396 COMPOSITiE. 



long: heads in ample cymose pauicles at the ends of long willowy leafy 

 branches. — On banks of streams, from Butte Co. southward. 



4. IJ. pilulnris, DC. Prodr. v. 407 (1836). Low, slender, the depressed 

 or prostrate diffusely branching stems 1 — 'iVg ft. long; branchlets 

 angular: leaves seldom % in. long, cuneate-obovate, angular- toothed or 

 subentire, heads mostly solitary in the leaf-axils and at the ends of the 

 broom-like fastigiate branchlets : involucral bracts acutish, fringed 

 toward the tips. — Sandy soils along the seaboard. 



5. B. coiisaiigninea, DC. 1. c. Compactly branching evergreen 8—12 

 ft. high: branchlets green, angular from the leaf-bases: leaves sub- 

 coriaceous, glutinous, 1 in. long and less, cuneate-obovate, coarsely 

 toothed: heads sessile singly or in pairs or threes in the leaf-axils: bracts 

 of involucre oblong-linear, obtuse, with subscarious fringed margins. — 

 Hillsides and banks of streams everywhere; occasional hybrids occur 

 between this and the preceding at San Francisco. Oct. —Dec. 



Suborder 3. Gnaphaliace^e. 



Plants mostly white with floccose wool, the herbage apt to be more or 

 less pleasantly or unpleasantly scented. Heads discoid: bracts of invo- 

 lucre various, often scarious and white or yellowish. Anthers caudate. 

 Style-branches of perfect flowers blunt, unappendaged, the stigmatic 

 lines running almost to the summit, which is sometimes papillose or 

 penicillate. Pappus finely capillary or none. 



Hints of the <)ieiiera. 



* Involucral bracts many; receptacle not chaffy. 



Involucre herbaceous; achenes large, naked, glandular ------ 42 



Involucre ecarious; Hchenes small; 



Plants unisexual -----------33, 34 



Male and female fl. in the same head -------35 



Involucre dry, but hardly scarious -----------32 



* * Involucral bracts few or none: receptacle chaffy. 



Fructiferous chaff or bract quite enclosing its achene; 



Achenes gibbous --. ----40 



Achenes straight or curved; 



Receptacle columnar ----------- 41 



Receptacle globular or ovoid ----------39 



Fructiferous bract scarcely enclosing its achene; 

 Receptacle columnar; 



Pappus none ---------- 38 



Pappus to sterile flowers only -------37 



Receptacle convex; pappus present -------- 36 



