GENERA IN CLASS XIX. SYNGENESIA. lm 



Seed — A single one, oblong, often tetragonous, but common- 

 ly narrower at the base. It is either crowned,... or with the crown 

 wanting. The crown is of two kinds, either a pappus,,,, or a. pe- 

 rianthium:...\i a pappus, it is either sessile,... or placed on a stipes; 

 and consists of many radii, that are placed in a round, and are 

 either simple,... radiate,... or ramose : when the crown is a peri- 

 anthium, it is such as is described above under that head. 



The essence of a Jiosculose flower consists in having the anthe- 

 rae united in a cylinder, and a single seed below the receptacle 

 of the floret*. The orders of this class are six, containing se- 

 venty-three genera, viz. 



Order 1. Polygamia /equalis, comprehends such plants as 

 have compound flowers, of which the florets are all bisexual. 

 This order contains thirty genera, distinguished into 1. Semiflos- 

 culosa, with all the corollets ligulate, which contains thirty gene- 

 ra; Scolymus [golden thistle)... Ciciwriunl (succory, endive)... C a- 



TANANCHE...SER10LA...HYPOCH7ERIS (c«^5-e^)...GEROPOGON (old 



man's heard)... Rothia...Andryala...Triptilion...Tragopogon 

 (goat's-beard) . . . Arnopogon . . . Helm intia. . . Pi cri s (ox-tongue) . . . 

 Aspargia... Scorzonera... (v ipers grass) . . . Leontodon (dande- 

 lion)... Crepis (hawk's beard) . r .Chondrilla (gum-succory)... Pre- 

 nanthes... Lactuca (lettuce)... Hieracium (hawk-weed) . . . Son-* 

 chus (sow-thistle) ...ZAcmT ha... IjAVS an a (nipple-wort)... Rhaga- 

 diolus...Krigia...Hyoseris (sivine's succory) .. .Hedypnois (hawk-* 

 foV)...THRiNCiA...ToLPis. 2. Capitati, Jloivers in a head, all 

 the corollets tubular, spreading at the tip, contains nineteen genera ; 



ATRACTYLIS. . . ACARNA . . . SERRAT UL A (sUW-WOrt) . . . C ARTH AMUS (ba- 



stard, saffron)... Caulin a (carline thistle).. ..Arctium (burdock)... 



* That the essence of a Jiosculose, or compound flower, does not consist either in 

 the common calyx or receptacle, Linuceus argues from hence ; that the common calyx 

 is wanting in echinops, and the common receptacle in milleria, though both those 

 genera belong to this class ; and that, on the other hand, the common calyx is 

 found in scabiosa, and the common receptacle in dipsacus, both which plants belong 

 to the class Tetrandria, though they have, with the gomptirena and others, been 

 falsely ranged with the compound flowers. Author. 



