Aster Tribe 393 



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. 



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

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

 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 

 involucre 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. 



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, glutin- 

 ous, its bracts all with squarrose green tips; pappus awns usually 

 several, compressed barbellulate. 



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



