Tradescantia crassula, Link & Otto, 1828

Pellegrini, Marco Octávio De Oliveira, 2016, A new species of Tradescantia L. sect. Austrotradescantia D. R. Hunt (Commelinaceae) from Southern Brazil, Phytotaxa 265 (1), pp. 79-84 : 83

Key to the Tradescantia crassula group

1. Leaves distichously-alternate to spirally-alternate, blades with indumenta on both sides or only abaxially, rarely glabrous on both sides, secondary veins adaxially slightly impressed; pedicels and sepals velutine to glandulous to sparsely hispid to hispid, sepals without keels................................................................................................................................. Tradescantia cerinthoides Kunth

- Leaves always distichously-alternate, blades glabrous on both sides, secondary veins adaxially inconspicuous; pedicels glabrous, sepals glabrous or with hairs restricted to the keel, sepals keeled..................................................................................................... 2

2. Leaf-sheaths margins glabrous, leaf blades base obtuse to cordate to slightly amplexicaulous, rarely cuneate; floral buds ellipsoid; sepals glabrous; petals light-pink to pink ..................................................................................... Tradescantia seubertiana M.Pell.

2. Leaf-sheaths margins ciliate to setose, leaf blades base obtuse to truncate; floral buds broadly ovoid; sepals setose to sparsely setose along the keel; petals white............................................................................................ Tradescantia crassula Link & Otto