Annales Botanici Fennici
Research on plants and fungi since 1964.

Annales Botanici Fennici volume 63 (2026)

Parthiban A., Rasingam L., Sandhya Deepika D. & Bharathan H.P. 2026: Two new heterotypic synonyms in Rotala (Lythraceae) from India. — Ann. Bot. Fennici 63: 17–25. | EPUB

Abstract Based on morphology, we synonymise Rotala baileyana with R. tulunadensis and R. cheruchakkiensis with R. malampuzhensis. Updated morphological descriptions, photographs and notes on conservation status and phenology, as well as habitat and distribution of the accepted species are provided. A broader range of morphological variation within these species is documented.

Revathy V. & Robi A.J. 2026: Two new species of Litsea (Lauraceae) from the southern Western Ghats of Kerala, India. — Ann. Bot. Fennici 63: 9–16. | EPUB

Abstract Litsea meesapulimalaiana Revathy V. & Robi, and L. idukkiana Robi & Revathy V. (Lauraceae) are described and illustrated as new species from Kerala, India. They morphologically resemble L. gorayana and L. ligustrina, respectively, but there are consistent differences. Detailed descriptions, data on distribution and phenology, illustrations and colour photographs are provided to facilitate identification of the new species, along with a comparison with L. gorayana and L. ligustrina.

Parthiban A., Rasingam L. & Sandhya Deepika D. 2026: Justicia balakrishnaniana (Acanthaceae), a new species from Andaman and Nicobar Islands, India. — Ann. Bot. Fennici 63: 5–8. | EPUB

Abstract Justicia balakrishnaniana Parthiban, Rasingam & D. Sandhya Deepika (Acanthaceae) is described and illustrated as a new species from the Andaman and Nicobar Islands, India. It is morphologically allied to J. ekakusuma due to similarities in the inflorescence and bracteoles, but differs in its decumbent growth habit, stems that root at the lower nodes, 5-lobed calyx, fruits lacking a constriction at the middle and wingless seeds. An identification key to the species of Justicia in the Andaman and Nicobar Islands is provided.

Manikkara R. & Kaliyamurthy K. 2026: Lectotypification and correct authorship of the name Viscum ramosissimum (Santalaceae, tribe Visceae). — Ann. Bot. Fennici 63: 1–4. | EPUB

Abstract This paper addresses a long-standing nomenclatural confusion concerning the authorship of the name Viscum ramosissimum. Through a detailed review of its protologue, author citations and original materials, we conclude that it should be V. ramosissimum Wall. ex Wight & Arn. We also lectotypify the name in accordance with the International Code of Nomenclature for algae, fungi and plants.