i UMBELLIFERiE 99 



not divided, — and compound umbels of yellow flowers, the central 

 fruit of each umbel sessile. 



1. Z. a^ea, (L.) Koch. Golden Albxander. 



Radical leaves 2 or 3-ternate with long petioles, leaflets sharply serrate. 

 Banks of streams, Man. 



2. Z. cordata, (Walt.) DC. 



Root leaves long-petioled, cordate, crenately toothed, but rarely lobed; 

 stem leaves, except the highest, 3-foliate, with the leaflets serrate, or more or 

 less deeply cut. Prairies, Man.-Alta. 



6. MUSINEON. 



Calyx teeth prominent, ovate; petals with a claw; involucre 

 wanting; fruit ovate to oblong, slightly compressed. Low, some- 

 times stemless, peremiial herbs with pinnately decompound leaves, 

 and yellow or white flowers. (Musenium, Nutt.) 



1. M. divaric^tum, Nutt. 



Stem leafy, decumbent, branched, 6-12 in. high, glabrous; leaves bi- 

 pinnatifid, the rhachis winged; umbels on long peduncles; flowers yellow. 

 Dry hillsides, Man.-Alta. 



7. HERACLfeUM. Cow Parsnip. 



Calyx teeth obsolete or very small; petals clawed, the outer often 

 2-lobed; fruit broadly oval, much flattened dorsally. Stout, erect, 

 usually pubescent, perennial herbs with ternately compound leaves 

 and large umbels of white flowers. 



1. H. lan&tum, Michx. 



Very stout, 3-8 ft. high, woolly-pubesceut; leaflets broad and irregularly 

 cut. Wet ground, Man.-Alta. 



8. LOMATIUM. 



Calyx teeth obsolete or nearly so; fruit oval to oblong, dorsally 

 flattened. Stemless perennial herbs with bi-pinnate or finely 

 dissected leaves, and compound umbels of white or yellow flowers. 



1. L. orientaie, Coult. and Rose. 



Peduncles 3-8 in. high; leaves bi-pinnate, the divisions generally pin- 

 natifid into linear lobes, finely pubescent; root often swollen in places, 

 flowers white or pinkish ; umbels with 5-8 equal rays ; fruit glabrous, broadly 

 oval. Dry sandy soil, S. Man. and westward. 



