Umbelliferae 715 



Ovary and fruit armed with hooked or barbed prickles; fruit not several times 

 longer than wide. 

 Plants glabrous; leaves palmately 3-7-foliolate ; flowers perfect or staminate, 



5918. Sanicula, p. 717. 



Plants pubescent; leaves pinnately decompound; flowers all perfect. 



Ovary and fruit flattened laterally, covered with hooked prickles; rays of 



umbels short 5945. Torilis, p. 720. 



Ovary and fruit flattened dorsally, covered with barbed bristles; rays of 



umbels long 6142. Daucus, p. 728. 



Ovary and fruit not armed. 



Fruit several times longer than wide; flowers white. 



Leaves trifoliolate with ovate leaflets; plants perennial, 3-9 dm high; involucels 



absent 6015. Cryptotaenia, p. 723. 



Leaves ternately compound with pinnatifid leaflets; plants annual, usually 2-5 



dm high; involucels present 5935. Chaerophyllum, p. 718. 



Fruit less than twice as long as wide ; flowers white or yellow. 



Leaves palmately or ternately divided, or the lower simple and the upper 

 ternate, or the lower palmate and the upper not cut or ternate, then 

 pinnate. 



Leaves densely tomentose; outer petals of the umbel larger and 2-cleft 



6122. Heracleum, p. 728, 



Leaves usually glabrous; outer petals of the umbel not larger nor 2-cleft. 



Central flower and fruit of umbellule sessile 6008. Zizia, p. 721. 



Central flower and fruit of umbellule not sessile. 



Plants small, from a bulblike tuber; involucre leafy 



5960. Erigenia, p. 720. 



Plants taller, from elongated roots ; involucre usually absent, never leafy. 

 Leaflets entire; plants glaucous and glabrous; involucel bracts usually 



absent 6031. Taenidia, p. 723. 



Leaflets not entire; plants glabrous or pubescent, never glaucous; 

 involucel bracts present. 

 Flowers yellow; calyx teeth prominent. . . .6076. Thaspium, p. 725. 

 Flowers white; calyx teeth small or obsolete. 



Plants annual; fruit about 3 mm long. . . .6048. Aethusa, p. 724. 

 Plants perennial; fruit 4-6 mm long. 



Leaves finely divided; involucral bracts linear or absent; plants 



of bogs and springy places. . .6081. Conioselinum, p. 726. 



Leaves not finely divided; leaflets serrate or sometimes incised; 



involucral bracts absent; plants of moist to dry habitats. 



Rays of umbel glabrous; fruit flattened laterally 



6070. Ligusticum, p. 724. 



Rays of umbel densely scabrous or densely short-pubescent; 



fruit flattened dorsally 6082. Angelica, p. 726. 



Leaves pinnately divided. 

 Involucre present. 



Stems abundantly specked with purple 5970. Conium, p. 720. 



Stems never specked with purple. 



Leaflets filiform; roots tuberous; garden escape. .6020. Carum, p. 723. 



Leaflets linear to lanceolate; roots not tuberous or a fascicle of tubers. 



Leaf margins regularly and sharply serrate to the base, usually with 



2-6 teeth to the cm; fruit about 3 mm long. . .6038. Sium, p. 724. 



Leaf margins remotely and irregularly dentate, usually only above 



the middle or entire, usually 1 or 2 teeth to the cm; fruit usually 



5-6 mm long 6107. Oxypolis, p. 727. 



Involucre usually absent. 



