 | Jimmyweed, Jimmy Goldenweed Isocoma pluriflora (I. wrightii, Haplopappus heterophyllus) Asteraceae (Compositae) In the Trans-Pecos, jimmyweed is common in salty, alkaline or gypseous soils on dry hills and plains up to 6,000 feet. It is a shrub or subshrub with many slender upright stems that are topped with clusters of yellow flowers from June to September. Jimmyweed can be a weed in roadsides near irrigated areas or in overgrazed pastures. It is poisonous to livestock, causing "trembles", which can be passed through the milk to humans. Plant Habit or Use: small shrub Exposure: sun Flower Color: yellow Blooming Period: summer Fruit Characteristics: achene Height: 1 1/2 to 2 1/2 feet Width: 1 1/2 to 2 1/2 feet Plant Character: Heat Tolerance: very high Water Requirements:
Soil Requirements: alkaline Additional Comments:
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