Results 131 to 140 of about 37,606 (249)

Not plants or animals: a brief history of the origin of Kingdoms Protozoa, Protista and Protoctista [PDF]

open access: yes, 2010
In the wake of Darwin’s evolutionary ideas, mid-nineteenth century naturalists realized the shortcomings of the long established two-kingdom system of organismal classification. Placement in a natural scheme of Protozoa, Protophyta, Phytozoa and Bacteria,
Joseph M. Scamardella
core   +2 more sources

Plantae Colombianae, V: Species nova generis Herrania Plantae Colombianae, V: Species nova generis Herrania

open access: yesCaldasia, 1943
Recently, señor Gabriel Gutiérrez, Agrónomo Auxiliar de la Sección de Biología Vegetal, kindly submitted to me for study a collection of Herrania from Santander. It represents an interesting new species, the description of which is presented below.
Schultes Richard Evans
doaj  

Plantae Colombianae,X: I.-De Euphorbiaceis notae diversae Plantae Colombianae,X: I.-De Euphorbiaceis notae diversae

open access: yesCaldasia, 1945
Cunuria Spruceana / Hevea guianensis / Hevea viridis / Senefeldera chiribiquetensis / Saurauia brachybotrys / Saurauia chortophylla /  Saurauia floccifera / Saurauia parviflora / Saurauia pseudoleucocarpa / Saurauia pycnotricha / Saurauia Smithiana ...
Schultes Richard Evans
doaj  

Plantas Invasoras

open access: yes, 2009
As invasións biolóxicas constitúen unha das ameazas máis serias para a conservación da biodiversidade no ámbito do cambio global que está a experimentar o planeta. A introdución e aclimatación de especies en territorios alleos non é unha novidade na historia, xa que tivo lugar polo menos dende os comezos da agricultura.
openaire   +1 more source

Plantae Austro-Americanae, II: De investigationibus generis Herrania diversae observationes Plantae Austro-Americanae, II: De investigationibus generis Herrania diversae observationes

open access: yesCaldasia, 1944
The following observations are presented as a result of revisionary studies in the sterculiaceous genus Herrania. The following observations are presented as a result of revisionary studies in the sterculiaceous genus Herrania.
Schultes Richard Evans
doaj  

Plantas falsas

open access: yes, 1987
Se aportan nuevos datos sobre la presencia en los herbarios del Institut Botánic de Barcelona (BC) y del Conservatoire et Jardín Botaniques de la Ville de Genéve (G) de unos pliegos con localidad falsa, pertenecientes a unos exsiccata distribuidos por E. M. Reineck.
openaire   +1 more source

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