326 PENTANDRIA TRIGYNIA. 



cortex black, 3-ribhed ; sides contracted from the commissure albv* 

 men white. 



140. CICUTA. Involucrum almost wanting; fruit ovate, solid, 5- 

 ribbed ; intervals prominent. 



e. Fruit hispid. 



141. DAUCUS. Involucrum pinnatifid; Jlowers somewhat radiant; 

 those of the disk abortive ; fruit oblong, with 5 aculeate ribs ; inter- 

 vals angular, hispid. 



f. Fruit pyramidal, rostrate. Involucrum 0. >' .*. 



142. MYRRHIS. Fruit crowned with the pistils ; ribs 5, acute. 



g. Fruit subovate, costate, sulcate. Universal and partial 

 involucra various. 



143. SIUM. Fruit somewhat prismatic, with 5 obtuse ribs ; intervali 

 subconvex ; involucrum entire. 



144. CONIUM. Fruit ovate, solid, with 5 obtuse ribs, crenulate when 

 immature; intervals flat; umbel with universal and partial invo- 

 lucra. 



h. Fruit compressed, flat, often winged. Involucra various. 



145. HERACLEUM. Fruit with a membranaceous margin ribs 3, 

 dorsal, obtuse ; intervals and commissure with clavate spots ; Jlow- 

 ers subradiant ; involucrum 0. 



146. PASTINAC A. Fruit oval, margined ; ribs obsolete ; interval? 

 striate ; commissures 2 ; universal and partial involucra 0. 



147. ANGELICA. Fruit subcompressed, with 3 acute winged ribs 

 intervals sulcate ; margin membranaceous. 



TRIGYNIA. 



* Flowers superior. 



148. VIBURNUM. Calyx minute, 5-toothed, superior; cor. 5-cleft; 

 lobes spreading or reflexed ; stigmas nearly sessile ; berry 1-seeded. 



149. SAMBUCUS. Calyx minute, 5-cleft; cor. subrotate, 5-cleft; 

 stigmas minute, sessile ; berry globose, 1-celled, 3-seeded. 



* Flowers inferior. 



150. RHUS. Calyx 5-parted; pet. 5; berry small, subglobose, with 

 one bony seed. 



151. STAPHYLEA. Calyx 5-parted, colored; pet. 5, inserted upon 

 the margin of a glandular, pentangular disk ; caps. 2 3, inflated, 

 partly united ; seeds 12 in each capsule, subglobose, with a lateral 

 cicatrix. 



