4q6 syngenksia. 



phyllus, 3-dentatus. Cal. 5-phyllus. Sem. caly- 

 culo 4-phyllo involuta. 



663. BALTIMORA. ijecep/. paleaceum. Pappus x\u\\us. 



Flosc. radii 5. Cal. cylindricus, polyphyllus. Sem. 

 3-quetra. 



664. PARTHENIUM. Recept. paleaceum, planum. Pap- 



pus nullus. Cal. 5-phyllus. Sevi. obovata. 



665. IVA. i?ec6>p^ pilosum. Pappus nnWus. e'er, radii 5. 



AnthercB approximatae, non coalitae. Styli 2. longi. 

 Cor. radii 5. femineis minimis. Co/. 3- phyllus. 



6Q6. AMBROSIA. Monoka. Masc. Recept. nudum. An- 

 thercB approximatae, non coalitae. Cal. l-phyllus, 

 hemisphaericus, multiflorus. Fern. Cal. l-phyllus, 

 subinteger aut 5-dentatus, l-florus. Cor. nulla. Sty- 

 li 2. Nuxe calyce indurato, 1-sperma. 



667. XANTHIUM. Monokum. Masc. Recept. paleace- 

 um. Anthercr; approximatae, non coalitae, Cal. po- 

 lyphyllus, imbricatus, hemisphaericus,, multiflorus. 

 Fern. Cal. involucrum 2-phyllum, 2-florum. Cor.O. 

 Stigm. 2. Drupa sicca, muricata, 2-fida. Nucleus 

 2-locularis. 



V. SEGREGATA. 



668. ELEPHANTEPUS. Recept. nuAum. Pappus &etz- 

 ceus. Calyculus 4-florus. Corollulce ligulatae, ber- 

 maphroditae. 



I. MQ_UALIS, 



593. CICHORIUM. Gen. pi. 1251. 



Intyvus. 1. C. floribus axillaribus geminis subsessilibus, foliis runci- 



natis. JVilld. sp.pl. 3. p. l624. 



Icon. Fl. dan. 907. Engl. hot. 53g. 



In fields and on road sides : Pensylvania, near Philadel- 

 phia. Most certainly introduced from Europe. 1/. 

 July, Aug. V. V. Howers beautiful blue. 



