189 
COMPOSITJE. (COMPOSITE FAMILY.) 
42. Achillea. Ackenia flattened parallel with the scales of the in¬ 
volucre. Pappus none. Receptacle flat or small. Rays few. 
Suborder II. LIGULIFLORiE. 
Flowers all perfect, with ligulate corollas throughout. 
* Pappus none. 
58. Lampsana. Involucre cylindrical, of 8 scales, 8-12-flowered. 
* * Pappus chaffy, or of both chaff and bristles. 
59. Cichorium. Pappus a small crown of little bristle-form scales. 
60. Krigia. Pappus of 5 broad chafly scales, and 5 bristles. 
61. Cynthia. Pappus double; the outer short, of many minute chafly 
scales, the inner of numerous long capillary bristles. 
* * * Pappus plumose. 
62. Leontodon. Bristles of the pappus several, enlarged at the base. 
* * * * Pappus composed entirely of capillary bristles, not plumose. 
^ Pappus tawny or dirty white: achenia not flattened or beaked. 
63. Hieracium. Achenia oblong : pappus a single series. Flowers 
yellow. Scales of the involucre unequal. 
64. Nabalus. Achenia cylindrical: pappus copious. Flowers whit¬ 
ish or purplish. Scales of the involucre equal. 
— Pappus bright white (except one Mulgedium). 
65. Troximon. Achenia linear-oblong, not beaked. Pappus of co¬ 
pious and unequal bristles, some of them rigid. 
66. Taraxacum. Achenia long-beaked, terete, ribbed. Pappus soft. 
67. Lactuca. Achenia abruptly long-beaked, flat. Pappus soft. 
68. Mulgedium. Achenia flattish, with a short and thick beak. 
Pappus soft, in one species tawny. Flowers blue. 
69. Sonchus. Achenia flattish, beakless. Pappus very soft and fine. 
Flowers yellow. 
Suborder I. TUBULIFLOR^E. 
Tribe I. VERNONlX.CEiE. The Iron-weed Tribe. 
Heads discoid ; the flowers all alike, perfect, tubular. Branch¬ 
es of the style slender and thread-form or bristle-form, acute, hairy 
all over, the stigmatic lines only on the lower part. (CoTolla often 
slightly irregular.) 
1. TERNONIA, Schreb. Iron-weed. 
Heads 15 - many-flowered, in corymbose cymes. Involucre 
shorter than the flowers, of many appressed closely imbricated 
scales. Receptacle naked. Achenia cylindrical, ribbed. Pappus 
