;"S. arabica";"S. villosa";"S. wendelboi"
"Calyx texture";"not herbaceous, more or less membranaceous";"often herbaceous";"membranaceous in the lower and herbaceous in the upper part"
"Calyx length (mm)";11–13.5;12.5–18;17–23
"Pedicel length (mm)";2.5–7.5;4–19;(4–)5.5–16.5(–21)
"Shape of coronal scale";"oblong, apex dentate, acute";"oblong, apex entire, obtuse";"oblong, apex dentate, acute"
Inflorescence;"irregularly cymose, mostly monochasial";"irregularly cymose, mostly monochasial, rarely dichasial";"dichasial cyme"