Results 101 to 110 of about 4,482 (197)

Application of palynological techniques for correlation of coal seams in the Lower Lignite Creek area, Nenana Coal Field [PDF]

open access: yes, 1980
This study concerns spores and pollen in the coals of the lower Lignite Creek area in the Nenana Coal Field, which is operated by Usibelli Mining Company.
McFarlane, R., Sanders, R., and Rao, P.D.
core  

Carnivorous plants [PDF]

open access: yes, 2010
Biljke mesožderke su izuzeci u biljnom svijetu. Imaju biljne organe i životni ciklus kao i svaka druga vrsta. Imaju listove, cvijetove i klorofil koji im daje zelenu boju.
Jelačić, Tihana
core   +2 more sources

Clethraceas argentinas

open access: yesLilloa, 1960
El autor considera la familia Clethraceae en su conjunto, dando la distribución geográfica en América del Sur. Se agregan claves y descripciones para las especies argentinas y se describe una nueva especie, Clethra maromensis, de la provincia de Salta.
M. Villa Carenzo
doaj  

Elaiophores: their taxonomic distribution, morphology and functions

open access: yesActa Botânica Brasílica
Elaiophores are floral glands that secrete non-volatile oils as a reward for their pollinators. Their secretions mediate a specialized interaction between oil-producing plants and a few species of oil-collecting bees - Apidae and Melittidae.
Clivia Carolina Fiorilo Possobom   +1 more
doaj   +1 more source

Holocene Vegetation, Climate, and Carbon History on Western Kodiak Island, Alaska [PDF]

open access: yes
At Phalarope Pond, western Kodiak Island, a multidisciplinary study using pollen and spores, macrofossils, stable isotopes, and carbon accumulation provides the Holocene vegetation and climate history following the deglaciation that began over 16,000 cal
Mann, Daniel H.   +2 more
core   +1 more source

Adaptations of succulent plants for survival in desert ecosystems [PDF]

open access: yes, 2019
Cilj ovog seminara bio je nabrojati prilagodbe sukulentnih biljaka koje su im nužne za preživljavanje u pustinjskim ekosustavima. Sukulenti su biljke koje imaju posebne morfološke i ekofiziološke prilagodbe za pojačano primanje i pohranu vode.
Penzar, Marta
core   +2 more sources

Responses of generalist invertebrate predators to pupal densities of autumnal and winter moths under field conditions [PDF]

open access: yes, 2013
1. Generalist natural enemies are usually not considered as being capable of causing population cycles in forest insects, but they may influence the population dynamics of their prey in the low density cycle phase when specialist enemies are largely ...
Ammunét, Tea   +3 more
core  

Pouteria (Sapotaceae) na Estação Biológica de Santa Lúcia, ES, Brasil

open access: yesRodriguésia
Resumo Sapotaceae (Ericales) é uma família pantropical com 58 gêneros e cerca de 1.250 espécies sendo Pouteria o gênero mais rico com aproximadamente 200 espécies. No Brasil são registradas 124 espécies, das quais 52 são endêmicas.
Arnaldo Zanetti Mônico   +1 more
doaj   +1 more source

La formation d'Herzeele: un nouveau stratotype du pleistocene moyen marin de la mer du Nord [PDF]

open access: yes, 1978
The Herzeele Brickyard (Northern France) offers a permanently well exposed outcrop of continental and marine deposits which are reaching a total thickness of 6 m and are overlying the Ypresian clay of eocene age, occuring at about 8 m N.G.F.Three marine ...
Baeteman, C.   +11 more
core  

Una nueva especie de Souroubea (Marcgraviaceae, Ericales) de Colombia

open access: yesRevista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales
Se describe e ilustra una nueva especie de Souroubea Aubl. de Colombia, la cual se reconoce fácilmente por sus nectarios reproductivos pedicelares blancos y por sus glándulas laminales conspicuas en ambas caras de las hojas. La nueva especie se conoce únicamente en una pequeña área andina de la vertiente amazónica del departamento de Caquetá.
Diego Giraldo-Cañas   +2 more
openaire   +1 more source

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