DICOTYLEDONOUS PLANTS 169 



is in bloom. They are spatnlate, toothed, white-woolly; the upper 

 are triangular-ovate and closely sessile. Western and central Cali- 

 fornia. Variable. 



IV. CHRYSOP'SIS, Golden Aster 



Perennial herbs with many stems from the root, very leafy, 

 with alternate, sessile leaves. Heads either tvith or ivithout 

 rays, solitary or in corymbs. Bracts of the involucre in 

 several series, either with or without papery margins, and 

 without green tips. Flowers yellow. Akenes compressed, 

 hairy. Papj^us usually double ; the inner a roic of long^ rough, 

 rusty bristles ; the outer a row of short, narrow, chaffy scales 

 or bristles. 



a. C. sessiliflo'ra Nutt. Hairy or soft-woolly, with stems a foot 

 or so high. Heads about an inch in diameter, with rays. There 

 are several varieties of this which are considered species by some 

 botanists. Common, and in bloom all the year. 



h. C. Orega'na Gray. Stems spreading, branched above, rough- 

 hairy. Heads numerous without rays, the involucre almost equal- 

 ing the flowers. The outer pappus consists of slender bristles 

 rather than chaffy scales. This is found in dry stream-beds through 

 middle California to Washington. 



V. APLOPAP'PUS 



Herbs or shrubs, with numerous heads of yellow flowers, 

 the outer ojies having rays (with one or two exceptions). 

 Bracts of the iiivolucre in several series. Akenes narrow, with 

 pappus in one row. E-eceptacle honeycombed. 



a. A. linearifo'lius DC. Shrubby, much branched, forming a 

 bushy plant. Leaves an inch or less long, sometimes in clusters, viscid, 

 and covered ivith resinous dots. Heads solitary at the ends of the 

 numerous branchlets, an inch or more in diameter, with the ray 

 flowers irregularly placed, so that the head has an untidy appear- 

 ance ; the bracts of the involucre are also less regular than in other 

 species. Akenes silvery- hairy, with white pappus that falls readily. 

 On dry hills in the Coast Mountains. 



h. A, ericoi'des Hook. & Arn. Shrubby, much branched, with low, 

 spreading branches. Heads small, numerous, with few yellow flowers 

 and but few rays. Leaves very numerous, small, terete, closely clus- 

 tered into small, somewhat fan-shaped bunches, which rather densely clothe 



