Key to Mammillaria
View taxon page for Mammillaria
(For a list of species in Mammillaria, use the above link.)
Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.
1. Radial spines in 2–3 superimposed
ranks; outer
perianth parts long-fringed, inner perianth parts 20–28;
seed with large corky
aril ..... M. tetrancistra 1' Radial spines in 1
rank; outer perianth parts
entire 
Having margins that are continuous and smooth (i.e., without teeth, lobes, etc.).
or short-fringed, inner perianth parts 8–16; seed aril 0
2. Inner perianth parts cream to white;
bristles in
axils of
tubercles ..... M. dioica
Please use this Google Form for Contact/Feedback
Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, https://ucjeps.berkeley.edu/eflora/ [accessed on ]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.
Pertaining to or within an axil, especially a leaf axil.