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Zygophyllaceae
Fruit: Tribulus cistoides; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Zygophyllaceae
Seeds: Tribulus cistoides; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Zygophyllaceae
Embryo: Viscainoa geniculata; Illustration by K. Parker, Kirkbride et al. (2006)
Zygophyllaceae
Fruit: Zygophyllum howittii; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)

Zygophyllaceae
Seeds: Zygophyllum howittii; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)