The Fern Gazette Volume 21 Part 6

Published 15th December 2022
The Review and Main Articles will be available free of charge 2 years after the publication date.
Until then they can be purchased from Bridget Laue
Before then they will be accesible by BPS Members but will be password protected


Edited by M. Gibby & A. Leonard


MAIN ARTICLES

Pirin Quillwort, Isoetes pirinica sp. nov. (Isoetaceae), a new endemic Lycophyte from Bulgaria
D. F. Brunton, D. Ivanova & P. C. Sokoloff pg(s) 240-252
ABSTRACT
Isoetes pirinica sp. nov. is an endemic lycophyte of the eastern Balkan Region, found only in the Pirin Mountains of southwestern Bulgaria. It is the fourth decaploid (10×) species of the genus to be recognized globally. It has uniquely small spores for an Isoetes of such a ploidy level and commonly exhibits an exceptionally echinate-like megaspore ornamentation for a member of the I. lacustris complex. The species is one of many endemic vascular plants of the Pirin Mountains and is believed to be of recent (<12,000 years BP) origin. While geographically restricted, I. pirinica is locally abundant and at least for the foreseeable future, appears to have a secure and self-sustaining population.

Calymmodon pectinatus, a new species of Grammitid fern (Polypodiaceae) from Malesia
B.S. Parris pg(s) 254-259
ABSTRACT
A new species of grammitid fern, Calymmodon pectinatus (Polypodiaceae) is described from Malesia.

Three new hybrids of Japanese Cornopteroid ferns in the genus Athyrium (Athyriaceae)
K. Hori pg(s) 260-269
ABSTRACT
The morphological characteristics of three new hybrids from the islands of Honshu, Kyushu and Shikoku, Japan are described: Athyrium ×decurrentiserratum, A. ×pseudobipinnatum and A. ×subchristensenianum, and comparisons made with closely related species.

Christensenia aesculifolia: its diversity, distribution, conservation status and molecular identification from India
S. Patil, R. Patel, V. Rawat & K. Rajput pg(s) 270-276
ABSTRACT
The fern genus Christensenia has been viewed as an ancient lineage, restricted to tropical forests of China and Indo-Malaysian regions. In India it is restricted to the North-East states, viz., Arunachal Pradesh, Assam and Meghalaya. The present communication deals with the taxonomy, diversity, distribution and conservation status of the species C. aesculifolia from India. Identification of this taxon is confirmed from India by morphological features and DNA sequencing.

Taxonomic note on the genus Marsilea (Marsileaceae) in Thailand
S. Petchsri, S. Zungsontiporn & T. Boonkerd pg(s) 278-289
ABSTRACT
A review of the taxonomy of the genus Marsilea in Thailand is presented. Two indigenous species represent the genus: Marsilea minuta L., M. scalaripes D.M. Johnson, and two introduced species: M. drummondii A. Braun, M. mutica Mett. A key to species based on Thai specimens, together with the descriptions and illustrations, are provided. The taxonomic status of Marsilea in Cambodia, Laos PDR, and Vietnam is discussed.

BOOK REVIEW

An annotated checklist of Indian Pteridophytes, Part 3 (Lomariopsidaceae to Salviniaceae). Fraser-Jenkins, C.R., Gandhi, K.N. & Kholia, B.S. 2021. pp 450. Bishen Singh Mahendra Pal Singh, Dehra Dun, India. Price US $ 95.00, £75.00, Euro 90.00.
M. Gibby pg(s) 253
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