(Brandegee) D.W. Taylor & D.J. Keil
Identity
Unique IDELEMENT_GLOBAL.2.129360
Element CodePMLIL0G050
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassMonocotyledoneae
OrderAsparagales
FamilyAsparagaceae
GenusHooveria
SynonymsChlorogalum purpureumBrandeg.
Concept ReferenceKartesz, 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
Review Date2011-09-12
Change Date2011-09-12
Edition Date2011-09-14
Edition AuthorsD. Gries, rev. R. Bittman (7/98), rev. M.J. Russo (5/11), rev. A. Tomaino (2011)
Threat ImpactVery high - medium
Range Extent<100 square km (less than about 40 square miles)
Number of Occurrences6 - 20
Rank ReasonsEndemic to California, Chlorogalum purpureum known from approximately 15 extant occurrences. The two occurrences of C. purpureum var. reductum appear to be under greater threat than those of C. purpureum var. purpureum. Threats include cattle grazing on the Los Padres National Forest, illegal trespass by motorcycles, displacement by non-native annual grasses, and wildfire.
Range Extent CommentsFrom USFWS (2008): Chlorogalum purpureum var. purpureum is endemic to the Santa Lucia Range of Monterey and San Luis Obispo counties, California, and is known from two properties: several localities on Fort Hunter Liggett, southern Monterey County; and one locality on Camp Roberts in northern San Luis Obispo County. A distance of approximately 31 km (19 miles) separates the locality on Camp Roberts from the nearest locality on Fort Hunter Liggett (Holland 2004). Chlorogalum purpureum var. reductum is endemic to the La Panza Range in central San Luis Obispo County. The taxon is known only from a small geographic area. The main population is approximately 0.8 km (0.5 mile) east of the southern end of Camatta Canyon. It occurs approximately 61 km (38 miles) southeast of the population of C. purpureum var. purpureum on Camp Roberts and 92 km (57 miles) southeast of the nearest site on Fort Hunter Liggett. One site for C. purpureum var. reductum is at the intersection of State Highway 58 and Red Hill Road which comprises 3 ha (7.5 ac) of land south of the highway and probably less north of the highway. Most of this site is in the Los Padres National Forest; the site continues on either side of State Highway 58 within a right-of-way of the California Department of Transportation, and then northward and also likely southward onto private lands. The second site is approximately 6.5 km (4 miles) south of the first and comprises approximately 0.1 ha (0.25 ac) of private land.
Occurrences CommentsC. purpureum var. purpureum is known from 13 occurrences in Monterey County (Fort Hunter Liggett Military Reservation) and 1 occurrence San Luis Obispo County (Camp Roberts Military Reservation); C. purpureum var. reductum is known from 2 occurrences in San Luis Obispo County (EO data in the NatureServe central database as of July 2011).
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Threat Impact CommentsChlorogalum purpureum var. reductum is threatened by cattle grazing, illegal trespass by motorcycles, displacement by non-native annual grasses, and wildfire (USFWS 2008). Chlorogalum purpureum var. purpureum is also threatened by non-native annual grasses, and wildfire; however, grazing and military activites are not currently impacting Chlorogalum purpureum var. purpureum (USFWS 2008). Other threats include habitat fragmentation, habitat conversion, foot traffic, and road maintenance(CNPS 2011).
From USFWS (2008): Non-native annual grasses and other invasive plant species continue to be a threat to both taxa. Invasive plant species may displace the Chlorogalum purpureum by outcompeting and monopolizing limited resources (growing space, sunlight, soil nutrients, water), with the potential effects of preventing growth and recruitment, and may also alter characteristics of the fire regime, such as frequency, intensity, and seasonality of fires. Because of the clumped and limited distribution of the plants in a semiarid environment, a wildfire could destroy a substantial portion of the population. The frequency of fires in California is increasing (Syphard et al. 2007), and fires at certain times of the year have the ability to prevent annual reproductive success of Chlorogalum purpureum plants which are susceptible to damage by fire when the living structures, including the seeds, are above ground or near the soil surface. However, fires at certain times of the year may potentially benefit the plants by removing other competitive plants.