Annales
Botanici Fennici Research on plants and fungi since 1964.
Annales Botanici Fennici volume 63 (2026)
Sajan A., Shibu N. & Sujana K.A. 2026: Pimpinella pygmaea (Apiaceae), a new species from Karimpuzha Wildlife Sanctuary, Kerala, India. — Ann. Bot. Fennici 63: 63–69. | EPUB
AbstractPimpinella pygmaea A. Sajan, Navya & Sujana(Apiaceae) is described as a new species from Karimpuzha Wildlife Sanctuary, Kerala, India. It shares morphological similarities with P. candolleana, P. leschenaultii and P. tomentosa, but can be distinguished from them by several morphological features, including plant height, leaf size and shape, number and size of rays, number of flowers, and surface of the schizocarp. A detailed description, including habitat, phenology, photographs and scanning electron micrographs of the schizocarp, is provided.
Hopkins T. 2026: Two-thirds of the seeds of invasive Himalayan balsam (Impatiens glandulifera) grow after overwintering at a western Finnish site. — Ann. Bot. Fennici 63: 57–61. | PDF
Abstract
Himalayan balsam (Impatiens glandulifera) is an invasive plant species in much of Europe. It is not well known how easily its seeds survive the winter and grow into seedlings, and eradication efforts typically focus on destroying plants in early summer before they produce seeds. I monitored both ripe and unripe balsam seeds spread onto the ground at a site with a balsam outbreak in western Finland. About two-thirds of the ripe seeds developed into seedlings the following year, as did a third of unripe seeds. Ripe seeds grew even better on disturbed ground with exposed soil. Each balsam plant thus has the potential to produce hundreds of viable offspring. For eradication efforts, the establishment rates observed at this site (1/3 unripe seeds and 2/3 ripe seeds) suggest that destroying sparsely growing balsam plants whose seeds are not yet ripe can be worthwhile and will considerably decrease the number of seedlings in the following year.
Mishra A.K. & Wagh V.V. 2026: Lectotypification of five names in Rhynchosia (Fabaceae). — Ann. Bot. Fennici 63: 49–56. | EPUB
Abstract
In the course of our taxonomic studies of the genus Rhynchosia (Fabaceae), we reviewed the typification status of the names of all species known from India. We found that the typification of five species names was problematic. Accordingly, we typify here the names Rhynchosia beddomei Baker, R. bracteata Benth. ex Baker, R. arvensis Benth. ex Baker, R. himalensis Benth. ex Baker and R. pulverulenta Stocks.
Chen W.-H., Lin Q., Li G.-Y., Zhang J.-G. & Shui Y.-M. 2026: Illicium nymphiiflorum (Schisandraceae), a new cauliflorous species from Yunnan, China. — Ann. Bot. Fennici 63: 43–47, doi.org/10.5735/085.063.0107. | EPUB
AbstractIllicium nymphiiflorum Q. Lin & Y.M. Shui sp. nova (Schisandraceae) is described from China. It especially resembles I. viridiflorum from South Vietnam in being cauliflorous and in having similar greenish-white flowers and single-seriate stamens. It differs, e.g., in leaf shape (obovate vs. elliptic), apex of the innermost petals (acute vs. obtuse), arrangement of stamens (vertical vs. horizontal) and number of follicles (12–14 vs. 4–8). It also resembles I. stapfii, from which it differs in several floral characters. According to IUCN categories and criteria, I. nymphiiflorum is assessed as Critically Endangered (CR).
Santoso H., Putra F.R. & Felayati T. 2026: Sida conduplicata (Malvaceae), a new species from Java, Indonesia. — Ann. Bot. Fennici 63: 37–41, doi.org/10.5735/085.063.0106. | EPUB
AbstractSida conduplicata H.Sant. & Felayati (Malvaceae) is described as a new species from East Java, Indonesia. It is similar to S. rhombifolia var. maderensis in having a single awn on the mericarp, but differs from it by a set of diagnostic morphological characters such as habit, leaf apex and surface of the mericarp. We provide an identification key to the species of Sida known from Java.
Viciani D., Viviani I. & Lastrucci L. 2026: Typification of six names published by Stéphen Sommier from Siberia. — Ann. Bot. Fennici 63: 27–36, doi.org/10.5735/085.063.0105. | EPUB
Abstract
We propose the typification of six names validly published by Stéphen Sommier and based on specimens collected during his trip to Siberia along the Ob River in 1880. The names are Polygonum aviculare var. rostratum Sommier, Pyrola rotundifolia var. marginata Sommier, Stachys palustris var. macrantha Sommier, Stellaria graminea f. diffusa Sommier, Thalictrum flavum var. laxum Sommier and Thalictrum polygynum Sommier. The proposed lectotypes are deposited at FI.
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, doi.org/10.5735/085.063.0104. | 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, doi.org/10.5735/085.063.0103. | EPUB
AbstractLitsea 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, doi.org/10.5735/085.063.0102. | EPUB
AbstractJusticia 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, doi.org/10.5735/085.063.0101. | 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.