SYNOPSIS OF THE GENERA. 
. Hyrocua'ris, [Page 1017.] Jnvolucrum oblong, imbri- 
cated. Receptacle paleaceous, the scales deciduous. 
Fruit striated, more or less beaked. Pappus feathery. 
B. Pappus feathery, receptacle naked. 
* Involucrum simple, leafy, equal. 
. Tracoro'gon, [Page 1019.] Jnvolucrum simple, of from 
eight to twelve leafy scales, united at the base. Recep- 
tacle naked. Fruit longitudinally striated and beaked. 
Pappus feathery. 
* Involucrum imbricated. 
3. Tarin'cra, [Page 1021.] Znvolucrum imbricated. Recep- 
tacle naked. Fruté gradually tapering into a beak. 
Pappus of the marginal florets short, scaly, cupped, of 
those of the disk short, feathery, unequal. 
. Pi'cras, [Page 1021.] Involucrum imbricated, of numerous 
equal erect scales, and several small linear scattered ones. 
Receptacle naked. Fruit gradually tapering into a 
point, transversely striated. Pappus deciduous, united 
into a ring at the base, the outer of a few hairs, the 
inner feathery. 
. Apar'cra, [Page 1022.] Jnvolucrum imbricated, of nu- 
merous hairy black scales. Receptacle naked. Fruit 
pointed, smooth. Pappus feathery. 
. Leonro'pon, [Page 1024.] Jnvoluerum imbricated, the 
outer scales frequently lax and flaccid. Receptacle 
naked. #ruzt with a very long slender beak. Pappus 
feathery, persistent, hairy. 
. Hetmin'ruta, [Page 1025.] _ Involucrum double, the inner 
of eight equal scales, the outer of four or five lax leafy 
ones. eceptacle naked. Fruit transversely striated, 
its beak long, capillary. Pappus feathery, persistent. 
C. Pappus simple, receptacle naked. 
* Pappus hair-like. 
. Lacru'ca, [Page 1026.] mnvolucrum cylindrical imbri- 
scales, membranous on the margin. /tecepéacle naked. 
Flowers few. Fruit compressed, terminating in a long 
slender beak. Pappus hairy, soft, fugacious, stalked. 
. Son’cuus, [Page 1029.] Jnvolucrum oblong, imbricated, 
with two rows of unequal scales. teceptacle naked. 
