The Jepson Manual: Higher Plants of California

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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

Names are linked to treatments from the Manual


Key to MAMMILLARIA

N.B.: couplets are linked, e.g., 1. is linked to 1'.

  1. Radial spines > 30; seed with corky aril
 M. tetrancistra
  1' Radial spines < 30; seed without corky aril
 
    2. Radial spines white; perianth yellow to white; bristles present in axils of tubercles
 M. dioica
    2' Radial spines light brown to red; perianth lavender to reddish purple; axillary bristles 0
 M. grahamii var. grahamii

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