64O CICHORIACEAE 



5. C. maculosa Lam. Waste grounds : Mass. to N. J. and Pa. 



Rare as a weed. 



6. C. Calcitrapa L. In waste places and ballast: Mass. to N. V., 



N. J. and Va. Native of Europe. 



Rare as a weed near the larger settlements. 



Centaurea melitensis L., C. Phrygia L.. C. solstitialis L. and C. particulate! L. have 

 been collected as waifs. 



58. Cnicus L. 

 1. C. benedictus L. In waste places: N. S. to Md., Penn., Ala. 

 and on the Pacific Coast. Native of Europe. 

 Very rare as an occasional weed. 



There seems to be no satisfactory evidence that Chondrophora nudata (Michx.) 

 Britton, credited to N. J., was ever found in that state. 



The following have been collected from time to time, but are scarcely persistent; 

 Echinacea purpurea (L.) Moench., E. anguslifolia DC, Amphiachyris dracunculoide s 

 (DC.) Nutt., Ageralum conyzoides L., Heterotheca subaxillaris (Lam.) Britton and 

 Rusby., Filago arvensis L., F. minima Fries, Acanthospermum hispidum DC, A. humile 

 DC, A. xanthioides DC, Parthenium Hysterophorus L.. Melanthera deltoidea Michx., 

 Spilanthes repens (Walt.) Michx., Guizotia oleifera DC, Hemizomia pungens T. & C, 

 Flaveria bidentis (L.) B. L. Robinson, Anacyclus lomentosus L., Cenea lurbinata Pers., 

 Calendula arvensis L., C. officinalis L., Serratula tinctoria L., and Carthamus lanatus L. 



CICHORIACEAE 



Pappus of scales, or of scales and bristles, or none. 



Flowers blue or white; pappus of blunt scales. I. Cichorium. 



Flowers yellow. 



Pappus none; achenes 20-30 nerved. 2. Lapsana. 



Pappus of rounded scales; with or without an inner series 

 of bristles. 

 Perennial; pappus-scales 10-15, minute. 3. Cynthia. 



Annual; pappus-scales 5. obovate. 4. Krigia. 



Pappus, at least some of it of plumose bristles. 



Receptacle chaffy. 5. Hypochaeris. 



Receptacle naked. 



Plume-branches of the pappus not interwebbed. 



Plants scapose, the leaves basal. 6. Apargia. 



Plants leafy-stemmed. 7. Picris. 



Plume-branches of the pappus interwebbed. 8. Tragopogon. 



appus of simple bristles. 



Achenes spinulose, or with short processes near the summit. 9. Leontodon. 



Achenes smooth or papillose, not spinulose toward the summit. 

 Achenes flattened. 



Achenes truncate, not beaked; flowers yellow. 10. Sonchus. 



Achenes narrowed at the summit or beaked; flowers 



blue or yellow. II. Lactuca. 



Achenes cylindric or prismatic. 



