FIGURE 3 in Mammillaria monochrysacantha (Cactaceae), a new endemic species from Guanajuato, Mexico

FIGURE 3. Morphological comparison of some Mammillaria species with hair-like radial spines in M. ser Stylothelae. Mammillaria bocasana (first row: A–D). Mammillaria crinita (second row: E–H). Mammillaria monochrysacantha (third row: I–L). Mammillaria scheinvariana (fourth row: M–P). Mammillaria schwarzii (fifth row: Q–T). Comparison of growth form of the stem (first column); areole, central and radial spines (second column); close-up of plantlets (third column); and flower morphology (fourth column).