528 composite:. 



not joined into a cup, enclosing 3 flowers only; achenes all gibbously 

 obovate, those of the rays 3 to 5. — Marin Co. 



3. M. dissitiflora (Nutt.) T. & G. Very slender, 1 to 2 ft. high, 

 simple or loosely branching, moderately or scarcely at all viscid, at 

 least below; flowers sulphur-yellow; heads 3 (or barely 4) lines high, 

 scattered or loosely paniculate; cup of receptacle ovoid but not closed, 

 containing few disk-flowers; rays 5 to 8, IJ to 2 lines long; achenes 

 short and broad (1 to 2 lines long). 



Stream banks, open bushy places or wooded slopes in the moun- 

 tains: North Coast Ranges to the Santa Cruz Mountains (where very 

 slender forms pass into coarser forms, as much as 3J ft. high, by 

 every gradation). 



4. M. madioides (Nutt.) Greene. Woodland Madia. Peren- 

 nial (or sometimes biennial ?); stem or stems from the base simple, 

 bearing a terminal corymbose panicle of long slender and nearly 

 naked branches, IJ to 2| ft. high; some or most of the leaves oppo- 

 site, linear, a few varying to lanceolate, 4 in. long or less, entire or 

 sparingly denticulate; bracts of the involucre 8 to 12, with short 

 tips; rays acutely 3-lobed, 3 or 4 lines long; only ray-achenes fertile, 

 these much flattened, curved and somewhat obovate, the surface 

 covered with minute muriculations and the sides with many stria?; 

 pappus of very short fimbriate or hairy palese. — (M. Nuttallii Gray.) 



Wooded country near the coast from Monterey to Bolinas Eidge, 

 Setchell, and northward. June. 



5. M. radiata Kellogg. Stem stout, 2 to 3 ft. high; hirsute and 

 viscid; larger leaves broadly lanceolate, denticulate; bracts of the 

 involucre 10 to 20, with short tips; rays light yellow, J to f in. long, 

 obtusely 3-toothed; chaffy bracts between ray and disk united; disk- 

 flowers very numerous on a nearly flat glabrous receptacle, fertile, 

 except the central ones, somewhat clavate and 4-angular; ray-achenes 

 narrowly obovate-falcate, flat, tipped with a minute reflexed beak. 



Near the mouth of the San Joaquin Eiver. 



6. M. elegans Don. Common Madia. Stem 1 to 3 ft. high; 

 lower leaves linear, 3 to 8 in. long, short-hirsute, often densely so; 

 upper leaves much reduced in size, linear-lanceolate; herbage, par- 

 ticularly above, viscid with short gland-tipped hairs, the involucres 

 and peduncles more or less hirsute with white hairs; heads many in a 

 corymbose panicle; receptacle convex, fimbrillate-hirsute; rays 12 to 

 15, J to nearly 1 in. long, yellow or with a red spot at base; achenes 

 flattish, light brown or blackish, smooth. 



Variable and abundant species found on dry hillsides and in valley 

 fields. July-Oct. The var. dbnsifolia (M. densifolia Greene) has 

 the leaves crowded toward the base or tufted. 



46. HARPyECARPUS Nutt. 

 Small slender viscid-glandular annual with sweet-scented herbage 

 and narrow entire mostly alternate leaves. Head small, few-flowered, 

 borne on naked filiform peduncles. Flowers yellow; corolla glabrous. 



