ASTERACEAE. 361 



3. G. cuneifolia Nutt. Bushy and suffrutescent, 6-12 dm. high, 

 glabrous; leaves thickish and rather fleshy, 7-10 cm. long, cuneate- 

 spatulate to linear-oblong, entire or sparsely dentate, clasping at 

 the broad base; involucre about 12 mm. high, glutinous, its bracts 

 all with squarrose green tips; pappus awns usually several, com- 

 pressed barbellulate. 



Borders of salt marshes along the coast. September-November. 



4. GUTIERREZIA Lag. 



Herbaceous or suffrutescent, freely branching, some- 

 what reslniferous, nearly glabrous plants, with alternate 

 linear entire leaves, and numerous small heads corym- 

 bosely arranged at the ends of the branches. Involucral 

 bracts coriaceous, the outer successively shorter. Ray- 

 and disk-flowers yellow. Achenes angled or striate, 

 mostly silky. Pappus paleaceous. 



1. G. divergens Greene. Suffrutescent, 4-7 dm. high, glabrous 

 or merely granular-scaberulous, the panicled branches nearly 

 destitute of foliage at flowering time; involucres 6 mm. high, obo- 

 vate-turbinate, their obovate obtuse bracts well-imbricated and 

 with blunt green tips; disk-flowers 5-7; rays about 5; paleae of the 

 pappus 9-12, very unequal, narrow and acute. 



Common on the interior plains and foothills, especially common 

 on the fans at the base of the mountains. July-August. 



5. PENTACHAETA Nutt. 



Small slender nearly glabrous annuals, with alternate 

 linear entire leaves, and mostly small heads solitary or 

 somewhat clustered at the ends of more or less naked 

 branches. Involucre hemispheric or campanulate, its 

 bracts in 2 series, scarious-margined, appressed, mucro- 

 nate. Ray-flowers white, yellow or wanting. Disk- 

 flowers yellow, very slender. Style-appendages filiform- 

 subulate, hispid. Achenes pubescent. Pappus of 3-5 

 slender bristles. 



1. P. aurea Nutt. Diffusely branching, 1-3 dm. high, some- 

 what villous-pubescent; heads about 10-15 mm. broad, many- 

 flowered; flowers all yellow; rays obtuse, 20 or more; involucral 

 bracts broadly lanceolate, setaceously acuminate, with green middle 

 portion and scarious margins; achenes somewhat villous-pubescent; 

 pappus bristles 5-8. 



Arroyo Seco, Davidson. Frequent in the Santa Ana Mountains 

 and common throughout the coast slope of San Diego County. 



2. P. lyoni Gray. Hirsute, at least the margins of the plane 

 linear or spatulate-linear leaves, 1-1.5 dm. high, with the sparing 

 ascending branches leafy up to the head or short peduncle; in- 



