The smooth pewter of American beech tree trunks is contrasted by the bleached wheat of their marcescent
winter leaves all along the Rock Creek Parkway, where they are admired by D.
Taxonomic peculiarities of marcescent oaks (Quercus, Fagaceae) in southern Portugal
Some recent works about marcescent groves and other types of vegetation (VILA-VICOSA & al, 2012; AGUIAR & al, 2013) in Southern Portugal, highlight the necessity to clarify taxonomic cases, such as stabilized hybrids, new taxa and sintaxonomic groups with floristic particularities, where these forest types emerge as characteristic mature stages of typically Sub-Mediterranean ecotones, marking the transition between Temperate bioclimate and those genuinely Mediterranean (RIVAS-MARTINEZ, 2007; GAVILAN & al, 2011; SCIANDRELLO & al, 2013; VILCHES & al, 2013).
Leaves pinnate, caducous or marcescent
, sheath, petiole and rachis spiny and covered with an appressed hairy-scaly indument, blade irregularly divided in multifold or single and multifold segments intermixed, with a white indument abaxially, plication reduplicate.
His abduction of the frail, laudanum over-dosed and addicted, forty-year-old, marcescent
spinster of Wimpole Street was his apogee, and it has been so ceaselessly replicated theatrically and filmically as to have become a virtual folkloric stereotype.
ABSTRACT: Presence of marcescent
leaves during winter is a common phenomenon in northern-temperate deciduous forests across the Holarctic, but the ecological significance of marcescence on woody vegetation has received little attention.
There are, on the one hand, soils that exist in the transition zones between the deciduous forests and the sub-Mediterranean marcescent
forests of southern Europe (for example, those of deciduous Pyrenean oak [Quercus pyrenaica] or semi-evergreen Lusitanian or Portuguese oak [Q.
The distribution of the marcescent
Pyrenean oak on the Iberian Peninsula is concentrated mainly in sites with a sub-Mediterranean climate (moderate or compensated summer drought) in the northwest.
Further south, between northern Mexico and the Nicaragua Depression, there is a large mountainous area with vegetation dominated by a forest of pines (Pinus) and oaks (Quercus, including marcescent
or deciduous species), as well as some more northerly conifers, such as oyamel (Abies religiosa, Pinaceae); cypresses (Cupressus); junipers (Juniperus, Cupres-saceae); Picea and Pseudotsuga (pinabetes).