GENERA AND SPECIES. 
Phyllaries in several rows; stigmas flattened, 
papillose de a 
Phyllaries in 1 row; stigmas feanesieds fiom: 
tufted .. ne 
Pappus- fieistles denticulate, ihe pitt aaa 
points 
Ray-flowers in two or more rows, has. 
Achenes produced into a slender beak me 
Achenes compressed, not beaked; pappus-bristles 
unequal, in more than two rows , i 
b. Pappus of capillary bristles and scales. 
Ray-flowers and phyllaries in 2 or more 
rows. 
Fertile achenes with several rows of capillary bristles 
and a few lanceolate scales; sterile achenes with 
bristles only; ray white . 
Fertile achenes compressed, with pees RAE 
sterile achenes with scales .. sas abh bs 
c. Pappus of lanceolate-subulate flat segments. 
Achenes angular; ray-flowers in one row; bracts 
between the flowers.. 
d. Pappus of rigid spines pone also Glossogyne y 
Achenes angular; ray-flowers in one row; acl 
in 2 rows . 
e. Pappus very short or 
flowers in 1 row. 
wanting. 
Ray. 
Achenes compressed, cylindrically produced, glandu- 
lar hairy; phyllaries in several rows. Ray blue 
Achenes various, truncated; phyllaries in 2 rows, 
nearly equal, margins membranous ; 
Achenes oblong, papillose; phyllaries in 1 row; 
bracts between the flowers. Ray blue ... ode 
Achenes oblong, glabrous, ribbed on the back and 
sides, phyllaries in several rows. Ray yellow... 
m1. Flowers all tubular, or the marginal flowers 
not conspicuously rayed, in distinct, not 
compound heads. Female flowers 
usually outside, in one or more rows, 
and more slender than the inner bisexual 
ones, 
a. Leaves radical or tufted, phyllaries in two 
rows; anthers obtuse at the base. 
Pappus wanting; achenes ovate-angular, glabrous ... 
10% 
Aster 
Senecio 
Pterigeron 
Podocoma 
Vittadinia 
Dimorphocoma. 
Minuria 
Achnophora 
Calotis. 
Lagenophora 
Brachyecome 
Erodiophyllum 
Cymbonotus 
Solenogyne 
