41 
Bracts rounded and pure white or pale rose at the tips ;~ 
leaves very woolly. J 
Antenna Tia. 
Bracts not white and rounded at the tips. 
Heads pink or purple. 
( Bracts nearly all equal in length, with a few small 
( outer ones ; pappus not feathery. } 
| Tussila’go Petasi'tes utterbur. 
' \Bracts of different lengths, overlapping each other ;~ 
| pappus feathery. J 
Saussu rea alpina. 
~Heads yellow (at least in the central part). 
Plant whitish, felted with cottony wool, the small 
flower-heads crowded together, almost or | 
quite without separate stalks. (This includes 
also /z/ago, which has the outermost florets 
mixed with scales. See for both genera under) J 
L Gnapha'lium. 
Plant green (smooth or hairy); heads, or some of 
them, on distinct stalks. 
All the florets regularly 5-cleft; plant without 
f hairs. : 
L As'ter. 
Outermost florets strap-shaped, or narrow and 
threadlike ; plant usually hairy. 
Outer bracts with widish, more or less recurved, 
f points; plant tall, aromatic. } 
Inula Cony’za. Ploughman’s Spikenard. 
~Bracts all narrow, with fine points; plant BE 
not aromatic. 
Erig’eron.? 
CRUCIFP’ERA. 
Some of the species cannot be certainly distin- 
guished without the fruit. Often, however, the lower 
flowers will be found in fruit, while the upper are 
still in bloom, and, even before the petals fall, it can 
generally be seen whether the ovary is going to become 
afshort fruit, or a long, narrow pod. 
( Flowers yellow or orange. GROUP I. 
Flowers white, cream, pink, or purple (or petals 
absent). GROUP II. 
