COMPOSITii (composite FAMILY.) 



411 



Akenes compressed or angular-cylindrical - Hyoseris 83 



Akenes teretish ; pappus of outer cup-like, of 



inner awned pales Hedypnois 84 

 Pappus bristly-hairy, not plumose or 0. 



Akenes bald, awl-shaped - - - - Rhagadiolus 88 

 Akenes all or marginal ones with a short crown. 



Akenes 4-angled - - - - - Tolpis 85 



Akenes compressed, about 30-striate - Lapsana 86 



Akenes hook-shaped . - - - Garhadiolus 89 



Akenes with barbed prickles, the terminal recurved. Ksslpinia 87 

 Akenes all with pappus. 

 Akenes with a hollow stalk, not beaked - Scorzonera 113 

 Akenes not stalked. 



Akenes 4-angled, not beaked - - Tolpis 85 



Akenes of margin 4-5-angled, not beaked ; 



pappus united at base Picridium 107 

 Akenes cylindrical or prismatic, not beaked. 

 Pappus white, soft (in 97 outer akenes bald) 



Akenes 10-30-striate, similar 

 Akenes not striate, the inner white 

 Akenes striate, the inner with a hol- 

 low base 

 Pappus rusty or reddish - 

 Akenes more or less flattened, not beaked 

 Akenes of the margin only 'beaked 

 Akenes of the disk at least beaked 

 Akenes all beaked. 



10-30 striate ; pappus white, soft 



Crepis 

 Zollikoferia 



Cymboseris 



Hieracium 



Sonchus 



Zacyntha 



Crepis 



Crepis 



95 



109 



97 

 98 

 108 

 90 

 95 



95 



105 



Chondrilla 104 



Thrincia 

 Urospermum 



Picris 



compressed ; pappus on a disk at tip of beak Lactuca 



- terete ; pappus on disk at tip of beak. Cephalorrhynchus 106 



4-angled ; beak pyramidal at base - Taraxacum 103 



5-angled, tipped with crown-like scales 



and beak 

 Pappus plumose. 



Hairs of plumes not interlaced. 



Akenes muricate-wrinkled, outer beakless, 



inner beaked 

 Akenes muricate-lamellate, jointed with beak 

 Akenes transversely wrinkled. 

 Pappus in 1-2 rows, united in a ring or 



cup below 



Pappus of -disk akenes of 5 pales, of 



margin cup-like 



Pappus in 1 row of bristles at tip of 



slender beak 

 Akenes finely striate. Pappus in 1 -several 

 rows, dilated at base 

 Hairs of plumes interlaced. 



Pappus of marginal akenes chaffy, scabrous Geropogon 111 

 Pappus of all the akenes bristly, plumose. 

 Involucre in 1 row of 5-16, nearly equal 



scales 



Involucre in several rows of unequal 



scales (except S. lanata) 



103 

 113 



93 



Hagioseris 93 



Helminthia 



94 



Leontodon 101 



Tragopogon 110 

 Scorzonera 113 



