This species which is one of the smallest of the genus Mimosa, is found in the prairies around Rio-Janeiro. Its stem is feeble, rather woody, ramose, pubescent above and covered with very sharp prickles. The leaves are bipinnate, the pinnae being three- or four-paired, with small, linear folioles, which close at the least contact; there are from 6 to 12 on each side of the spike. The flowers are small, sessile, forming pretty silky tufts of a violet color. The fruit is somewhat triangular, flattened, covered with long and stiff hairs, and surrounded by a persistent pericarp, divided in two capsules, each of which contains one seed.

First day. -1. Twitching of the arm, which extends even to the chest. Smarting pain in the legs, with lameness of the knee. Headache, with weakness of the stomach. Stomach-ache after breakfast. 5. Drowsiness. Flatulence and rumbling in the bowels. Yawning. Ptyalism. Shuddering. 10. Trembling of the legs. Lancinations in the legs and hands. Sneezing. Coryza and discharge from the nose. Inflamed eyes. 15. Papulae on the left leg. Constipation. Depression of spirits.

Second day. Frequent waking at night. Dry cough in the morning. 20. Stomach-ache after breakfast. Vertigo. Halo around the candlelight. Numbness of the hands. Stiffness of the bends of the knees. 25. Sense of heat in the head. The head seems larger than usual. Yawning. Indolent indifference. Flatulent colic in the evening. 30. Frequent stools, with colic. Papulous excrescence of the size of an almond on the right leg, painful and itching. The same swelling at the instep. Drowsy in the evening. Difficult breathing.

Third day. -35. Inflammatory swelling of the scrotum. Itching of the eyes. Pressure at the nape of the neck and the right temple. Papulous excrescence at the tendo-Achilles. Dimness of vision. 40. Pain in the sides of the head. Diarrhoea.

Fourth day. Swelling of the left ankle, with redness, tension and lancinations. The excrescences on the leg disappear; similar ones appear on the left arm. Easy stool. 45. Numbness of the arm and right hand, passing off when moving the parts. The left eye becomes inflamed. Want of breath.

Fifth day. Bleeding of the gums. The papulae disappear. 50. Acute lancinations, now in the legs, then in the arms. Violent lancinations in the back as from a penknife. Drowsy in the evening, with frequent waking at night.

Sixth day. Inflammatory swelling of the left hand. Shuddering.

Eighth day.-55. Flatulence. Diarrhoea.

Tenth day. Diarrhoea. Whizzing in the ears.


HEAD, &c.: 1. Vertigo. Indifference. Depression of spirits. Pain in the sides of the head. 5. Headache, with weak stomach. Heat in the head. The head feels as if swollen. Coryza, fluent. Itching of the eyes. 10. Dimness of sight. The left eye is inflamed. Inflamed eyes. Whizzing in the ears. Bleeding of the gums.

GASTRIC SYMPTOMS, &c.: 15. Ptyalism. Stomach-ache after breakfast. Flatulent colic. Diarrhoea. Easy stool. 20. Frequent stools with colic. Rumbling. Dry cough. Oppressed breathing.

EXTREMITIES: Pressure at nape of neck. 25. Lancinations in the back. Twitching of the arm. Smarting in the legs, with lame knee. Trembling of the legs. Lancinations in the legs and hand. 30. Stiffness of the bends of the knees. Numbness of the arm and right hand. Lancinations in the legs and arms. Inflammatory swelling of the left hand. Swelling of left ankle, with redness. 35. Yawning. Drowsy. Shuddering. Papulae on left leg and arm. Papulous excrescence on the right leg and instep.