Krigi^. composite. 409 



Suborder IF. LIGULIFLORiE. DC. 



Flowers all ligulate and perfect. 



Tribe VI. CICHORACE^. Vaill. 

 Style cylindraceous above. 



CONSPECTUS OF THE GENERA. 



SubtribeJ. HYOSERIDEjE. Pappus either wholly or partly composed of chalTy or squamellate scales. Receptacle 

 not chafiy. 



* Involucre nearly simple, equal. 



46. Kricia. Pappus of 5 broad chaffy scales and 5 alternate bristles. 



47. Ctntiiia Pappus of numerous short squamellate and capillary bristles. 



** Involucre double or imbricated. 



48. CiCHOBiUM. Pappus short, of numerous small chaffy scales. 



Subtribe 2. LACTUCE^. Pappus capillary, not plumose. Receptacle not chaffy. 



49. HiERAciCM. Pappus rough, in a single series. Heads 20 - many-flowered (yellow). Achenia oblong or columnar. 



* Pappus dirty white or tawny, fragile. 



50. Nabalus. Pappus rough, copious. Heads 5 - 30-flowcred (not yellow), nodding. Achenia linear-oblong, terete. 



•• Pappus bright white (except in one Mulgedium). 



51. TiRAXACc.M. Involucre double, in 2 scries. Achenia striatc-angled, commonly muricate, with a long filiform beak. 



— Stemless. 



52. Lactuca. Achenia obcompressed, flat, abruptly produced into a filiform beak. Pappus very soft and white. 



53. McLGEDiDM. Achenia compressed, tapering into a short or thick beak. Pappus bright white or tawny. Flowers 



blue. 



54. SoNcmjs. Achenia compressed, not beaked. Pappus very soft and fine, bright white. Involucre becoming swollen 



at the base. Flowers yellow. 



Subtribe 1. Hyoseride^, Less. Receptacle not chaffy. Pappus simple or double, either 

 wholly or partly chaffy, squamellate or coroniform. 



46. KRIGIA.* Schr^b. ; DC. prodr. 7. p. 88. DWARF dandelion. 



[ Named in honor of David Krieo, a German botanist.] 



Heads 15 - 30-flowered. Scales of the involucre 6-15, somewhat in a double series, equal. 

 Receptacle naked. Achenia turbinate, niany-striatc, somewhat 5-anguiar. Pappus double ; 

 the exterior of five broad and rounded scarious cliaflfy scales ; the inner of as many slender 

 bristles alternating with the scales. — Small annual herbs, branching from the base. Leaves 

 mostly lyrate or lootiied, radical. Heads small, solitary, on long slender scape-like branches. 

 Flowers yellow. 



[Flora.] 52 



