Ecology and seed morphology of endemic species from Kerguelen Phytogeographic Zone

Polar Biology ◽  
1997 ◽  
Vol 18 (4) ◽  
pp. 229-235 ◽  
Author(s):  
Françoise Hennion ◽  
David W. H. Walton
Keyword(s):  
Endemic Species ◽  
Seed Morphology ◽  
Phytogeographic Zone

Seed germination of endemic species from Kerguelen phytogeographic zone

Polar Biology ◽  
1997 ◽  
Vol 17 (2) ◽  
pp. 180-187 ◽  
Author(s):  
Fran¸oise Hennion ◽  
D. W. H. Walton
Keyword(s):  
Seed Germination ◽  
Endemic Species ◽  
Phytogeographic Zone

Reproductive biology of Vaccinium cylindraceum (Ericaceae), an endemic species of the Azores archipelago

Botany ◽  
2008 ◽  
Vol 86 (4) ◽  
pp. 359-366 ◽  
Author(s):  
M. J. Pereira
Keyword(s):  
Reproductive Biology ◽  
Endemic Species ◽  
Seed Morphology ◽  
Minor Role ◽  
Style Length ◽  
Azores Archipelago ◽  
Floral Visitors ◽  
A Minor ◽  
Facultative Xenogamy ◽  
Maximum Differentiation

The reproductive biology of Vaccinium cylindraceum Smith, an endemic species confined to the islands of the Azores archipelago, was studied in populations from seven islands. Data indicate that the breeding system of the species is facultative xenogamy with spontaneous autogamy playing a minor role in fruit development. Stigma–anther distance was correlated with style length. Species of microlepidoptera were the most frequent floral visitors, and are possibly important pollinator taxa. Variation in flower, fruit, and seed morphology, as well as seed germination was significant among populations from the islands. The time each island has been available for colonization–evolution, as well as bird-assisted colonization of the Azores archipelago through transport of seeds from the South, likely play a role in floral and other characteristics of V. cylindraceum populations. The central group of islands is the centre of maximum differentiation of populations.

Triassic sponges (Sphinctozoa) from Hells Canyon, Oregon

1988 ◽  
Vol 62 (03) ◽  
pp. 419-423 ◽  
Author(s):  
Baba Senowbari-Daryan ◽  
George D. Stanley
Keyword(s):  
Endemic Species ◽  
Upper Triassic ◽  
Island Arc ◽  
Tropical Island ◽  
The Family ◽  
Wallowa Terrane ◽  
Unique Condition ◽  
Hells Canyon

Two Upper Triassic sphinctozoan sponges of the family Sebargasiidae were recovered from silicified residues collected in Hells Canyon, Oregon. These sponges areAmblysiphonellacf.A. steinmanni(Haas), known from the Tethys region, andColospongia whalenin. sp., an endemic species. The latter sponge was placed in the superfamily Porata by Seilacher (1962). The presence of well-preserved cribrate plates in this sponge, in addition to pores of the chamber walls, is a unique condition never before reported in any porate sphinctozoans. Aporate counterparts known primarily from the Triassic Alps have similar cribrate plates but lack the pores in the chamber walls. The sponges from Hells Canyon are associated with abundant bivalves and corals of marked Tethyan affinities and come from a displaced terrane known as the Wallowa Terrane. It was a tropical island arc, suspected to have paleogeographic relationships with Wrangellia; however, these sponges have not yet been found in any other Cordilleran terrane.

LM and SEM studies in seed morphology in someTephrosia PERS. (Leguminosae)

1992 ◽  
Vol 103 (5-6) ◽  
pp. 339-343
Author(s):  
J. V. Subba Rao ◽  
S. R. Shanmukha Rao
Keyword(s):  
Seed Morphology ◽  
Sem Studies

Evaluation of the essential oil composition of fruits of three endemic species of Tornabenea from Cape Verde Islands

Planta Medica ◽  
2009 ◽  
Vol 75 (09) ◽  
Author(s):  
C Grosso ◽  
G Teixeira ◽  
I Gomes ◽  
ES Martins ◽  
JG Barroso ◽  
...  
Keyword(s):  
Essential Oil ◽  
Endemic Species ◽  
Essential Oil Composition ◽  
Cape Verde ◽  
Oil Composition ◽  
Cape Verde Islands

Secondary metabolites from the aerial parts of Stachys tetragona, a Greek endemic species

Planta Medica ◽  
2012 ◽  
Vol 78 (11) ◽  
Author(s):  
A Afouxenidi ◽  
T Milošević-Ifantis ◽  
H Skaltsa
Keyword(s):  
Secondary Metabolites ◽  
Endemic Species ◽  
Aerial Parts

Morphology and Affinities of Ampelocissites Seeds (Vitaceae: Ampelopsis clade) from the Paleogene of Texas, USA

2020 ◽  
Vol 45 (3) ◽  
pp. 478-482
Author(s):  
Steven R. Manchester
Keyword(s):  
Computed Tomography ◽  
Cross Sections ◽  
Seed Coat ◽  
Ct Scanning ◽  
Seed Morphology ◽  
Early Eocene ◽  
Micro Computed Tomography ◽  
X Ray ◽  
Fossil Seeds ◽  
Fossil Genus

Abstract—The type material on which the fossil genus name Ampelocissites was established in 1929 has been reexamined with the aid of X-ray micro-computed tomography (μ-CT) scanning and compared with seeds of extant taxa to assess the relationships of these fossils within the grape family, Vitaceae. The specimens were collected from a sandstone of late Paleocene or early Eocene age. Although originally inferred by Berry to be intermediate in morphology between Ampelocissus and Vitis, the newly revealed details of seed morphology indicate that these seeds represent instead the Ampelopsis clade. Digital cross sections show that the seed coat maintains its thickness over the external surfaces, but diminishes quickly in the ventral infolds. This feature, along with the elliptical chalaza and lack of an apical groove, indicate that Ampelocissites lytlensis Berry probably represents Ampelopsis or Nekemias (rather than Ampelocissus or Vitis) and that the generic name Ampelocissites may be useful for fossil seeds with morphology consistent with the Ampelopsis clade that lack sufficient characters to specify placement within one of these extant genera.

Rediscovery and lectotypification of the Philippine endemic Hornstedtia microcheila Ridl. (Zingiberaceae) including an amendment to its description

2017 ◽  
Vol 11 (2) ◽  
Keyword(s):  
Endemic Species ◽  
The Philippines ◽  
Distribution Data ◽  
Taxonomic Key

Hornstedtia microcheila Ridl. (Zingiberaceae; Alpinioidieae; Alpinieae) is a poorly-known endemic species in the Philippines. It has not been collected again since its description in 1909. In 2017, however, the species was rediscovered in the Mt. Mandalagan Range, Patag, Silay City, Negros Occidental, after a lapse of over a century. A new, amended and extended description of H. microcheila based on this new collection is presented herein. Typification, colour photographs, distribution data, ecological details as well as a taxonomic key to the different Hornstedtia species in the Philippines are also provided.

Sign in / Sign up

Export Citation Format

Share Document