A. Syngonium section Oblongatum Croat, sect. nov. TYPE SPECIES: Syngonium llanoense Croat.
Lamina adulta oblonga aut oblonga-elliptica, basi subcordata; petiolus vaginatus prope usque ad apicem; lamina juvenalis intermediaque laminae adultae similis.

B. Syngonium section Cordatum Croat, sect. nov. TYPE SPECIES: Syngonium schottianum Wendl.
Lamina adulta simplex, lobis posticis bene evolutis; petiolus e 1/2 ad 4 A longitudinis usque vaginatus; laminajuvenalis intermediaque laminae adultae similis.

C. Syngonium section Pinnatilobum Croat, sect. nov. TYPE SPECIES: Syngonium steyermarkii Croat.
Lamina adulta profunde lobata incisa; petiolus vaginatus ad medium usque; lamina juvenalis simplex, ovata, basi cordata; lamina intermedia incisa magis.

D. Syngonium section Syngonium Croat, sect. nov. TYPE SPECIES: Syngonium auritum (L.) Schott.
Lamina adulta trisecta aut 5-11-pedatisecta; segmenta lateralia valde inaequilateralia; petiolus e 1/3 ad 4/5 longitudinis usque vaginatus; lamina juvenalis ovata aut elliptiea; lamina intermedia sagittata aut hastata.