. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 1290 Rural School Leaflet &Sh through which one who is susceptible to the poison of the plant cannot pass with safety. The leaves of poison ivy are very characteristic. They are composed of three rather broad leaflets, the two lateral leaflets being smaller than the terminal one. It has been suggested that these three leaflets might be considere
. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 1290 Rural School Leaflet &Sh through which one who is susceptible to the poison of the plant cannot pass with safety. The leaves of poison ivy are very characteristic. They are composed of three rather broad leaflets, the two lateral leaflets being smaller than the terminal one. It has been suggested that these three leaflets might be considered as a hand with one finger pointed in warning, while the leaf of the five-leaved ivy represents a hand spread open as a welcome. Some of the leaves of this plant resemble rather closely those of the bitter- sweet (Solatium Dulcamara L.), which is described later in this article. The flowers are rather inconspicuous and occur in loose clusters. The fruits are whitish or cream-colored, and are hard. The poison given off by the poison ivy plant often causes an irritation of the skin and considerable nervous excitement. As has been mentioned before, certain per- sons are immune to the poison. It has been stated that the plant gives off much more poison during the night or during damp, dark days, and at such times it is often unnecessary to touch the plant, as one may be poisoned by merely going near it. An indelible ink and a varnish for finish- ing boots and shoes are made from the milky juice of the poison ivy. 2. Poison sumac, swamp sumac, poison elder, poison or swamp dogwood, poison wood, poison ash, poison tree (Rhus Vernix,L.). The poison sumac is a smooth shrub three to thirty feet in height, and it is especially abundant in swampy places. The leaves of poison sumac are alternate and pinnately com- pound, that is, with numerous leaflets arranged opposite each other along a common axis. In this species there is always an odd number of leaflets, usually seven to thirteen. Th
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