— 424 DESCRIPTIONS OF NEW SPECIES 
Suborder III, LIGULIFLORA. 
Tribe VIII. CICHORACEA. (Vatu. Jussiev.) 
Subtribe 1. HyYosERIDES. (Lessing, Decand.) 
APOGON. (Hlhiott.) Surivat eee: ) 
Oxs. Involucrum - generally eightleayed, connivent in the fruit. Liguli 
about the length of the involucrum. 
- Apogon lyratum, (Nurrt.;) smooth and glaucous; cauline leaves dilated at the 
base, the lower and radical ones runcinate lyrate; pedicels two or three; pap- 
pus none; achenium smooth.—Serinia cespitosa? Rarinesqve, Flor. Lud., p. 
149. Probably a dwarf state, as it is not cespitose. 
Has. The plains of Arkansa, Very nearly allied to 2. humilis, from which it principally differs 
in its lower lyrate leaves; segments about two pairs, upper leaves elongated linear-lanceolate, the 
‘floral pair opposite. Involucrum eight-leaved. In 4. humilis, the summit of the pedicel, and base 
of the involucrum is often pubescent. 
*UROPAPPUS. 
e- ae (Section CatocaLais of Canais, Decand. in si 
Capitutom many-flowered. Involucrum ovate, loosely imbricate; sepals sub- 
lanceolate i in two or three series, the outer shorter. Receptacle naked, flat. 
" Florets about equal with the involuerum. Achenium subcylindric, minutely 
scabrous or muricate, striate, attenuated into a thick rostrum. Pappus of 
five linear-lanceolate, one-nerved pales, cleft at the summit, with a slender, 
somewhat scabrous awn issuing from the cleft—Smooth and rather slender 
annuals of Upper California, with long, linear, attenuated leaves, entire or 
pinnatifidly laciniate. Pedicels very long, scapiform, one-flowered. Flow- 
ers yellow. —(The name alludes to the singular setaceously caudate pappus. ) 
