FIGURE 4 in Dendrobium tetrapterum, a cryptic species in the D. lindleyi alliance (Orchidaceae; Dendrobiinae): evidence from morphological and molecular data

FIGURE 4. Line drawing of Dendrobium tetrapterum. A. Flowering plant. B. Flower. C. Dorsal sepal. D. Petal. E. Lateral sepal. F. Lip. G. Lip base (enlarged view of dotted box of F). H. Anther cap and anther. I. Column and column foot. J. Stelidia (enlarged view of dotted box of I). K. Cross section of pseudobulbs in extreme cases.