The automorphic nectary forms a disc with four protrusions at the base of the nectary.
Mirosława Chwil 2012, 'Flowering biology and nectary structure of Melissa officinalis L.', Acta Agrobotanicahttps://pbsociety.org.pl/journals/index.php/aa/article/view/1613. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Due to the protrusion of the nectariferous tissue, they are classified as automorphic nectaries.
Elżbieta Weryszko-Chmielewska, Marta Dmitruk 2012, 'Characteristics of blooming, floral nectaries and nectar of Malus sargentii Rehd.',Acta Agrobotanicahttps://pbsociety.org.pl/journals/index.php/aa/article/view/1639. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
This mineral appears in perfectly automorphic crystals with a tendency to envelope and then close porosity.
Sánchez Román, J., Blanco Sánchez, J. A. 1986, 'Formación de palygorskita asociada al flujo regional de las aguas subterráneas delborde S.O. de la Cuenca del Duero', Estudios Geologicoshttp://estudiosgeol.revistas.csic.es/index.php/estudiosgeol/article/view/760/789. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)