnoliophyta: Asteridae, part 8: Asteraceae, part 3. Oxford Univ. Press, New York. xxii + 616 pp.
iNaturalist. 2020. Online. Available: http://www.inaturalist.org (accessed 2020).
Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Munz, P.A., with D.D. Keck. 1959. A California flora. Univ. California Press, Berkeley. 1681 pp.
The Flora of Baja California. 2020. San Diego Natural History Museum. Online. Available: http://bajaflora.org/.

Geraea viscida

Habitat

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