Macdougal’s Nipple Cactus (Mammillaria heyderi var. macdougalii) https://t.co/5O2eg2Y50V

— Kenne Turner (@Kennetu) 2022.4.29

Texas Native Plant Lab / Dallas Arboretum I caught the little nipple cactus, Mammillaria heyderi, in some s … https://t.co/xCY2u85M8Y

— Dustin Miller (@zoopunkwild) 2018.4.21

41. Little Nipple Cactus (Mammillaria Heyderi) https://t.co/WZbHqGpS2G

— lex⁷ (@INNERMOONBTS) 2018.6.29

Photo: Mammillaria heyderi ssp. heyderi / winter fruits http://t.co/cBOkh6lKy9

— Dustin Miller (@zoopunkwild) 2014.1.23

Photo: Mammillaria heyderi / Heyder’s nipple cactus second specimen http://t.co/HfTnNBB9PM

— Dustin Miller (@zoopunkwild) 2013.9.18

Photo: Mammillaria heyderi ssp heyderi / afternoon shade http://t.co/XM6Xbtygp1

— Dustin Miller (@zoopunkwild) 2014.5.11

Photoset: Mammillaria heyderi ssp heyderi http://t.co/x6fs6TYvMr

— Dustin Miller (@zoopunkwild) 2014.5.9

Photo: Mammillaria heyderi ssp. heyderi / winter red http://t.co/76kEI0zeAn

— Dustin Miller (@zoopunkwild) 2014.3.19

Photo: Mammillaria heyderi ssp heyderi with grasshopper http://t.co/GrO90ClpU9

— Dustin Miller (@zoopunkwild) 2013.10.4

Nipple Cactus (Mammillaria heyderi) https://t.co/mKutVvkaVW

— Chet (@ChetGresham) 2016.8.21

Photo: #Mammillaria #heyderi #fruits #fruit #seeds #instacactus #instaplants #instagram #lovethecactus... http://tmblr.co/ZEiClu1te-lXT

— Miguel Angel Zepeda (@man_zepeda) 2015.9.6

Photo: #cacti #spines #cactus #cactaceae #arid #flower #cactus #Mammillaria #heyderi #nice #photo #picture... http://tmblr.co/ZEiClu1iyINtx

— Miguel Angel Zepeda (@man_zepeda) 2015.4.21

Foto: Mammillaria plumosa, Mammillaria heyderi ssp. meiacantha, Astrophytum asterias, Echinocereus adustus,... http://tmblr.co/ZEiClu1pWz5kf

— Miguel Angel Zepeda (@man_zepeda) 2015.7.14

Photoset: The Mammillaria heyderi ssp heyderi continues to chug along - I never cease to be amazed by their... http://t.co/HulKSs3VXB

— Dustin Miller (@zoopunkwild) 2013.5.22

Photoset: Mammillaria blooms and chilitos: M. heyderi ssp heyderi, M. hahniana, M. heyderi, M. nejapensis,... http://t.co/hklSVQSiFb

— Dustin Miller (@zoopunkwild) 2014.4.4

Photoset: I decided to move my Mammillaria heyderi ssp heyderi from its location under the crepe myrtle to... http://t.co/haEC6hvW3b

— Dustin Miller (@zoopunkwild) 2013.4.29

Photo: Mammillaria heyderi ssp. heyderi / One of the best characteristics of Mammillaria are their... http://t.co/CfqT7Pc7fH

— Dustin Miller (@zoopunkwild) 2013.6.24

Photoset: Day 2 of Mammillaria blooms I’m thinking this must be a Mammillaria heyderi ssp heyderi. It has 1... http://t.co/6GNtbtHM9k

— Dustin Miller (@zoopunkwild) 2013.4.18

Photo: Macdougal’s Nipple Cactus (Mammillaria heyderi var. macdougalii) Edi Moore guided us to a couple of... http://t.co/Kd0W9ZpGih

— Kenne Turner (@Kennetu) 2013.4.25

Macdougal's Nipple Cactus (Mammillaria heyderi var. macdougalii) http://t.co/ly5eG8Fl0s

— Kenne Turner (@Kennetu) 2013.4.25