SUNFiOWER FAMILY. 555 



rarely puberulent; darker green than in the next species; radical 

 leaves oblong or even obovate, narrowed to a rather long, often 

 winged petiole, serrate or coarsely and saliently toothed, 2 to 8 in. 

 long, the cauline similar or sessile; heads naked; involucre f to 1 in. 

 broad, very gummy, its lanceolate bracts with subulate or filiform 

 squarrose tips; achenes with 2 awns or in the periphery of the disk 

 with 3 (2 at the exterior angle and closely approximate). — Valley 

 lands about San Francisco Bay. Peduncles commonly less leafy 

 than in the preceding variety. Heads typically naked, but frequently 

 with a few loose outer and slightly larger bracts simulating the folia- 

 ceous bracts in the var. patens; or again, we may have still more 

 pronounced intermediate forms closely connecting these two varieties, 

 which in their typical states are very clearly marked. On the other 

 hand, the var. Davyi presents perfectly naked (non-foliaceous) heads 

 in such diversity tliat a complete chain may be had showing every 

 gradation to 6. camporum. G. robusta and its varieties in their 

 extreme forms are more unlike each other than are the species G. 

 camporum and G. rubricaulis. This is an excellent illustration of 

 the principle that, in a highly variable group, varieties of a species 

 may be more unlike than a species is unlike another species. 



2. G. camporum Greene. Plants commonly IJ or 2 ft. high, 

 glabrous, the foliage light green; leaves mostly oblong, serrulate or 

 denticulate, 1 to 2 in. long; heads paniculate-corymbose, never soli- 

 tary; involucre urnshaped-campanulate, the short outer bracts linear- 

 subulate, squarrose-deflexed, the inner lanceolate-subulate, with 

 spreading tips or erect. 



Abundant on the plains of the San Joaquin and Sacramento 

 Valleys and the dry inner Coast Kanges; also (apparently) Knoxville 

 grade to Lower Lake. June-Aug. or continuing into the winter. 

 Stems usually white, in no. 1 darker or reddish. 



G. PKOCERA Greene. Five ft. high; rays very short. — Flooded 

 lands of the Lower San Joaquin; Greene also refers to this no. 2426, 

 Bolaiider, of the State Survey, probably collected in marshes about 

 San Francisco Bay, the citation, "Oakland Hills," in the State 

 Survey Field Book doubtless an error. 



3. G. rubricaulis DC. Stems commonly 2 ft. high, tufted, 

 reddish or brownish, ending in a small -corymb of about 3 or 4 heads 

 or one-headed; herbage scantily soft-pubescent when j'oung, in age 

 mostly glabrous; leaves 2 to 5J in. long, oblong, serrate and sessile 

 especially toward the apex, or disposed to be entire, attenuate into a 

 petiole as long as the blade, the cauline similar or sessile; heads small, 

 i in. in diameter (not including the rays); involucral scales lanceolate, 

 not squarrose, very slightly or not at all glutinous, sometimes 

 tomentose. 



Ridges and hillsides of the Coast Ranges, in openly wooded coun- 

 try: near Mt. Tamalpais, Setchell; Sonoma, Bioletti; St. Helena, 

 Greene; Howell Mountain, Jepson. 



i: G. cuneifolia Nutt. Stems 2 to ^ ft. high (commonly with a 



