FIGURE 4. Thismia nigricoronata. A in Thismia nigricoronata, a new species of Burmanniaceae (Thismieae, Dioscoreales) from Vang Vieng, Vientiane Province, Laos, and a key to subgeneric classification

FIGURE 4. Thismia nigricoronata. A. Plant in habitat. B. Habit. C. Close-up of the crown. D. Whole plant showing the structure of the crown. E. Whole plant showing the structure of the annulus. F. Transverse section of the perianth tube. G. Dorsal view of the crown. H. Stamens showing the anther locules. I. Stamens showing the connectives and staminal tube.