Perezia Wrightii
Botanical name:
Perezia (Acourtia) Wrightii, Gray. - 1. Leaf (nat. size). 2. Flower head (nat. size), with bases of cut pedicels. 3. Root (1/3 nat. size). 4. Root deprived of the woolly covering. 5. Floret (nat. size). 6. Corolla. 7. Akene. 8. Stamens (magnified).
This image is from the article "On the Presence of Pipitzahoic Acid in the Perezias ..." in the American Journal of Pharmacy, 1884.
