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Cleveland National Forest. Along Nate Harrison Grade approximately 2 miles west of Palomar Mountain State Park.

Whitewater Preserve. Dry wash, ca. 200 meters southwest of southern-most parking area at campground.

Parking lot of Hiking trail of Glacier Lodge

Punta Banda SW of Ensenada, near Los Arbolitos, 1.6 mi S of La Joya

Hillside above Placerville.

Cleveland National Forest, S6 highway near bend in road. Approximately 4 miles north of highway 76.

Found on trail in canyon off of Waring Road. Sea level.

Ronald W. Caspers Wilderness Park, West Ridge trail, ca. 700 meters north of junction with Loskorn Trail.

Camp Pendleton: southwestern corner of Base north of the Santa Margarita River mouth; Training Area Beach F, just south of the LCAC facility; along the beach area and in a wetland at the base of a coastal bluff

Apache canyon road, in wash. Off of HWY 33.

North west of Rosamond, 150 meters north east of intersection of Tehachapi Willow Springs Road and 110th Street West

Ronald W. Caspers Regional Park, Bell Canyon Trail, ca. 50 meters south of junction with Star Rise Trail.

No. side of Big Bear Lake, San Bernardino Mts.

Porcupine Mtns State Park Camp Grounds.

Sugarloaf Peak, San Bernardino Mts.

Mazourka cny rd/edge of Badger Flat

San Fermin Canon.

El Valle. Remote southeastern region of Santa Margarita Ecological Reserve (SDSU).

37.1 km south south east of Miles City. In and along drainage 1.89 km south east of Tounge River, just east of Tounge River Road.

Across the street from Mission Trails Dam parking lot, up the trail to Kwaay Paay peak. One-third of the way up, on the east side of the trail.

Steele/Burnand Anza-Borrego Desert Research Center, wash ca. 50 meters east of facility.

10.6 miles west of Sonora Junction on sonora Pass road.

10 miles southeast of Camp Verde.

Porcupine Mts. State Park.

East side of Morro Bay

Santa Catalina Island, northeast-facing slope above Pebbly Beach Drive, between Avalon Bay and Abalone Point.

Near 67th and Amherst.

UTM-Easting: 469005.19; UTM-Northing: 3690461. Training Area: INDIA. LTETM PLOT# 64.

Collected on S side of Federal Blvd. below KOGO towers.

Pinon Hills, Puma Canyon Ecological Reserve, Puma Canyon (Previously Sand Canyon), Pinon Hills Quad 7.5 m

Marine Corps Base Camp Pendleton, at “Mass III Ponds” area. Formerly a sewage treatment facility that was decommissioned in the late 1900s and underwent some form of habitat restoration. Unknown if Centromadia population at this location is naturally-occu

On the road from Jacumba to Ocotillo, 1.6 miles W from the road to Calexico.

Mtns. Point San Fermin, B. C.

On northeast side of Heart Butte Cutoff (Road), 9.8 miles southeast of US 2 junction on dark gray friable shaley clay exposure (at telephone line road crossing).

Vagadra; entrance od Osoabukete Cave; Plot 5

Point Loma Naval Facility, SPAWAR. West of Woodward Rd. and about 150 m north of intersection with Propagation Rd.

Colonet Mesa, ca. 18 km south-southwest of Colonet, reddish sandstone bluffs on mesa.

3.4 miles north of Bahia de los angeles on road to Chapala.

Santa Ana Mountains. Main Divide Truck Trail, ca. 7.7 miles from Hwy 74 (Ortega Highway), along Forest Route 3S04. Roadside.

At Cabrillo National Monument, 20 feet NW of lower maintenance yard. Open sandy slope facing the Northwest.

Anza Borrego Desert State Park, Pinyon Mountain region, ca. 500 meters south of Pinyon Mountain base, ca. 9 miles east of S-2 along dirt road.

Along east side of trail leading to Iron Mountain peak, about 1.3 miles east from junction of Poway Road and Highway 67 in Ramona. About 0.6 miles north of Iron Mountain peak.

Eastern Municipal Water District’s Little Valley site, southeast of Hemet, near eastern terminus of Lake Road, south of Stetson Avenue.

10.3 miles south of Hwy 74 in Hemet, on Hwy 79.

Del Venturi Road, approx. 2 miles west of junction with Mission Rd at Fort Hunter Liggett.

Ronald W. Caspers Wilderness Park. Nature Loop Trail, west trail, ca. 100 meters north of parking area.

Behind Challenger Middle School near Mire Mesa Blvd.

4.56km West north west of intersection of Highway 15 and 138

San Clemente Island. Northern tip of island, west of Northwest Harbor, ca. 100 feet from intertidal zone.

2.2 miles north of Roosevelt Dam.