SYNOPSIS OF THE GENERA. 



obsolete. Petals obovate, notched with an iuflexed point 

 and very short claw. Fruit roundish, or the sides slightly 

 compressed. Carpels with five sharp equal vsdnged ridges, 

 the lateral ones forming the margin. Channels with many 

 vitt(S. Albumen half round. General involucre various, 

 partial of many segments; 



67. Si'LAUS, [Page 383]. Calyx margin obsolete. Petals obo- 

 vate oblong, entire, or somewhat notched, with an inflexed 

 point, either sessile or with an appendage at the base. 

 Fruit roundish. Carpels with five sharp equal somewhat 

 winged ridges, the lateral ones forming the margin. 

 Channels with many vittce. Albumen nearly round. 

 General involucre of a few segments, or wanting, partial 

 of many segments. 



3. Fruit with Jive primary filiform ridges, flat at the hack, with 

 winged acute or thickened margins. Albumen before plane 

 or convex. 



a. Ridges very slender, three at the back at equal distances, the 

 lateral ones remote, contiguous to the dilated border, or 

 make part with it. 



72. Pastin'aca, [Page 389.] CWt/x margin obsolete, or minutely 



toothed. Petals roundish, entire, rolled inwards with a 

 broad obtuse inflexed point. Fruit flattened at the back 

 with a dilated flat margin. Carpels with five very slender 

 filiform ridges, the three dorsal ones equi-distant, the lateral 

 ones remote, near to the dilated margin. Channels with 

 single vittce. Albumen flattened. General and partial 

 involucre of few segments, or wanting. 



73. Hera'cleum, [Page 390.] Calyx margin of five teeth. 



Petals obovate, emarginate, with an inflexed point, the 

 outer ones often radiant, bifid. Fruit flattened at the 

 back, with a broad plane margin. Carpels with very 

 slender ridges, the three dorsal ones equi-distant, the two 

 lateral ones remote, contiguous to the dilated margin. 

 Channels with single clavate vittce. Albumen flattened. 

 General involucre falling away, partial of numerous seg- 

 ments. 



74. Tordt'lium, [Page 392.] Calyx margin of five teeth. 



Petals obovate, emarginate, with an inflexed point, the 

 outer ones radiant, bifid. Fruit flattened at the back, 

 surrounded by a thickened often crenated accessory 

 margin. Carpels with five very slender ridges, the dorsal 



