Crotalaria sagittalis
 FAMILY: Fabaceae (Leguminosae)

 Occurs on dry open soil, waste places, and dry forest clearings.

 Crotalaria sagittalis is a small plant growing to less than half a meter tall, with spreading hairs; leaf stipules: decurrent on the stem; leaves: simple, entire, sessile, lanceolate flower on the stem to linear toward the top, 3-8 cm, to l.5 cm wide; inflorescence: 2-4 flowered racemes; flowers: yellow standard, 8 mm; stamens: 10, filaments fused; fruits: oblong, sessile pods, 2-3 cm. very inflated, when dry the seeds rattling in the pods; seeds: flat, kidney-shaped, brown beans, 2.5 mm long.

The herbage and seeds are considered toxic. Monocrotaline is present in the entire plant.

 Livestock show signs of stupor, labored breathing, weakness, emaciation, paralysis, and death. Postmortem: gross lesions: hemorrhag, petechiae, or large ecchymoses; organ congestion; abomasum, omasum, and gallbladder are edematous; cirrhosis of liver in prolonged cases; histological lesions: pulmonary changes, including emphysema, alternate with atelectasis and hemorrhage.

The presence of pyrrolizidine alkaloid monocrotaline. The additional alkaloids, fulvine and cristpatine, have been isolated and identified as macrocyclic esters of retorsine, which is also a toxic factor in the composite genus Senecio (see Arctium).

Gastric lavage, emesis ; treat symptoms asw they appear, supportive therapy.; possibly treatment with crystalline methionine.

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