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Using a computer-aided imaging system, the seed morphometric and colorimetric features of Astragalus terraccianoi, A. tegulensis and A. thermensis — all belonging to Astragalus sect. Melanocercis — were measured and analysed. The results confirmed differences between A. terraccianoi and A. tegulensis, as well as the validity of A. tegulensis. Differences between the Corsican and Sardinian populations of A. terraccianoi were also found.
We designate lectotypes for Statice canescens Host [= Armeria canescens (Host) Ebel] and A. majellensis Boiss. (Plumbaginaceae), selected from the original material stored at the Herbarium of Naturhistorische Museum in Wien (W) and at the Herbarium of the Conservatoire et Jardin Botaniques de la Ville de Genève (G), respectively.
Anogramma leptophylla is one of few homosporous ferns with ephemeral sporophytes and perennial gametophytic tubercules. This rare aspect of the life cycle has considerable bearing on the reproductive features of the gametophyte. Four populations in the Iberian Peninsula were selected to provide spores for laboratory cultures and to sample natural populations of gametophytes for comparative studies. Sexual expression and the role of the tubercule in the reproductive biology of this fern were studied. No significant differences were found between percentages of sexual versus asexual prothalli in natural populations or laboratory cultures, or between percentages of unisexual and bisexual prothalli. These results may indicate that sex in A. leptophylla is genetically determined instead of environmentally controlled as in most ferns. The presence of a gametophytic tubercule with nutrient reserves seems to be most favourable for the development of archegonia, and for the establishment of young sporophytes. This tubercule, which can resist stressful environmental conditions, allows for the development of new gametophytic outgrowths and of dormant embryos as soon as environmental conditions improve. This bryophyte-like behaviour gives this fern some advantages in colonisation and has probably contributed to its wide geographic range.
The aim of this study was to determine the extent and geographical pattern of intraspecific chemical and genetic variability of the lichen Hypogymnia physodes by comparing populations from different habitats. We analyzed the secondary lichen substances and their relative concentrations using HPTLC and HPLC in samples collected from sites with different environmental conditions. We identified seven lichen substances: the cortical atranorin and chloroatranorin, and the medullary physodalic, physodic, protocetraric, 3-hydroxyphysodic, and 2′-0-methylphysodic acids. The samples were uniform qualitatively, which means that H. physodes has only one chemotype. We detected quantitative chemical differences between the samples without any geographical pattern. We investigated 21 samples in order to study the connection between genotypic diversity of populations and geographical distribution. We determined the sequences of five loci (ITS, nucSSU, nucLSU, mitSSU, EF1α). We found no significant genetic differentiation among populations collected from different areas.
The present paper updates the taxonomy of Euphorbia subsect. Myrsiniteae for the Flora of Iran since the publication of Flora Iranica in 1964. We provide a key, descriptions, distribution maps and illustrations for the seven taxa of the subsection occurring in the country. The presence of E. monostyla and the absence of E. rigida is confirmed. The distribution of E. spinidens, E. myrsinites, E. marschalliana subsp. marschalliana and E. marschalliana subsp. armena is updated, and E. marschalliana subsp. woronowii is considered a synonym of E. marschalliana subsp. marschalliana.
We describe a new species of Lithocarpus from the central Kelabit Highlands of Sarawak, Malaysia with a distribution extending north to Mt. Kinabalu, Sabah. This species was included in a previous morphometric and phylogenetic study of the section Synaedrys, mistakenly identified as L. rotundatus. Several individuals were observed on the western slopes of Mt. Kinabalu between the elevation of 1200–1500 meters. The species has a distinctive cupule, which usually completely encloses the nut and is very dark in color, almost black with a brittle texture similar to charcoal. The fruit is semi-hemispheric in shape and the bracts on the cupule are entirely fused, relatively sparse, stiff, brittle, and prominent.
Gyalecta titovii sp. nova is described from Abkhazia and Russia from the Black Sea coast in the Caucasus region. It is morphologically and anatomically similar to G. flotowii and G. truncigena. It mainly differs from G. flotowii in having ellipsoid and more muriform ascospores (6–12 cells visible in optical view). Gyalecta truncigena has similar ascospores, but the apothecia of G. truncigena are larger (0.3–0.7 mm diam.) and their margins are dark.
Cirsium yildizianum Arabacı & Dirmenci sp. nova (Asteraceae: Cynareae) is described from East Anatolia, Turkey. It belongs to the section Epitrachys and is morphologically close to C. macrobotrys and C. turkestanicum s. lato. It differs from them mainly in its habit, distinctly pedunculate inflorescence, capitula number and the features of the phyllaries.
Campanula hacerae A. İlçim sp. nova (Campanulaceae) from Turkey is described and illustrated. It grows on the slopes of gypsum hills located between Kayseri and Sivas in central Anatolia and flowers in the middle of July. Its diagnostic morphological characters relative to some closely related species are discussed.
Hoya sapaensis T.B. Tran & Rodda sp. nova (Apocynaceae) from Vietnam is described, illustrated and compared with the morphologically similar H. carnosa and H. bonii. Hoya sapaensis distinctly differs in the length of the pollinium and corpusculum, number of flowers per inflorescence, and the shape of the corolla.
Tylophora lui Y.H. Tseng & C.T. Chao, a new species of Apocynaceae from southern Taiwan, is described and illustrated. It resembles T. ovata in the shape and size of the leaves and flowers, but differs by the indumentum of stems, the number of flowers, and by the glabrous and slender inflorescences. An identification key to the Taiwanese Tylophora species is provided.
Aspidistra longituba Yan Liu & C.R. Lin (Ruscaceae) is described and illustrated as a new species from the limestone areas in the Guangxi Zhuangzu Autonomous Region, China. The new species is similar to A. claviformis, but differs in its longer perianth tube that is up to 1.6–2 cm, suberect or incurved lobes with basal appendages, and in the articulate style base.
Stipa albasiensis L.Q. Zhao & K. Guo, a new species from Inner Mongolia of China, is described. It appears most similar to S. glareosa and S. caucasica. The distinguishing characters are given in a key to the three species.
Magnolia bidoupensis Q.N. Vu sp. nova (Magnoliaceae) from Bidoup-Nuiba National Park, Lam Dong Province, S Vietnam is described and illustrated. It is morphologically close to M. odoratissima and M. albosericea, from which it differs chiefly by having a thickly leathery, broadly elliptic or ovate leaf blade with a broadly rounded base and an obtuse apex, smaller flowers, clavate stamens with an obtuse apex, and irregularly 3-winged ovules.