CHICOR1ACEAE (CHICORY FAMILY) 



4 a Plant usually branched; capsule much swollen 



INDIAN TOBACCO. (L. inftata.) 

 b Plant usually not branched ; capsule not swollen 



SPIKED LOBELIA. (L. spicata.) 



4 CHICOR1ACEAE. Chicory Family. 



1 a Heads i-2O-flowered, usually less than % in. broad.. 2 

 b Heads 30 or more flowered, usually % in. or more broad 3 



2 a Flowers blue or yellow 9. Lactuca. p 219 



b Flowers whitish, greenish, or purplish, never bright 



yellow 12. Nabulus. p 220 



3 a Flowers blue, purple, or pink 4 



b Flowers yellow, orange, or orange-red 5 



4 a Outer bracts of involucre shorter than the head 



i. Chicorium. p 219 

 b Outer bracts of the involucre longer than the head 



6. Tragopogon. p 219 



5 a Leaves all basal ; heads borne on leafless stalks 6 



b Leaves not all basal; heads borne on leafy stems.... 9 



6 a Flowering stalk hollow 7. Taraxacum, p 219 



b Flowering stalk not hollow 7 



7 a Leaves more or less entire n. Hieracium. p 219 



b Leaves pinnatifid or coarsely toothed 8 



8 a Heads i in. or more broad 4. Leontodon. p 219 



b Heads &% in. broad 3. Adopogon. p 219 



9 a Bracts of the involucre 15 or less, in i or a rows with 



no smaller outer ones; heads 1-3 in. broad 10 



b Bracts of the involucre usually 20 or more, or fewer 



and with several smaller outer ones u 



10 a Bracts of involucre 9-15; leaves lanceolate to obovate, 



mostly basal 3. Adopogon. p 219 



b Bracts of involucre 6-10; leaves linear, not mostly- 

 basal 6. Tragopogon. p 219 



11 a Bracts of involucre in several rows, each row success- 



ively smaller ; at least some leaves pinnatifid 



8. Sonchus. p 219 

 b Principal bracts of involucre in 1-3 rows usually with 



several smaller outer ones, but not successively smaller 12 



12 a Pappus wanting; heads %-% in. broad, numerous, in 



panicles % . 2. Lapsana. p 219 



b Pappus of capillary bristles; plants not completely as 



in a 13 



13 a Basal leaves pinnatifid or very coarsely toothed 



10. Crepis. p 219 

 b Basal leaves when present entire or somewhat toothed 14 



14 a Pappus white; plant not common 5. Picris. p 219 



b Pappus brownish; plants rather common 



n. Hieracium. p 219 



218 



