PL. I NTS OF LOS ANGELES COUNTY. 15 



Dicorla, T. & O. 



canesccns, T. & G. River wash, East Los Angeles. 

 Hymenoclea, T. & Q. 



Salsola, T. & G. Mohave Desert. 

 Ambrosia, Tourn. Ragweed. 



psilostachya, DC. Common weed, roadsides and wastes. 

 Franseria, Cav. 



acanthicarpa, Hook. Sandy soil around Los Angeles. 



bipinnatifida, Nutt. Common on the seashore. 



dumosa, Gray. Mohave Desert. 



tenuifolia, Gray. At Hollywood, abundant. 

 Xanthium, Tourn. Cockle-bur. 



Canadense, Mill. Common in sandy wastes. 



spinosum, Linn. (Spiny Cockle-bur.) Along streets and wastes. 

 Balsamorrhiza, Hook. 



deltoidea, Nutt. Slopes near Gorman Station. 

 Qymnolomia, HBK. 



multiflora, B & H. Occasional, Los Angeles River sands; Santa Monica. 

 Helianthus, Linn. Sunflower. 



annuus, Linn. Common on the plains. 



gracilentus, Gray. Newhall, rare. 



Oliveri, Gray. Cienega; East Los Angeles. 

 Encelia, Adans. 



Californica, Nutt. Dry hills in Coast Ranges, very common. 



eriocephala, Gray. Abundant in the Larrea belt. 

 Verbesina, Linn. 



encelioides, B. & H. El Monte; Los Angeles River banks; local. 

 Bidens, Tourn. Bur-Marigold. 



chrysanthemoides, Michx. Along streams and marshes. 



pilosa, Linn. Along streets. 

 Leptosyne, DC. 



Douglasii, DC. Common on foothills and higher plains. 



gigantea, Kell. Catalina Island; Santa Monica Coast 

 Madia, Molina. Tar- Weed. 



dissitiflora, T. & G. Santa Monica. 



elegans, Don. Roadsides west of Fairmont. 



filipes, Gray. Open grounds; Newhall; Glendale; Wilson's Peak. 



sativa. Molina. Common on plains and lower hills. 

 Hemizonia, DC. Tar-weed. 



fasciculata, T. & G., var. ramosissima, Gray. Very common. 



pungens, T. & G. Dry hillsides, common. 



Parryi, Greene. Brackish flats from Los Angeles to Ballona. 



Streetsii, Gray. Catalina Island. 



tenella, Gray. Sunny slopes of the Coast Ranges. 

 **virgata, Gray. Los Angeles. (Bot. Cal.) 



Wrightii, Gray. Catalina Island. 

 Achyrachsna, Schauer. 



mollis, Schauer. In grain fields from Los Angeles to the coast. 

 Lagophylla, Nutt. 



ramosissima, Nutt. Frequent on dry hillsides. 

 Layia, H. & A. 



heterotricha, H. & A. Hills near Gorman Station. 



glandulosa, H. & A. Sandy grounds on foothill streams, 

 var. rosea, Gray. Sycamore Grove. 



platyglossa, Gray. (Tidy-tips.) Common on open hills, 

 var. breviseta, Gray. Los Angeles. 

 Jaumea, Pers. 



carnosa, Gray. Salt marshes at the sea coast. 

 Venegasia, DC. 



carpesioides, DC. Canons of the Coast Range; not common. 



