-
-
Trembling Aspen (Populus tremuloides) in their autumn glory
-
Populus tremuloidesquaking aspen. The U. S. Forest Service believes that quaking aspen has the widest range of any North American tree, extending from Newfoundland to the tree line in Alaska and south to Virginia and Arizona. "It propagates itself primarily through root sprouts, and extensive clonal colonies are common. Each colony is its own clone, and all trees in the clone have identical characteristics and share a single root structure. A clone may turn color earlier or later in the fall than its neighbouring aspen clones," Wikipedia "Populus tremuloides". Aspens quake because the petiole is flat and attached to the flat leaf at a 90 degree angle. the configuration causes the leaves to flutter in the wind. It is a characteristic shared with other Populus species.
-
Orinda, California, United States
-
Florissant, Colorado, United States
-
Orinda, California, United States
-
Populus tremuloides Michx.Most commonly Quaking Aspen leaves turn green-yellow, then yellow (often a vivid/bright yellow or gold-colored - so often described as "golden" - as in the lower right hand corner of the picture above in the background) and then the leaves fall. At one time clones that turned a vivid yellow or gold in autumn were recognized as P. tremuloides var. aurea.Sometimes there is a hint of orange-red. And, less often, the leaves can be almost red as above.Sept. 27, 2012, Brighton, Utah, elev. 8,760 ft.
-
2011-02-27 Lower Austria, district Schwechat (Schwechat-Au, 150 m AMSL).The floods did not break this particular tree but they still caused havoc here.German name: Schwarz-Pappel
-
2010-03-28 Lower Austria, district Bruck/Leitha (Steingschirr, 190 m AMSL).Flower, male - background: stem/bark.German name: Schwarz-Pappel
-
-
2011-08-07 Vienna XXII. district - Lobau heath, bushfire place (155 msm Quadrant 7864/2).Black poplar, already growing new shoots, so obviously on this place damage was only superficial.
About the bushfire see remarks here.
-
2010-05-14 Lower Austria, district Bruck/Leitha (Steingschirr, 190 m AMSL).Ripe seed capsules, cracking.German name: Schwarz-Pappel
-
Klein-Neusiedl, Niedersterreich, sterreich
-
2010.04.13 Austria, Vienna XXII. district (160 m AMSL).Young leaves.Very common.German name: Schwarzpappel
-
2010-03-28 Lower Austria, district Bruck/Leitha (Steingschirr, 190 m AMSL).Flower, male.German name: Schwarz-Pappel
-
2010-05-14 Lower Austria, district Bruck/Leitha (Steingschirr, 190 m AMSL).Seed capsules almost ripe - about to crack.German name: Schwarz-Pappel
-
2011-10-21 Lower Austria, district Schwechat (160 msm Quadrant 7865/1).Native to the habitat (and typical in habitus here) but possibly planted here, as the habitat is man-made:This is the "new" river bed of Schwechat river - the river once flew further west (crossing over to nearby Vienna); when A4 motorway was built the old river bed was cut off and so-called "Kalter Gang" (an old mill stream - side canal of old Schwechat river) was expanded to what is now lower Schwechat river bed. Of course, Populus nigra also could have conquered the new habitat without any help by humans.
-
2010-05-14 Lower Austria, district Bruck/Leitha (Steingschirr, 190 m AMSL).Seed capsules almost ripe - shortly before cracking.German name: Schwarz-Pappel
-
People cut down several giant old poplars which produced a bumper crop of early morels (Verpa bohemica) each year, and there were several chunks of their trunks left in the place. I took these pictures. I hope that these magnificent trees will live on there as root clones.
-
2010-03-28 Lower Austria, district Bruck/Leitha (Steingschirr, 190 m AMSL).Flower, female.German name: Schwarz-Pappel
-
2011-02-12 Vienna XXII. district (Lobau national park - Heisslnde = heath, 155 m AMSL).Characteristic aspect of poplar bush heath in Lobau.German name: Schwarz-Pappel
-
2009.11.01: Austria, Lower Austria (district Bruck/Leitha, 185 m AMSL): habitus, cultivated.The variety growing in pyramidal shape is preferred for parks and avenues; here they're planted in a ring around the circle of the Roman Amphitheatre of Carnuntum (Petronell). The leaves in the foreground also are from P. nigra.German name: Schwarzpappel
-
2011-03-20 Lower Austria, district Bruck/Leitha (temporarily flooded meadow at Danube river - outside of national park territory; 140 msm Quadrant 7867/2).Just beginning to flower.German name: Silber-Pappel
-
Zaragoza: Aragn (Espaa)Amentos masculinos. Familia: SALICACEAEDistribucin: Se distribuye por el C y S de Europa, W de Asia y N de Africa; introducida en otros pases de Europa, Macaronesia y Amrica del N, etc.; casi toda la Pennsula Ibrica, salvo en algunas zonas de Galicia, Cornisa Cantbrica y Baleares; se reparte por todo Aragn, aunque parece ms raro en la mitad N.Tamao y tipo de poblaciones (gregarismo): Puede formar alamedas, aunque ms frecuentemente aparece mezclado con otras especies, salpicando los bosques de ribera.Hbitat: Crece en mrgenes de ros, barrancos y otras masas de agua, ya sea formando densas alamedas o, con ms frecuencia, interviniendo en bosques ribereos formados por diversas especies: Populus nigra, Salix alba, Fraxinus angustifolia, etc.Preferencia edfica: Indiferente Rango altitudinal: 80- 1120 ( 1300 ) m Floracin: Marzo - AbrilFructificacin: Mayo - JunioForma Biolgica: Macrofanerfito caducifolioExtractado del Atlas de la Flora de Aragn (Herbario de Jaca)
