77 
Crossosoma 34(2), Fall-Winter 2008 
Ehrharta longiflora Sm. (POACEAE) - Los Angeles County, Puente Hills, 
City of Hacienda Heights. Southern California Edison powerline corridor near 
Skyline Dr. and east of Hacienda Blvd., USGS 7.5’ La Habra Quad (33 0 58’N, 
1 17°57 , 30”W; T2S, R10W, NE/4 S30), elev. 320 m (1050 ft.), 8 May 2008, Scott 
D. White & Justin M. Wood 11943 (RSA). 
Previous knowledge. Ehrharta longiflora (longflowered veldtgrass) is an invasive 
annual native to southern Africa. The first California collections were made in 
San Diego Co. in the early 1990s and in Riverside Co. in 2001. Tom Chester 
provides photographs; background on local invasions and eradication efforts; 
and an identification guide online at http://tchester.org/plants/analysis/ehrharta/ 
longiflora.html (site accessed 1 8 Apr 2009). 
Significance. First record for Los Angeles County, and about 90 km north of the 
nearest known occurrence, at Santa Margarita Ecological Preserve, Riverside Co. 
This occurrence was discovered and identified by Ed Kentner. Erharta longiflora 
was abundant in localized patches along Skyline Dr. between Hacienda Blvd. and 
Punta del Este Dr. Our collection was along a short access road to a powerline 
tower, just north of Skyline Dr. Most of the plants had dropped their seeds and 
turned brown, but intact green specimens were common on north exposures along 
the road. It was most common on roadsides and open places, partially beneath 
the canopies of native oaks and ornamental eucalyptus woodland, and also 
was spreading into the adjacent shrublands. The plants were robust, with stems 
approaching about 2 m tall. Based on the many plants which had already dropped 
seeds, it must have produced a copious seed crop, and it is likely to disperse 
farther via wind, vehicles, or animals. 
Euphorbia graminea Jacq. (EUPHORBIACEAE) - Los Angeles County, San 
Gabriel Valley, City of Monrovia, private residence on El Nido Ave., USGS 7.5’ 
Mt. Wilson Quad (34°09 , 13” , N, 118°00 , 48 ,, W; TIN, R11W, SE/4 S22), elev. 
171m (560 ft.), 3 Jan 2009, Justin M. Wood 281 (RSA), detennined by Victor 
Steinmann. 
Previous Knowledge. Euphorbia graminea (grassleaf spurge) is a facultative 
annual or perennial herb, native from northern Mexico to Colombia and 
Venezuela. It has spread widely from its native range to numerous locations, 
including Florida, Louisiana, and very recently, California (Victor Steinmann, 
pers. comm. ). To date, the only two California collections we are aware of were 
made in 2004 and 2005, in San Diego County (Consortium of California Herbaria, 
http://ucjeps.berkeley.edu/consortium/ , site accessed 31 May 2009). 
