UMBELLIFEILE. 87 



ORDER XLIH. UMBELLIF'ER^. (PARSLEY FAMILY.) 



Herbs with small flowers mostly in compound umbeh: 

 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 description 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 of 



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

 Leaves round-kidney-shaped. 



2. San ic ii la. 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. Daii'ciis. Stem bristly. Leaves twice or thrice-pinnate, or pinna- 



tifld. Bracts of the involucre pinnatifld, very long. Fruit ribbed, 

 the ribs bristly. 



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



ternately compound. Flowers white, the outer corollas larger 

 than the others. Fruit wing-margined at the junction of the car- 

 pels, very flat. Carpels 5-ribbed on the back. 



5. Pastiua'ca, Stem smooth, grooved. Leaves pinnate. Flowers 



yellow, all alike. Fruit as in No. 4. 



6 Fenced' annm. Low acaulescent herbs, with spindle-shaped roots 

 and twice-pinnate leaves. No involucre ; involucels of scarious- 

 margined (often purplish) lanceolate bractlets. Flowers white or 

 yellow. Fruit round, winged on the sides. N. W. only. 



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



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

 the back. 



8. Archangel'lca. 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. 



9. Conioselt'num. Stem smooth. Leaves 2-3-pinnately compound, the 



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

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



