UMBELLIFKIUE. 53 



3. Pod 3-celled, 3-valved, loculicidal, the partitions breaking 

 away from the many-seeded axis. Mostly in south-western 

 Ontario. 



ORDER XLII. UMBELLIP'EB^J. (PARSLEY FAMILY.) 



Herbs with small flowers mostly in compound umbels. Calyx: 

 tube grown fast to the surface of the ovary ; calyx-teeth minute 

 or none. The 5 petals and 5 stamens inserted on a disk which 

 crowns the ovary. Styles 2. Fruit dry, 2-seeded. Stems hollow. 

 Leaves usually much cut. (See Part I., Chapter VII., for descrip< 

 tion of a typical flower. ) 



Synopsis of the Genera. 

 1. Seeds flat (not hollow) on the inner face. 



1. Hydrocot'yle. Umbels simple, or one springing from the summit <>j 



another, axillary. Flowers white. Stem slender and creeping. Leaves 

 round-kidney-shaped. 



2. Sanic'ula. Umbels irregular (or compound), the greenish flowers capitate 



in the umbellets. Leaves palmately lobed or parted. Fruit globular, 

 covered with hooked prickles. 



(In the Genera which follow, the umbels are regularly compound.) 



3. Dau'cus. Stem bristly. Leaves twice- or thrice-pinnate, or pinnatifid. 



Bracts of the involucre pinnatifid, very long. Fruit ribbed, the ribs 

 bristly. 



4. Heracle'um. Stem 3-4 feet high, woolly and grooved. Leaves 1-2-ter* 



nately compound. Flowers white, the outer corollas larger than the 

 others. Fruit wing-margined at the junction of the carpels, very flat. 

 Carpels 5-ribbed on the back. 



5. Pastina'ea. Stem smooth, grooved. Leaves pinnate. Flowers yellow, 



all alike. Fruit as in No. 4. 



6. Archem'ora. Stem smooth. Leaves pinnate, of -3-9 rather narrow 



leaflets. Floicers white. Fruit broadly winged, flat, 5-ribbed on the 

 back. 



7. Archangel'ica. Stem smooth, stout, purple. Leaves 2-3-ternately 



compound. Flowers greenish-white. Fruit smooth, flattish on the back, 

 double-wing-margined, each carpel with 3 ribs on the back. 



8. Conioseli'num. Stem smooth. Leaves finely 2-3-pinnately compound, 



the petioles inflated. Flowers white. Fruit doubly wing-margined, 

 and with 3 narrow wings on the back of each carpel. 



9. Thaspium. Stem smooth. Leaves 1-2-ternately divided. Flowers deep 



yellow. Fruit not flattened, 10 winged or ribbed. 



