166 Order UMBELLALES 
Only the lateral ribs winged. 17. Lomatium. 
Fruits 8-12 mm. long, 4 mm. wide; flowers yellow. 
18. Cynomarathrum. 
Plants with tall, erect, leafy stems. 
Fruits about 4 mm. long; leaves pinnately decompound; 
flowers white. 13. Conioselinum. 
Fruits 5-12 mm. long. 
Leaves pinnate; flowers yellow. 
Leaflets lobed or incised; carpels wing-margined. 
19. Pastinaca. 
Leaflets pinnatifid or parted; carpels with thick, 
obtuse margins. 16. Polytznia. 
Leaves ternate, leaflets very broad; fruit 8-12 mm. 
long; flowers white. 20. Heracleum. 
1. Sanicula. 672. 
Fruit 6 mm. long; petals and anthers greenish-white. 
1. S. marylandica. 
Fruit 4 mm. long, or less. 
Calyx lobes ovate; styles longer than the bristles; petals yellow. 
. S. gregaria. 
Calyx lobes lanceolate; styles shorter than the bristles; petals 
white. 3. S. canadensis. 
1. Sanicula marylandica L. Snake-root. 
In woods mostly in the eastern part of the state. Harrison; Hast- 
ings; Indianola; Nebraska City; Weeping Water. 
2. Sanicula gregaria Bicknell. 
In woods and thickets mostly in the eastern part of the state. Lin- 
coln; Milford; Nebraska City; Ponca; Walton; Weeping Water. 
3. Sanicula canadensis L. 
In woods and thickets mostly along streams. Bordeaux; Lincoln; 
Plummer Ford; Red Cloud; Sioux county. 
2. Eryngium. 673. 
1. Eryngium aquaticum L. Button Snake-root. 
In wet places in the southeastern part of the state. Nemaha county. 
3. Washingtonia (Osmorrhiza). 675. 
Stylopodium and style 0.7-1 mm. long; fruit, not including the pedi- 
cel-like base, 1-1.3 cm. long. 1. W. claytoni. 
Stylopodium and style 2-4 mm. long; fruit 1.2-1.5 cm. long. 
2. W. longistylis. 
1. Washingtonia claytoni (Michx.) Britton. Sweet Cicely. 
In woods, mostly in the eastern part of the state. Fremont; Ne- 
hawka; Nebraska City; Ft. Niobrara; Ponca. 
2. Washingtonia longistylis (Torr.) Britton. 
In rich woods throughout the state, but most common in the east- 
ern part. Anselmo; Glen; Long Pine; Saltillo; Sioux county; Weep- 
ing Water. 
4. Apiastrum (Spermolepis). 676. 
1. Apiastrum patens (Nutt.) Coult. & Rose. 
In sandy prairies in the eastern part of the state. Atkinson; Fair- 
bury; Neligh; Oreopolis; Riverton; St. Paul. 
