SYNOPSIS OF THE GENERA. 



46. Hydroco'tyle, [Page 347.] Ca/?/a; margin obsolete. Petals 



ovate, entire, acute, with a straight point. Fruit com- 

 pressed at the sides, so as to form two flat nearly orbicular 

 lobes. Carpels with five filiform ridges, those of the sides 

 and back nearly obsolete, and the two intermediate ones 

 arched. Seeds carinated, compressed. 



47. Sani'cdla, [Page 347.] Calyx with a five toothed leafy 



margin. Petals erect, obovate, notched, with a slender 

 inflexed point, as long as the petal. Fruit sub-globose, 

 densely clothed with hooked prickles, without ridges, but 

 with many vitlce. General involucre lobed, partial of 

 many lanceolate segments. 



48. Eryn'gium, [Page 350.] Calyx with a five toothed leafy 



margin. Petals erect, oblong, notched with a slender 

 abruptly inflexed point the length of the petal. Fruit 

 obovate, densely clothed with pointed scales, without ridges 

 or vittae. Involucre of several leaves. Flotoers blue, upon 

 a scaly receptacle, collected into an oblong compact head. 

 f f Flotvers in compound umbels. 

 1. Fruit laterally compressed, with five primary filiform ridges. 

 Albumen be/ore plane or convex. 

 a. Petals entire. 



49. BupiEU'RUM, [Page 352.] Calyx limb obsolete. Petals 



roundish, entire, broad, closely rolled inwards, the sides 

 depressed. Fruit laterally compressed, crowned by the 

 recurved styles and depressed disk. Carpels with five 

 equal, winged, acute, filiform, or obsolete ridges, the lateral 

 ones forming the margin. Channels with or without 

 vittcc. Albumen plane in front. Involucre various. 

 Floivers yellow. Leaves undivided. 



50. Api'um, [Page 355.] C'a/i/x limb obsolete. Petals ronndish, 



entire, with an involute point. Fruit roundish, laterally 

 contracted, double. Carpels with five filiform equal ridges, 

 the two lateral ones forming the margin. Channels with 

 single vitt(s, the outer ones sometimes having two or 

 three. Albumen very convex at the back, plane in front. 

 Involucre wanting. Flotoers white. 



a. Swert'ia, [Page 335.] Calyx four or five-partite. Corolla 

 wheel-shaped, ihe limb of five segments, plane, with a 

 fimbriated gland at the base of each. Capsule of one 

 cell, and two valves, with marginal placentas. Seeds 

 numerous. — Named after Emanual Swert, a Dutch Bo- 

 tanist, who published a Florilegium in 1612, 



