Results 71 to 80 of about 2,592 (162)

[New species of Dennstaedtia (Filicales: Dennstaedtiaceae) to Mexico].

open access: yesRevista de biologia tropical, 2003
Dennstaedtia gracilis A. Rojas et Tejero (Dennstaedtiaceae) is herein described and illustrated as a new species endemic to Mexico. Its belongs to the group of winged adaxial secondary costae species but it differs by the combination of characters as smaller fronds, deltate pinnules and lobed segment apex.
Alexander Fco, Rojas-Alvarado   +1 more
openaire   +1 more source

Prescribed fire effects on groundcover vegetation over time. [PDF]

open access: yes, 2011
General EcologyThe students and researchers at UMBS have a long history of performing succession-themed studies in the Station's experimental burn plots. This project focused on how post-fire succession has affected current plot groundcover diversity and
Johns, Stefania M.   +2 more
core  

Nomenklatorisch-taxonomische Änderungen in der 16. Auflage der von W. Rothmaler begründeten Exkursionsflora von Deutschland [PDF]

open access: yes, 2012
1996 ist die 16. Auflage des zweiten Bandes der Exkursionsflora erschienen (ROTHMALER 1996). Verschiedene Kapitel dieses Bandes wurden umfassend überarbeitet oder neu erstellt. Zahlreiche für Deutschland neue Arten wurden aufgenommen und in die Schlüssel
Braun, Uwe
core  

Una especie nueva de Dennstaedtia (Filicales: Dennstaedtiaceae) para México

open access: yesRevista de Biología Tropical, 2002
Dennstaedtia gracilis A. Rojas et Tejero (Dennstaedtiaceae) es aquí descrita e ilustrada como una especie nueva endémica de México. Pertenece al grupo de especies que presentan un ala dorsal en la costa de las pínnulas pero difiere por la combinación de caracteres como hojas más pequeñas, rizoma delgado, pínnulas deltado-lanceoladas y ápice de los ...
Rojas-Alvarado, Alexander Fco.   +1 more
openaire   +3 more sources

New evidence of the emergence of the East Asian monsoon in the early Palaeogene. [PDF]

open access: yesSci Rep, 2022
Su LF   +5 more
europepmc   +1 more source

Wallum on the Nabiac Pleistocene barriers, lower North Coast of New South Wales [PDF]

open access: yes, 2013
Wallum is widespread on coastal dunefields, beach ridge plains and associated sandy flats in northern NSW and southern Queensland. These sand masses contain large aquifers, and the wallum ecosystem is considered to be generally groundwater-dependent ...
Griffith, Stephen J., Wilson, R.
core  

Fase sexual de los helechos Odontosoria schlechtendalii y Odontosoria scandens (Dennstaedtiaceae)

open access: yesRevista de Biología Tropical, 2003
Los resultados de los estudios sobre morfogénesis de la fase sexual de Odontosoria schlechtendalii y O. scandens son presentados en este trabajo. En O. schechlechtendalii y O. scandens las esporas son triletes, no clorofílicas, carecen de perina, la exina es lisa, ligeramente granulada a retuculata y la germinación es tipo Vittaria.
Granados, Beatriz   +2 more
openaire   +4 more sources

Le Pteridofite europee: la loro tassonomia e nomenclatura oggi [PDF]

open access: yes
Gli pteridologi sono tutt'ora in grande disaccordo circa la tassonomia e nomenclatura di alcune famiglie, generi e specie delle Pteridophyta. Esso riguarda anche alcune felci e gruppi affini dell'Europa.
Pichi Sermolli, Rodolfo Emilio Giuseppe
core  

Free Axial Lobes: An Important Diagnostic Character in Pteridium (Dennstaedtiaceae)

open access: yesTelopea, 2016
The overall form of the lamina in the bracken fern (Pteridium) is a fractal series in which blade, pinnae, pinnules and pinnulets represent a hierarchy of repeated units of decreasing size. Distinctive lunate or semi-lunate lobes of laminal tissue between the divisions of the blade in an apical zone of some or all of its axes are an important ...
openaire   +1 more source

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