This is an intoxicating, herbaceous plant, with an erect stem which is furrowed its whole length. Leaves alternate, palmate, composed of five almost linear, serrate folioles on slender petioles. Flowers dioïchous, with a monophyllous greenish perianth, in groups of two, placed at the base of the leaves, and constituting a terminal spike. The male flowers with five reflexed divisions, five stamens with almost vesicular, pendant anthers; female flowers with an entire perianth that is split only on one side. Fruit ovoïd, with one seed. The haschich which has been introduced into Brazil by the blacks, is called by them pango; they are severely forbidden to grow it in Brazil. It can only be procured with difficulty. We employ the leaves. This narcotic develops a good many symptoms in those who make use of it. It is our belief that, if it had been sufficiently proved, it would be used as much as opium and belladonna. The few symptoms which we give below, are simply intended to stimulate others to continue the proving of this interesting agent. 1. Dizziness when stooping, vertigo, the head inclines backwards. Aching in occiput and temples. Beating headache at vertex. 5. Slight pain at the pit of the stomach. This pain is followed by a very marked pricking sensation. These pains cease after eating. Little appetite. 10. Contraction of the eyelids. Twinkling of the eyes. Pale face. Haggard looks. Languid eyes, heaviness of the head. Loss of appetite. 15. Very hungry. Bitter mouth. Tongue coated white. Urine thick and reddish. Very drowsy, even in the day-time. 20. Weary pain in the bend of the right elbow. Vivid, sometimes extatic dreams. Chill and heat all over. Shuddering. Pain in the joints. PETIVERIA TETRANDRA. (GOM.) PET. MAPPA GRAVEOLENS (WELL.) PIPI. ERVA DE PIPI. [Illustration] This bush is common in the fields around Rio-Janeiro, where it blossoms the whole year. Its branches are erect, somewhat sarmentose, slightly pubescent at their extremities, with alternate, glabrous, somewhat undulate leaves. Flowers small, scattered over long axillary or terminal spikes; perianth persistent, herbaceous, with four linear divisions. Stamens four, alternate with the divisions of the perianth and a little taller. A single ovary, surmounted by a style, divided into ten reflexed stigmata. Capsule flattened, containing a single seed. The roots are branching and very fibrous; they smell strongly of garlic. We employ the recent root. Prover: _Dr. Manuel Duarte Moreira._