360 ASTERACEAE. 



3. GRINDELIA Willd. 



Coarse perennial herbs or suffrutescent plants with 

 sessile, rigid mostly serrate leaves and rather large hemi- 

 spheric heads terminating corymbose branches. Invo- 

 lucral bracts with usually narrow herbaceous squarrose- 

 recurved tips. Flowers of both ray and disk many, 

 permanently yellow. Style-appendages lanceolate or 

 linear. Achenes short, thick, compressed or turgid, 

 truncate, glabrous. Pappus of 2-8 deciduous stout awns 

 or bristles. 



Stems herbaceous. 



Involucre 10-15 mm. wide; leaves 5-15 mm. 



wide. 1. G. camporum. 



Involucre 20-25 mm. wide; leaves 10-30 mm. 



wide. 2. G. robusta. 



Stems woody below; salt marsh species. 3. G. cuneifolia. 



1. G. camporum Greene. Herbaceous; stems white and shin- 

 ing, tufted from a perennial root, about 6 dm. high, glabrous, very 

 leafy up to the loosely corymbose heads, even the branches of the 

 corymb conspicuously leafy-bracted; basal leaves almost wanting; 

 stem leaves oblanceolate-spatulate, sessile and clasping, 5 cm. 

 long, saliently serrate-toothed; bracts of flowering branches nearly 

 entire, spreading; involucre 12-20 mm. wide, its bracts with long 

 linear recurved tips; ray-achenes obscurely 3-sided with 3 or more 

 pappus awns; disk-achenes compressed, obliquely biauriculate or 

 unidentate at the summit. 



Adobe mesas near Wiseburn. June-August. 



2. G. robusta Nutt. Stems herbaceous, stout, ascending from a 

 perennial root, about 5 dm. high; leaves broadly cordate-oblong, 

 obtuse, coarsely serrate, about 3.5 cm. long, often 2.5 cm. broad, 

 subcoriaceous, pubescent on the margins, otherwise glabrous; 

 heads very few, large, corymbosely disposed; outer bracts of in- 

 volucre rather leafy, the others narrow and squarrose; pappus awns 2. 



Open grounds about Los Angeles and toward the coast. First 

 collected at San Pedro by Nuttall. May-July. 



