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Colocasia Indica, Kunth. (Alocasia Indioa, Schott.) 
South Asia, South Sea Islands and East Australia. Culti- 
vated for its stem and tubers on swamps or rivulets. This 
stately plant will rise in favorable localities to a height of 
12 feet, the edible trunk attaining a considerable thickness, 
the leaves sometimes measuring 3 feet in length. In using 
the stem and root for food great care is needed to expel by 
the heating process all acridity. Colocasia odora and C. 
macrorrhiza seem varieties of this species. Several other 
Aroid plants deserve attention for test-culture on account 
of their edible roots, among them Cyrtosperma edulis, 
Seemann, from the Eeegee Islands. 
Conium maculatum, E. 
The Hemlock. Europe, North Africa, North and West 
Asia. A biennial herb, important for medicinal purposes. 
It should however not be allowed to stray from its planta- 
tions, as it is apt to be confounded with culinary species of 
Anthriscus, Chaerophyllum and Myrrhis, and may thus 
cause as a most dangerous plant disastrous mistakes. Active 
principles : Coniin, in the fruit also Conhydrin. 
Conopodium denudatum, Koch. 
Western Europe. The small tuberous roots of this herb, 
when boiled or roasted, are available for food and known as 
Earth Chesnuts. The plant is allied to Carum Bulbocasta- 
num. 
Convolvulus floridus, L. fil. 
Canary Island, A shrubby not climbing or winding species. 
With the following it yields the Atlantic Rosewood from 
stem and root. 
Convolvulus scoparius, E- £1. 
Teneriffe. One of the Rosewood plants. 
Convolvulus Scammonia, E. 
Mediterranean regions and Asia Minor. A perennial 
herb. Erom the root is obtained the purgative resin Scam- 
monia. 
