Literature Archive: 2020 | 2021 | 2022 | 2023
Not all members of the International Cichorieae Network do have access to botanical libraries. As a service we would like to point to recent publications regarding Cichorieae. However, some articles will escape our attention. Therefore, your hints to recent publications are always welcome.
----------------------------------------------------
Collected by Norbert Kilian (Berlin) & Robert Parsons (Melbourne)
----------------------------------------------------
29 April 2024
Szeląg Z. 2024: Two new species in Hieracium sect. Alpestria (Asteraceae) from Mt. Babia Góra, Western Carpathians, Poland. – Phytotaxa 645: 278–285.
Abstract
"Two apomictic, tetraploid (x=9) species in Hieracium sect. Alpestria are described from Mt. Babia Góra, the northernmost mountain massif in the whole Carpathian chain with an alpine belt. Hieracium babiogorense combines the morphological features of H. prenanthoides s.lat. and H. bifidum s.lat., and H. besseri is of presumably hybrid origin between H. prenanthoides s.lat. and H. caesium s.lat. Both new species are illustrated with photos of the holotypes and live plants in the type localities."
29 April 2024
Fainelli F. Gottschlich G. & Orsenigo S. 2024: Nomenclatural notes on some names in the Hieracium tenuiflorum group (Asteraceae) of the Alps. – Phytotaxa 645: 131–148.
Abstract
"The names belonging to the Hieracium tenuiflorum group (sect. Hieracium) as published by Zahn and others are discussed and typified. The accepted names are H. tenuiflorum, H. tenuiflorum subsp. austrosilvularum, H. tenuiflorum subsp. glaucoviolascens, H. tenuiflorum subsp. pictoprasinum, H. tenuiflorum subsp. pseudomerianum, H. tenuiflorum subsp. sebini and H. murorum subsp. nemorensifolium. Where possible, also names at the ranks lower than species and subspecies (i.e. varieties, subvarieties, forms and subforms) were typified. Hieracium tenuiflorum is typified by specimens preserved in Herbarium Bicknell. All the subspecies were typified by specimens preserved in G, PAV and TR, except H. tenuiflorum subsp. austrosilvularum whose original material went very likely lost. Eight varieties, two subvarieties, fifteen forms and three subforms were typified by specimens preserved in B, BASBG, G, GRM, PAV, TR and Z/ZT."
29 April 2024
Xu Q., Yang L., An M.-T., Yu J.-H., Liu F. & Li Z. 2024: Ixeridium malingheense (Asteraceae), a new species from southwestern Guizhou, China. – Phytotaxa 645: 163–171.
Abstract
"A new Asteraceae species, Ixeridium malingheense Z.Li & Q.Xu sp. nov., from Xingyi City, south-western Guizhou, China, is described and illustrated based on morphological and molecular analyses. Compared with the other species of the genus, the species is most similar to I. yunnanense in a small stature, linear-lanceolate stem leaves, and short phyllaries. However, it is easily distinguished from the latter by its smaller basal leaves 18–34 × 5–13 mm (vs. 10–25 × 5 mm), spatulate or long-spatulate (vs. elliptic, lanceolate, or oblanceolate), petioles ca. 30–55 mm (vs. 10 mm to absent), outer phyllaries 1-seriate (vs. 2-seriate, unequal), achenes smaller 2.0–3.0 × 0.5–1.0 mm (vs. 3.2 × 0.6 mm), and a flowering period of March to May (vs. June). Molecular phylogenetic analyses based on nuclear ITS sequence data determined the systematic position of I. malingheense in Ixeridium."
29 April 2024
Ingimundardóttir G. V., Tyler T., Cronberg N., Hedrén M. & Andersson S. 2024: Dressed for the occasion! Ecotypic divergence, phenotypic plasticity and taxonomic value of capitulum characters of Scorzoneroides autumnalis (Asteraceae). – Nordic J. Bot. 2024(e04211): 1–11.
Abstract
"Scorzoneroides autumnalis is a highly polymorphic perennial with several described infraspecific taxa, largely differing in involucre colour and indumentum intensity. Here, we examine the role of ecotypic divergence and phenotypic plasticity in shaping large-scale geographical variation in these characters. We collected phenotypic data from herbarium specimens and garden-grown plants of S. autumnalis, representing several habitats throughout Scandinavia and Iceland, and subjected progenies from controlled crosses within a subset of the common garden material to different temperature regimes to assess patterns of phenotypic plasticity. Our results strongly suggest that colour and indumentum of involucral bracts, as well as the size of capitula (measured by ligule length), are environmentally plastic and much affected by temperature. Reduced temperature resulted in significantly larger capitula, with both thicker and darker involucre indumentum. Since dark colouration, dense indumentum and large floral structures have been shown to facilitate heat retention and insect visitation in other plant species growing in cold climate, we hypothesize that plants of S. autumnalis benefit from possessing these features under cool conditions, and that much of the geographical variation in capitulum characters reflects adaptive phenotypic plasticity rather than ecotypic divergence. For this reason, we deem these characters to have a low taxonomic value for distinguishing infraspecific taxa within S. autumnalis."
29 April 2024
Akyalçin H. & Altan S. 2024: Palynology of taxa of Crepis L. genus growing in Çanakkale, Türkiye. – KSU J. Agric. Nat. 27(1): 82–91.
Abstract
"This study investigated the pollen morphology of the taxa belonging to the genus Crepis L. collected from various localities in Çanakkale in 2015. Wodehouse (1935) and Acetolysis (Erdtman, 1960) methods were used in the research. Pollen morphologies of 3 species and two subspecies belonging to the Crepis L. genus were defined according to light microscopy (LM) and scanning electron microscopy (SEM) examinations. In LM, pollens are monad, radially symmetrical and isopolar. Pollens are suboblate and oblate spheroidal, Amb shape is inter-hexagonal-subtriangular. The pollen of the genus is tricolporate. The view from the equator is circular and oval. In the examinations made with LM, the ornamentation is echinulophate. Pollen has 15 lacunae as 3 poral, 6 abporal, 6 paraboral. Ornamentation is echinulophate; the tectum surface is microperforate. SEM micrographs of C. smyrnaea and C. commutata pollen show depressions at the corners of the polar field. The collapses are located on the paraboral lacunae and are distinctly lacuna-like. As a result, in this study, palynological features of C. smyrnaea DC., C. micrantha Czerep., C. commutata (Spreng.), C. reuterana Boiss. & Heldr. subsp. reuterana taxa were studied for the first time. C. smyrnaea DC. ex Froel. was collected for the first time in Çanakkale within the scope of this study, according to the type records in Flora of Turkey."
21 March 2024
Crawford D. J., Kelly J. K. & Anderson G. J. 2024: Reproductive biology of Asteraceae on oceanic islands. – Bot. Rev. 90: 67–108.
Abstract
"Asteraceae are among the most abundant angiosperm families on oceanic islands. The reproductive biology of Asteraceae is reviewed and the attributes of the family contributing to their success on islands are discussed. Asteraceae are effective dispersers (the small, single-seeded fruits are moved great distances by wind and birds), and colonization is most likely limited by establishment. The pollinators of the colonizing ancestors rarely disperse with them to islands. Divorced from the pollinators of their ancestral habitats, the capitulum of aggregated small, shallow flowers typical of Asteraceae facilitates pollination of colonizers by various novel biotic visitors and by wind. Self-compatible (SC) colonizing ancestors are common, permitting establishment of sexual populations from one or few propagules. However, several large insular lineages of Asteraceae originated from functionally self-incompatible (SI) colonizers that may have also possessed the capacity to set some self-seed. Establishment may also be facilitated by dominance relationships among S-alleles in the sporophytic SI (SSI) system of Asteraceae, increasing cross-compatibility within small populations. Factors potentially promoting outcrossing in SC Asteraceae are: gynomonoecy, with temporal separation of receptive pistillate ray florets and pollen presentation in the hermaphroditic disc florets of a capitulum (interfloral protogyny); and intrafloral protandry where pollen presentation occurs before stigmata become receptive. Dioecy, gynodioecy, and monoecy are infrequent sexual systems in insular Asteraceae. Multiple paternity is similar in island composites to other Asteraceae, suggesting that neither compatible mates nor pollinators are typically limiting. Additional studies, particularly with genomic markers, are needed for more refined insights into mating systems and paternity in island Asteraceae as these results have important conservation implications."
18 March 2024
Xu L.-S., Song Z.-Q., Liao S.-Y. & Chen Y.-S. 2024: Qineryangia, a new genus from the Hengduan Mountains and new insights into the phylogeny of the subtribe Crepidinae (Cichorieae, Asteraceae). – J. Syst. Evol.
https://doi.org/10.1111/jse.13066.
Abstract
"The Crepidinae are the largest subtribe of the Cichorieae (Asteraceae). Debate remains over the circumscription and phylogeny of this subtribe, mainly due to its complex morphology and the poor phylogenetic signal provided by traditional Sanger sequencing markers. In this study, a well-resolved phylogeny of the subtribe Crepidinae, consisting of seven highly supported clades, was obtained for the first time using nuclear data with a phylogenomics approach (Hyb-Seq). Using this phylogeny along with other evidence, we propose a new taxonomic framework for the Crepidinae with seven lines and 29 genera, which merges subtribe Chondrillinae with the Crepidinae. We also describe a new monotypic genus, Qineryangia, that is characterized by broad involucres, loose imbricate phyllaries with wavy margins, and thick pappus bristles."
18 March 2024
Gültepe M., Makbul S., Güzel M. E., Türker Z. & Coşkunçelebi K. 2024: Tragopogon davutii-turanii: a new species of Tragopogon from Anatolia. – Nordic J. Bot. 2024: e04178.
Abstract
"A new salsify species, Tragopogon davutii-turanii, is described from Anatolia based on micro-/macro-morphological and molecular evidence. The new species is morphologically similar to T. vvedenskyi and T. abbreviatus, but differs from T. vvedenskyi mainly in ligule colour and from T. abbreviatus by achene characters and number of phyllaries. In contrast to morphological similarities, based on the phylogenetic tree obtained from nrDNA ITS sequences T. davutii-turanii is closely related to T. stenophyllus and T. coelesyriacus. Diagnostic characters, description, and conservation status of the new species, as well as micro- and macro-morphological features of its achenes and pollen grains, are provided."
18 March 2024
Xu J.-J., Wang Z.-H., Dong H.-J., Tian Q., Chen L. & Zhong Q.-Q. 2024: Melanoseris penghuana (Lactucinae, Cichorieae, Asteraceae), a new species from North-central Yunnan, China. – PhytoKeys 238: 1–10.
Abstract
"In this paper, we describe a new species, Melanoseris penghuana, from Mt. Jiaozi Xueshan located in North-central Yunnan, China. Despite its morphological similarities to M. likiangensis, M. penghuana exhibits distinct differences in leaf texture, shape of terminal lobes, indumentum of leaves, peduncles, and involucres, as well as the length of the achenes. Additionally, the conservation status of this species is classified as Vulnerable through data analysis from two field surveys."
18 March 2024
Uhlemann I. & Thiele K. 2024: On artificial F1-hybrids and backcrosses between Taraxacum koksaghyz and species of Taraxacum sect. Taraxacum (T. officinale s. l.) and their invasive potential. – Schlechtendalia 41: 1–16.
Abstract
"Taraxacum koksaghyz, a rubber producing plant grown in temperate regions, is used together with diploid Taraxacum linearisquameum (sexual T. officinale s. l.) or triploid species of T. sect. Taraxacum (agamospermous (micro-)species of T. officinale s. l.) as parental plants to get artificial rubber producing hybrids. T. koksaghyz × T. oblongatum and T. ‘Hybrid 207’ are extremely rare triploid offspring examples for 2×/3× combinations. The invasive potential of T. ‘Hybrid 207’ seems to be low, but interspecific competition with weeds is stronger than in T. koksaghyz which completely failed to compete against weeds. Artificial hybrids from 2×/2× combinations (T. koksaghyz × T. linearisquameum and reciprocal and backcrosses with parents) are diploid, generally have a morphological intermediate appearance between parents and partially produce rubber (0.1–3.7%). The fertility of achenes of offsprings depends on the parental function (pollen recipient or pollen donor). In case of T. linearisquameum as pollen recipient, fertility will be high (85–97%) and in case of T. koksaghyz as pollen recipient, fertility is low (1.5–9%)."