Topic
Biarum
About: Biarum is a research topic. Over the lifetime, 3 publications have been published within this topic receiving 147 citations.
Papers
1 Jan 2006
TL;DR: Boyce et al. as mentioned in this paper described 21 species of dwarf tuberous-stemmed herbs occurring in semi-arid and seasonally dry areas of southern Europe, North Africa, the Near and Middle East.
Abstract: I NTRODUCTION Biarum comprises 21 species of dwarf tuberous-stemmed herbs occurring in semi-arid and seasonally dry areas of southern Europe, North Africa, the Near and Middle East. The centre of diversity is the Middle East, where 75% of the species occur as endemics. Biarum species have a strongly seasonal growth regime; the plants begin growth in late summer or early autumn with the onset of winter rains, continuing into late spring when they become dormant at the start of summer heat and drought. The majority of species blossom in autumn and early winter and this, together with the often striking appearance of the infl orescence, has resulted in the growing popularity of Biarum species amongst alpine garden enthusiasts. In most species the infl orescence emerges from the bare ground before the leaves (hysteranthous), but in some species the leaves are regularly synanthous, emerging at the same time as the infl orescence, and a few, such as Biarum syriacum , are proteranthous, with the infl orescence emerging after the leaves have developed. A taxonomic summary of the genus was given in Aroideana (Boyce 2006). Further aspects of the horticultural popularity of the genus have been covered by Mayo (1983) and Mathew (1987).
9 citations
Journal Article•
TL;DR: Barum ditschianum from SWTurkey is described as a species new to science and illustrated and its possible relationships within the genus Araceae are discussed.
Abstract: Bogner,J. & Boyce, P.: A remarkable new Biarum (Araceae) from Turkey. - Willdenowia 18: 409-417. 1989. - ISSN 0511-9618. Biarum ditschianum from SWTurkey is described as a species new to science and illustrated. Its possible relationships within the genus are discussed.
6 citations
TL;DR: Combined evidence corroborates a relictual origin for the endemic Helicodiceros muscivorus and Arum pictum, the former apparently representing the first documented case of vicariance driven by the initial splitting of the Hercynian belt in the Early Oligocene, and confirms the proposed heterogeneous origins of the Mediterranean flora.
Abstract: Despite the remarkable species richness of the Mediterranean flora and its well-known geological history, few studies have investigated its temporal and spatial origins. Most importantly, the relative contribution of geological processes and long-distance dispersal to the composition of contemporary Mediterranean biotas remains largely unknown. We used phylogenetic analyses of sequences from six chloroplast DNA markers, Bayesian dating methods, and ancestral area reconstructions, in combination with paleogeographic, paleoclimatic, and ecological evidence, to elucidate the time frame and biogeographic events associated with the diversification of Araceae in the Mediterranean Basin. We focused on the origin of four species, Ambrosina bassii, Biarum dispar, Helicodiceros muscivorus, Arum pictum, subendemic or endemic to Corsica, Sardinia, and the Balearic Archipelago. The results support two main invasions of the Mediterranean Basin by the Araceae, one from an area connecting North America and Eurasia in the Late Cretaceous and one from the Anatolian microplate in western Asia during the Late Eocene, thus confirming the proposed heterogeneous origins of the Mediterranean flora. The subendemic Ambrosina bassii and Biarum dispar likely diverged sympatrically from their widespread Mediterranean sister clades in the Early-Middle Eocene and Early-Middle Miocene, respectively. Combined evidence corroborates a relictual origin for the endemic Helicodiceros muscivorus and Arum pictum, the former apparently representing the first documented case of vicariance driven by the initial splitting of the Hercynian belt in the Early Oligocene. A recurrent theme emerging from our analyses is that land connections and interruptions, caused by repeated cycles of marine transgressions-regressions between the Tethys and Paratethys, favored geodispersalist expansion of biotic ranges from western Asia into the western Mediterranean Basin and subsequent allopatric speciation at different points in time from the Late Eocene to the Late Oligocene.
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2008 | 1 |
| 2006 | 1 |
| 1989 | 1 |