- The T. cucumerina, L., is less common, bears a spindle- shaped or obovate fruit, is hairy and lacks ribs. - "The Medicinal Plants of the Philippines", T. H. Pardo de Tavera.
- When arrived at their full growth, they are somewhat obovate, and produce four spicules, which at length are surmounted each with a globose spore. - "Fungi: Their Nature and Uses", Mordecai Cubitt Cooke.
- Leaves: Clustered at the base, rather thick, obovate, toothed, and narrowed into spatulate- margined petioles. - "Wild Flowers Worth Knowing", Neltje Blanchan et al.