226 CICHOEIACE.&. 



+- -t— Heads large, and ligules elongated. 



2. A. grandiflora (Nutt.), Greene. Bather more lanate than the 

 last, often as large: leaves more deeply and constantly pinnatifld, the 

 terminal undivided part oblanceolate, obtuse: ligules light yellow, elon- 

 gated, spreading, the expanded head 2 — 3 in. broad: aohenes about 3 

 lines long, the beak 10 lines. — Plains of the eastern part of Solano Co. 

 and far northward; not in the Bay region proper. May. 



3. A. intermedia, Greene. Size of the last, nearly, pale green and 

 •glaucescent, but with some lanate pubescence when young: leaves with 

 a linear rachis, many remote narrowly linear pinnate segments and a 

 long linear-acuminate terminal lobe: expanded ligules forming a head 

 2 in. broad, fl. pale yellow: achenes 2— 2% lines long, very sharply 

 carinate-ribbed, the ribs along their bases closely beset with short stiff 

 setulose hairs; beak 8 — 10 lines long.— Mt. Diablo, near the summit, aDd 

 elsewhere, at considerable elevations of the inner ranges. 



i. A. hirsnta (Hook.), Greene. Hirsute-pubescent, not rarely caules- 

 cent and the depressed or ascending stem 6 in. high: leaves from narrowly 

 spatulate and merely toothed or lyrate-pinnatifid, to pinnately parted 

 into linear lobes: scapes or peduncles slender, 1 — 1J^ ft. high, reddish; 

 the elongated bright yellow ligules also fading reddish: achenes slender- 

 fusiform, 1% lines long or more, the beak only about twice as long; pappus 

 usually dull or yellowish white. — Only on open grassy slopes near the 

 Bay and seaooast. May — Nov. 



5. A. apargioides (Less.), Greene. Very near the last, but every 

 way much smaller, the leaves more remotely and slenderly pinnatifld : 

 heads only ^ in. high: beak not longer than the body of the achene. — Sand 

 hills of San Francisco; flowering almost throughout the year. 



* * Perennials; achenes abruptly beaked from a truncate summit. 



6. A. retrorsa (Benth.), Greene. Hoary with a woolly pubescence: 

 leaves pinnately parted into linear-lanceolate usually long retrorse lobes, 

 the terminal one long and narrow, all callous- tipped: ligules long, pale 

 salmon-color: achenes truncate, 3 lines long, the filiform beak nearly an 

 inch. — Higher elevations of all the coast mountains. June, July. 



* * * Annuals; manifestly caulescent. 



7. A. heterophylla (Nutt.), Greene. Slender, seldom 1 ft. high, 

 more or less villous or hirsute: leaves spatulate to oblanceolate, toothed 

 irregularly, or entire: heads 3^ — % in. high; ligules short and inconspic- 

 uous: achenes about 2 lines long, with beak of about 3 lines; inner 

 achenes mostly with obsolete ribs and not filled to the summit by the seed; 

 outer ones extremely variable, normally with ribs developed into broad 

 undulate wings, otherwise merely ribbed and hirsute, or again, inflated 

 to the subcylindric and the ribs not visible. — Very common, and dispersed 

 widely beyond our limits. April — May. 



