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BLUMEA BLUMEA[Top of this page] [Catalogue of publications] [NHN]
Juan José Aldasoro, Carlos Aedo & Carmen Navarro
Phylogenetic relationships among 24 genera of Rosaceae subfam. Maloideae and Spiraeoideae are explored by means of a cladistic analysis; 16 morphological and anatomical characters were included in the analysis. Published suprageneric classifications and characters used in these classifications are briefly reviewed. Additionally, some new features are here reported, such as seed shape, presence or absence of endosperm, and number of cell layers in the seed coat and in the endosperm. Parsimony analyses indicate that Eriobotrya and Rhaphiolepis form a well-supported clade that is the sister to the remainder of the subfamily. This result is in agreement with published ITS sequence data. Other clades are not supported, with the exception of the group Amelanchier–Peraphyllum–Malacomeles. Results of several studies point toward North America as centre of origin for Maloideae, considering the distribution of closely related Spiraeoideae such as Vauquelinia and Lindleia. A non-metric multi-dimensional scaling analysis of Takhtajan’s biogeographic regions was carried out using presence/absence of genera as characters. Eastern Asia is a centre of diversity from which the number of shared taxa decreases in several directions. This can be associated with the retreat of many taxa belonging to the Early Tertiary tropical-subtropical flora towards the refuges of China, Indochina and Malaysia, after wet-temperate forests were progressively transformed during the Neogene, which seems to be the case of Eriobotrya and Rhaphiolepis. Finally, Osteomeles and Chamaemeles were postulated as long-distance dispersion events while Hesperomeles could have originated in North America and migrated into north-western South America.
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Lars W. Chatrou & Michael D. Pirie
Three new species of Annonaceae from Venezuela are described here: Cremastosperma venezuelanum Pirie, Klarobelia subglobosa Chatrou, and Pseudomalmea wingfieldii Chatrou. All three are represented by few collections (in comparison to those of other Neotropical species of Annonaceae). Klarobelia subglobosa and P. wingfieldii in particular are only known from a few individual specimens collected in areas vulnerable to habitat destruction. IUCN threat categories are assigned to these species.
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Michael D. Pirie
In advance of a taxonomic revision of the Neotropical genus Cremastosperma (Annonaceae) nine new species are described here: Cremastosperma antioquense, C. awaense, C. chococola, C. dolichocarpum, C. longipes, C. magdalenae, C. napoense, C. stenophyllum, and C. westrae. A key is presented for the identification of species of Cremastosperma from extra-Amazonian Colombia and Ecuador plus Panama.
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Paul J.M. Maas & Lubbert Y.Th. Westra
A new species, as an addition to the revision of the genus Pseudoxandra by Maas & Westra (2003), is described.
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M. Ateweberhan & W.F. Prud’homme van Reine
A survey of seaweeds was made in Eritrea in December 1995 and January 1996 on some islands of the Dahlak Archipelago and the surroundings of the port town of Massawa. During our study 101 specific and infraspecific taxa were identified, including 26 Chlorophyta, 20 Phaeophyta and 55 Rhodophyta. The survey resulted in 36 new records for Eritrea (11 Chlorophyta, 7 Phaeophyta and 18 Rhodophyta). Of these Eritrean records, 26 are new for the Red Sea (5 Chlorophyta, 4 Phaeophyta and 17 Rhodophyta). Comparison of records of seaweeds from localities in Eritrea to those from other localities in Eritrea as well as from other coasts of the western Indian Ocean have revealed that the regional distribution of seaweeds in the Red Sea is very patchy and that generally the area seems to be undersampled. The comparisons have also underscored the stressful seasonal environmental conditions for macroalgae in the southern Red Sea.
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Tatyana Livshultz, Tran The Bach, Somchanh Bounphanmy & Daniel Schott
Two new species, Dischidia dohtii Tran & Livsh. and D. cornuta Livsh., are described and illustrated. Dischidia rimicola Kerr is illustrated for the first time. All three species are associated with tree-nesting ants of the genus Crematogaster. Presentation experiments with seeds of D. rimicola indicate that they are attractive to the ants. The possible affinity between D. dohtii and the enigmatic D. khasiana Hook.f. from north-eastern India is discussed; D. khasiana is lectotypified. A key to the 14 species of Dischidia documented from Vietnam and Laos and a list of exsiccatae are provided.
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Le Cong Kiet, Paul J.A. Keßler & Marcel Eurlings
A new species of Aquilaria is described from Vietnam and keys to the flowering and fruiting specimens of all species from this region are provided. DNA sequences of the nrITS1-5.8S-ITS2 region seem to confirm its status as a distinct species.
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H. Kurzweil
The taxonomy of the Asian species of the genus Disperis (Orchidaceae) was examined. Following study of material from throughout the distribution range all previously recognised Asian taxa were considered synonymous, and therefore only one widespread species D. neilgherrensis Wight is recognised. While most plant parts are merely highly variable in their size, the structure of the lip appendage is not uniform in the Indian specimens.
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Mark C. Tebbitt
Begonia scottii, a new species of Begonia from northern Sumatra, Indonesia, is described and illustrated. The species is classified in the section Sphenanthera and a key to this and allied species within this section is provided.
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L.A. Craven & E. Biffin
The distinction between Anetholea and Syzygium is lessened due to the occurrence of epigeal germination and dry fruitedness in the latter genus also and it is concluded that Anetholea is better placed within Syzygium. Analysis of sequence data from nuclear ribosomal DNA and the chloroplast genome support this conclusion. The sole species of Anetholea, A. anisata, is transferred to Syzygium and the new combination, S. anisatum (Vickery) Craven & Biffin, made. Syzygium wilsonii subsp. cryptophlebium is reinstated at species rank, necessitating the new combination, S. cryptophlebium (F. Muell.) Craven & Biffin. Two new taxa of Syzygium are described from Australia, S. wilsonii subsp. epigaeum Craven & Biffin and S. maraca Craven & Biffin.
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Gemma L.C. Bramley
Section Dissimiles C.B. Clarke is reviewed. Eleven species are known, one of which is newly described here (C. fulvisericea), and one species is reduced to synonymy (C. producta = C. trisepala). The section is centred on Borneo, with two outlying species in Sumatra and one in Peninsular Malaysia. Section Dissimiles is defined by a unique combination of characters, the most distinctive of these are: a zygomorphic calyx (the upper three lobes are fused to form one but the tips remain free, and the lower two lobes are completely separated to the base); anisophyllous leaf pairs, and a small (generally less than 2 cm long), predominantly white, somewhat translucent corolla.
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Santiago Ortiz & Jose Luis Vivero Pol
We describe the new species Senecio balensis and propose a new nomenclatural combination Senecio schultzii subsp. chillaloense within the afroalpine Senecio nanus–S. schultzii complex from Ethiopia. Senecio schultzii var. lanatus is assigned to this subspecies.
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Kristo K.M. Kulju & Peter C. van Welzen
A revision of the Malesian species in the genus Cleidion is presented. Cleidion javanicum is shown to be the correct name for the widespread type species (instead of the name C. spiciflorum). A new species, C. luziae, resembling C. javanicum, is described from the Moluccas, New Guinea and the Solomon Islands. In addition, C. salomonis is synonymised with C. papuanum and C. lanceolatum is treated as a variety of C. ramosii. In total 7 Malesian Cleidion species are recognized. Cleidion megistophyllum from the Philippines cannot reliably be confirmed to belong to the genus due to lack of information and specimens and is treated as a doubtful species.
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Last modified april 24, 2006 by P. Hovenkamp.