A systematic study of Bonnaya section Bonnaya (Linderniaceae)

Abstract

Bonnaya Link & Otto section Bonnaya (Linderniaceae) is revised on the basis of morphological evidence. Eleven species, including the new species B. sanpabloensis, are recognised. Several names are reduced to synonymy or excluded from the genus Bonnaya, and a lectotype is designated for Bonnaya cyanea. A key to the genus is also provided.

Transfer of Torenia gracilis Benth. to Bonnaya as Bonnaya gracilis sp. nov. (Linderniaceae)

“…Sprengel (1825, p. 42) and B. veronicifolia (Retz.) Sprengel (1825, p. 41) (Sivarajan and Mathew 1983, Liang and Wang 2014, Sardesai et al 2019, Shimpale et al 2019).…”

“…The species was found to be closely similar to B. antipoda and B. sanpabloensis . However, a critical study of the collected specimens and survey of the relevant literature (Retzius 1786, Colsmann 1793, Sprengel 1824, Blatter and Hallberg 1918, Philcox 1968, Sivarajan and Mathew 1983, Liang and Wang 2014, Shimpale et al 2019) and herbarium collections (BM, C, K, LD) found no match for the plant. Later, comparing our specimens with Wallich Collection (K), we found that the specimens named Torenia gracilis Benth.…”

Bonnaya sanpabloensis (Linderniaceae): An addition to the flora of India

“…Therefore, the authors have approached Prof. Jenn-Che Wang, National Taiwan Normal University, Taiwan for his expert opinion and, the specimens were identified as Bonnaya sanpabloensis Y.S. Liang & J.C. Wang, a recently described species from South China, Thailand and Philippines (Liang & Wang, 2014). This species was previously been confused with B. antipoda because of its similarities Bonnaya sanpabloensis (Linderniaceae):…”

“…Distribution: Known from southern China, Thailand and the Philippines (Liang & Wang, 2014) and now from Maharashtra, India. Notes: During the present study two different populations were noticed from similar habitats.…”

“…According to Liang and Wang (2014) the flowers are solitary and axillary or in terminal racemes in B. antipoda while always in terminal racemes in B. sanpabloensis. But Philcox (1968) noted that, the flowers are in racemes or solitary in the leaf axils and intermediate between these two types being quite frequent in B. antipoda.…”