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1.
Lithospermum (Boraginaceae) comprises approximately 40 species in both the Old and New Worlds, with a center of diversity in the southwestern
United States and Mexico. Using ten cpDNA regions, a phylogeny of Lithospermum and related taxa was reconstructed. Lithospermum (including New World and Old World species) and related New World members of Lithospermeae form a monophyletic group, with
Macromeria, Onosmodium, Nomosa, Lasiarrhenum, and Psilolaemus nested among species of Lithospermum. New World Lithospermeae also is a monophyletic group, with Eurasian species of Lithospermum sister to this group. Because Lithospermum is not monophyletic without the inclusion of the other New World genera, species from these genera are transferred to Lithospermum, and appropriate nomenclatural changes are made. New combinations are Lithospermum album, Lithospermum barbigerum, Lithospermum dodrantale, Lithospermum exsertum, Lithospermum helleri, Lithospemum leonotis, Lithospermum notatum, Lithospermum oaxacanum, Lithospermum pinetorum, Lithospermum rosei, Lithospermum trinverium, and Lithospermum unicum; new names are Lithospermum chiapense, Lithospermum johnstonii, Lithospermum macromeria, Lithospermum onosmodium, Lithospermum rzedowskii, and Lithospermum turneri. 相似文献
2.
Petra Hoffmann 《Brittonia》2008,60(2):136-166
Heterosavia (Phyllanthaceae) is segregated from Savia (tribe Bridelieae), recognized at generic rank, and placed in tribe Phyllantheae. Floral, fruit, leaf anatomical, leaf venation,
and pollen characters of the neotropical taxa previously united as Savia including Gonatogyne are discussed and illustrated. Keys to the three genera and to the species of Heterosavia are presented. Four species (all new combinations), Heterosavia bahamensis, H. erythroxyloides, H. laurifolia, and H. maculata, are recognized. The new combinations Heterosavia laurifolia var. intermedia and H. maculata var. clementis are proposed. The names Heterosavia, H. erythroxyloides, H. laurifolia, Savia clementis, S. clusiifolia, S. clusiifolia var. fallax, and S. longipes are lectotypified. Distribution maps and conservation assessments (IUCN ratings) of Heterosavia species and varieties are provided. 相似文献
3.
Five new species of Geonoma from Ecuador, G. awaensis, G. ecuadoriensis, G. hollinensis, G. lanata, and G. skovii, are described and illustrated and are compared to similar species. Their distributions are mapped. 相似文献
4.
Jacquelyn A. Kallunki 《Brittonia》2009,61(1):28-34
The name Neoraputia was published without citation of the type, making it and the names of the four species transferred to it invalid. The genus
name and combinations are validated here. Lectotypes are chosen for the basionyms, Aruba alba, Raputia magnifica, R. paraensis, and Raputia trifoliata. Two new species, Neoraputia micrantha and N. calliantha, from forests of eastern Bahia, Brazil, are described. 相似文献
5.
Leslie R. Landrum 《Brittonia》2008,60(3):252-256
Two new species of Calycolpus from Brazil are described and illustrated, C. andersonii from Pará and C. sessiliflorus from Bahia. 相似文献
6.
7.
Polygala pauciramosa, a new species from the Federal District and the state of Goiás is described, illustrated, and compared with related species
of Polygala subgenus Hebeclada. The new species is an herb that grows in seasonally to permanently wet savannas. A key to the species of Polygala subgenus Hebeclada from Goiás state, Brazil is provided. 相似文献
8.
John T. Mickel 《Brittonia》2008,60(3):213-216
Three new species of Elaphoglossum are described from the Guianas: E. arachnidoideum, E. boudriei, and E. cremersii. 相似文献
9.
To evaluate the phylogenetic relationships of species in Pseudoroegneria and related genera, the nuclear ribosomal internal transcribed spacer (ITS) sequences were analyzed for eighteen Pseudoroegneria (St), two Elytrigia (E
e
St), two Douglasdeweya (StP), three Lophopyrum (E
e
and E
b
), three Agropyron (P), two Hordeum (H), two Australopyrum (W) and two Psathyrostachys (Ns) accessions. The main results were: (i) Pseudoroegneria gracillima, P. stipifolia, P. cognata and P. strigosa (2x) were in one clade, while P. libanotica, P. tauri and P. spicata (2x) were in the other clade, indicating there are the differentiations of St genome among diploid Pseudoroegneria species; (ii) P. geniculata ssp. scythica, P. geniculata ssp. pruinifera, Elytriga caespitosa and Et. caespitosa ssp. nodosa formed the E
e
St clade with 6-bp indel in ITS1 regions; and (iii) Douglasdeweya wangii, D. deweyi, Agropyron cristatum and A. puberulum comprised the P clade. It is unreasonable to treat P. geniculata ssp. scythica and P. geniculata ssp. pruinifera as the subspecies of P. geniculata, and they should be transferred to a new genus Trichopyrum, which consists of species with E
e
St genomes. It is also suggested that one of the diploid donor of D. wangii and D. deweyi is derived from Agropyron species, and it is reasonable to treat tetraploid species with StP genomes into Douglasdeweya. 相似文献
10.
P. Ellneskog-Staam R. von Bothmer K. Anamthawat-Jónsson B. Salomon 《Plant Systematics and Evolution》2007,265(3-4):241-249
Genomic in situ hybridisation (GISH) and Southern genomic hybridisation were applied in order to gain further knowledge regarding generic
delimitation of the genus Hystrix as well as to clarify the genomes of the Hystrix species H. patula, H. longearistata, H. coreana, H. duthiei and H. komarovii. The hybridisation intensity of different genomic probes was compared among the Hystrix species and with other Triticeae species. The Southern- and GISH results confirm that H. patula contains the StH genome and show that H. komarovii most likely has a variant of this StH genome. The other Hystrix species under study, i.e. H. longearistata, H. coreana and H. duthiei, contain an Ns basic genome, and most probably two variants of this basic genome, Ns
1
Ns
2
. The genus Hystrix is thus not a monophyletic group of species. 相似文献
11.
Thomas G. Lammers 《Brittonia》1998,50(2):233-262
Burmeistera, Centropogon, and Siphocampylus together comprise more than 500 species endemic to the Neotropics, Current knowledge of these genera is unsatisfactory, with
much diversity yet to be described. Over the past seven years, one out of every 28 specimens received for identification has
represented a new species, many characterized by unique or unusual character states. Siphocampylus smilax (Bolivia) is unique in the genus in its parallelodromous leaf venation and extra-floral nectaries. Centropogon dianae (Peru) cannot be accommodated in any recognized infrageneric taxon, and a new section, Centropogon sect. Niveopsis, is proposed for it. The flowers of C. steinii (Ecuador) are the smallest known in the genus, while C. connatilobatus (Venezuela) is the first species to combine arbusculiform pubescence and connate calyx lobes. Burmeistera venezuelensis is only the second species of the genus known to occur in Venezuela and the first to be endemic; similarly, Centropogon wilburii is only the third species of Centropogon known from Mexico and the first to be endemic to that country. Additional novelties are also described. 相似文献
12.
Galactia dimorphophylla, a new species from northeastern Argentina and northern Uruguay, is described and illustrated. This new species is assigned
to sect. Odonia. A table distinguishing it from similar species in Southern South America is presented, and its relationships and distinguishing
characters including karyological features are discussed. 相似文献
13.
14.
Eliana J. Noguera-Savelli F.-C. Germán Carnevali Gustavo A. Romero-González 《Brittonia》2008,60(3):240-244
A new species of Crossoglossa (Orchidaceae: Epidendroideae: Malaxideae), Crossoglossa acuminatissima, from Santander del Sur Department in Colombia, is described and illustrated, and its affinities are discussed. Malaxis tipuloides var. exigua is raised to the rank of species as Crossoglossa exigua, and its report from Venezuela constitutes the first record of the genus Crossoglossa in that country.
Resumen Se describe Crossoglossa acuminatissima de Santander del Sur en Colombia y se provee una ilustración y una discusión de sus afinidades. Malaxis tipuloides var. exigua se eleva al rango de especie como Crossoglossa exigua, y su reporte para Venezuela constituye el primer registro del género en ese país.相似文献
15.
J. Mark Egger 《Brittonia》2009,61(1):41-45
Castilleja exigua is described from an ample collection obtained in the Paramó de Guirigay, Monumento Natural Teta de Niquitao, Trujillo, Venezuela.
The new species is a member of subg. and sect. Castilleja. This apparently very rare species is known at present from a single, geographically restricted population and should be considered
globally endangered. 相似文献
16.
Daniel E. Atha 《Brittonia》2008,60(2):185-189
Acalypha gentlei is described, illustrated and mapped. The species is endemic to Belize and adjacent areas of Mexico and Guatemala and restricted
to semi-deciduous moist forests on limestone. The species is referred to Acalypha subgenus Linostachys.
Resumen Se describe, ilustra y grafica la distribución de Acalypha gentlei. Esta especie nueva es endémica a Belice y áreas adyacentes de México y Guatemala, y está restringida a bosques húmedos semi-deciduos sobre caliza. La especie es referida a Acalypha subgénero Linostachys.相似文献
17.
18.
Paola Pedraza-Peñalosa 《Brittonia》2008,60(1):1-10
Three new endemic species are described and illustrated from the floristically diverse western mountain ranges of Colombia.
Disterigma appendiculatum, D. hiatum, and D. verruculatum have interesting floral characters that are unique in the genus and in the Vaccinieae. These new morphological characters
and the terminology adopted for bracteoles and staminal appendages are briefly discussed. 相似文献
19.
The relationship between Litsea and related genera is currently unclear. Previous molecular studies on these taxa using cpDNA and nrITS were unable to produce
well-resolved phylogenetic trees. In this study, we explored the potential of the rpb2 gene as a source of molecular information to better resolve the phylogenetic analysis. Although rpb2 was believed to be a single-copy gene, our cloning results showed that most species examined possessed several copies of these sequences. However, the genetic distance
among copies from any one species was low, and these copies always formed monophyletic groups in our molecular trees. Our
phylogenetic analyses of rpb2 data resulted in better resolved tree topologies compared to those based on cpDNA or nrITS data. Our results show that monophyly
of the genus Litsea is supported only for section Litsea. As a genus, Litsea was shown to be polyphyletic. The genera Actinodaphne and Neolitsea were resolved as monophyletic groups in all analyses. They were also shown to be sisters and closer to the genus Lindera than to the genus Litsea. Our results also revealed that the genus Lindera is not a monophyletic group. 相似文献
20.
Karine Louise dos Santos Nivaldo Peroni Raymond Paul Guries Rubens Onofre Nodari 《Economic botany》2009,63(2):204-214
Traditional Knowledge and Management of
Feijoa (Acca sellowiana)
in Southern Brazil. This paper investigates traditional knowledge of the use and management of Acca sellowiana in southern Brazil. Fifty-six informants from three rural communities were assigned to one of four subgroups (“maintainers,”
“managers,” “cultivators,” or “users”) based on their responses regarding management and use of A. sellowiana. Traditional knowledge related to use of this species is widespread among rural residents, but traditional knowledge related
to management is fragmented depending on whether one uses, manages, or cultivates the species. Knowledge held in rural communities
suggests that A. sellowiana could play an expanded role in local economies as well as biodiversity conservation. We suggest that participatory research
could stimulate greater local use as well as on-farm conservation of A. sellowiana. 相似文献