.45. coMPOsiM. 181 



43. Leontodon. Heads inany-flowered. Inv. double,; inner 

 . ptyllj in 1 row, erect; outel few, short, lax or adpressed^ 



imbricate. JFr. subcompressed,, mj^ieaie aratZ suddenly con- 

 tracted above, prolonged into a filifor^i beak. 



44. SoNCHTJs. Heads many-flowered, Phyll. imbricate in 

 2 or 8 rows, unequal. Fr. pldne-compressed, tnmcate, not 

 heaked. . , .,., 



45. MuiGEBitTM. Heads many-flowered. Inv. double ; inner 

 phyU. m ' 1 row ; outer sbort, lax, imbricate. Fr. compressed, 

 eonstripted above,, and, ending in a ciliate disk. Outer rows 

 of the pappus rigid and brittle. 



i*«#*« 



' Fruit terete, ribbed. Otherwise like the preceding section. 



46. : Cbepis. Heads many-flowered, Inv. do,uble ; inner 

 phyll. in 1 row; outer short, lax. Fr. terete, narrowed 

 upwards or beaked. Pappus soft. 



47. HiBBACiUM. Heads many-flowered. , I^hyll. imbricate, 

 many, oblong. Fr. truncate, not beaied, with a very abort 

 crenuiate margin. , Pappus brittle. 



^Anomalous Genus. Order AmbrosiacejE Link.] 



[48. Xanthium. Heads monoecius. — Male: inv. of 1 row 

 of free phyll., many-flowered. Receptacle scaly. Oor. 

 funneishaped, 6-cleft. Anth. free. Stigma blunt, entire. 

 — Fern. fl. 2, encloged within the inv. which ends in 1 — 2 

 beaks, is covered with hooked spines, and hardens over the 

 fruit. Cor. 0. Stam. 0. Stigmas 2, diverging, linear. 

 Fr. compressed, each occupying a cell in the involucre.] 



Suborder I. TUBULIFLORJE. Perfect flowers tubular, 



regular, teeth 4 or 5. ,, 



Tribe I. Eupatoriecg. , 



Style of the perfect fl. cylindric ;' branches long, slightly 

 clavate, downy above. Stigmatic lines slightly prominent, 

 often not extending to the middle of the branches. 



* Flowers all perfect. 



1. ExjpATo'Bnm lAnn. Hemp^Agrimony. 



1. F. cannaVimum (L.) ; 1. in 3 or 5 deep lanceolate serrate 

 segments the middle one longest. — St. herbaceous, erect, striate 



