IOWA ACADEMY OF SCIENCE 
167 
CORNACEAE. 
205. Cornus paniculata, L’Her. Dogwood. 
Widely distributed in the state. 
206. Cornus candidissima, Marsh. 
The fruits of this species are considered by some people to be poisonous, 
but there are no authentic cases. 
Metachlamydeae (Sympetalae). 
ERIC ALES. Ericaceae. 
207. Epigaea repens, L. Trailing Arbutus. 
Reported from a limited area in Northeastern Iowa. Supposed to be poison- 
ous. Contains the glucoside ericolin CsiHseChi. 
PRIMULALES. Primulaceae. 
208. Anagallis arvensis, L. Poor Man’s or Shepherd’s Weather Grass. 
Possibly growing in the state. Known to be poisonous. Contains the 
glucoside cyclamin C 20 H 34 O 10 . 
CONTORTAE. Oleaceae. 
209. Ligustrum vulgare, L. Privet. 
The privet is occasionally cultivated in the state, especially in Southern 
Iowa. The leaves and fruit of the plant are said to be poisonous. Prof. 
Chesnut says that accidents have been occasioned in children, both by 
fruit and the leaves. Contains the bitter principle syringopicrin C 26 H 24 O 17 . 
Menyanthaceae. 
210. Menyanthes trifoliata, L. Buckbean. 
The plant has bitter properties and is nauseous. Contains menyanthin 
C30H46O14. 
Apocynaceae. 
211. Apocynum androsaemifolium, L. Spreading Dogbane. 
Widely distributed in the state, probably poisonous. 
212. Apocynum cannabinum, L. Indian Hemp. 
Like the preceding. Contains apocynin, which is poisonous. 
213. Nereum oleander, L. Common Oleander. 
Cultivated. The leaves, stems and flowers are poisonous. The honey from 
the oleander flower is poisonous. The leaves are deadly poisonous to stock. 
Contains conessine C 12 H 20 N, neriin, which has the properties of digitalein, 
nerianthin bears a resemblance to digitalin. 
Asclepiadaceae. 
214. Asclepias tuberosa, L. Pleurisy-Root. 
Widely distributed in the state, especially on gravelly knolls and prairies. 
The leaves are more or less poisonous to stock. However, honey bees collect 
considerable honey from this plant. 
215. Asclepias incarnata, L. Swamp Milkweed. 
Poisonous, probably, like the preceding. The root is emetic and cathartic. 
216. Asclepias syriaca, L. Milkweed. 
Poisonous. Contains the glucoside asclepione, an amorphous bitter sub- 
stance. 
