268 
IOWA ACADEMY OF SCIENCES. 
Hercicleum lanatum Michx. Cow Parsnip. Bottoms ; 
quite frequent. 
Pastinaca sativa L. Parsnip. Introduced; escaped from 
cultivation. 
Thaspium aureurn Nutt. Woods. Not common. 
Pimpinella integer rima Benth. & Hook. Common; woods. 
Cicuta maculata L. Spotted Cowbane. Musquash Root. 
Beaver Poison. Common in wet ground. 
Osmorrhiza brevistylis DC. Sweet Cicely. Quite com- 
mon in woods. 
Cornace^e. Dogwood Family. 
Cornus stolonifera Michx. Red-osier Dogwood. Common 
in w r et places along streams. 
C. paniculata L’Her. Panicled Cornel. Thickets; very 
common. 
Caprifoliaceje. Honeysuckle Family. 
Sambucus canadensis L. Common Elder. Very common 
in rich bottoms. Troublesome in fields. 
Viburnum pubescens Pursh. Downy Arrow-wood. Rocky 
bluffs; frequent. 
V. prunifolium L. Black Haw. Thickets; rare. 
Triosteum per folia turn L. Tinker’s Weed. Horse Gentian. 
Common in open woods. 
Symphoricarpos vulgaris Michx. Indian currant. Coral- 
berry. Very common in open woods and along 
fences. This shrub is becoming troublesome in 
open timber pastures. 
Lonicera sempervirens Ait. Trumpet Honeysuckle. Rare. 
L. sullivantii Gray. Sullivant’s Honeysuckle. Not 
common; woods. 
RubiacevE. Madder Family. 
Cephalanthus occidentalis L. Buttonbush. Ponds; very 
rare. 
Galium aparine L. Cleavers. Goose Grass. Common 
in damp woods. 
G. concinnum Torr. & Gray. Bedstraw. Common; 
woods. 
