Characters S. cataphracta S. geifolia S. mengtzeana
Foliar embryo present present present
Leaf shape rotund to reniform ovate to reniform triangular-cordate
Leaf margin coarsely dentate crenate-lobed coarsely dentate
Leaf texture leathery papery or slightly leathery thick leathery and slightly succulent
Adaxial surface of leaf blade concolorous, glandular hispid or nearly glabrous with streaks, glandular hispid or nearly glabrous concolorous, sparsely hispid or nearly glabrous
Abaxial surface of leaf blade white or virescent streaks brown or purple spots brown spots
Involucre triangular-lanceolate obscure obscure
Bracts linear-lanceolate linear linear
Capsule beaks winged when mature divergent divergent
Flowering time April to July May to September September to November