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Yellow catkins -- strands of flower clusters with seeds and pollen -- growing from Triadica sebifera, a Chinese tallow tree (also known as a Florida aspen or candleberry tree).
Close-up photo of green mature leaves and red tiny new leaves on the branches of a young uncultivated Eucalyptus tree in the countryside near Mudgee, NSW in Summer. Soft focus wilderness background.
Celtis australis with fungal disease. European nettle tree with many dark spots on leaves against blue sky
Eucalyptus tree against a deciduous tree background in a garden in autumn. England, United Kingdom
The focus is on the front.
Squash preparation of  onion root tip cells stained to reveal chromosomes,  Bright field illumination, light microscopy.  This image was taken with the X40 objective lens.  Depth of focus is extremely low at this magnification.  Smaller apertures give greater depth of focus, but image quality deteriorates and resolution is greatly reduced.  The aperture in this image was optimised for contrast and resolution. Chromatic abberation is inevitable in light microscopy, but has been kept to a minimum in this image.
Old dried up spruce crown against a white cloud sky. High resolution photo.
Hemlock woolly adelgid (HWA) infestation on underside of eastern hemlock branch in Connecticut. This tiny sapsucking insect from Asia, discovered in Virginia in 1951, is a major killer of eastern hemlocks, which are vitally important to Northeastern forest ecosystems. HWA is named for its woolly egg masses. Thanks to introduction of the Japanese ladybeetle, a predator of HWA, many hemlocks in Connecticut have survived since the first waves of tree mortality some 35 years ago.
spring landscape in the morning in the town of Vaciamadrid near Madrid, Spain
Collection of durian fruit
Close up of Melaleuca quinquenervia flower on blur background. (Scientific name Melaleuca quinquenervia (Cav.) S.T.Blake)
Acacia Shrub at Etosha National Park in Kunene Region, Namibia
Monkeypox virus is a poxvirus transmitted to humans from monkeys which is treated with the smallpox vaccine antivirals, and vaccinia immune globulin 3d rendering
A Kanuka (Kunzea ericoides) Tea Tree in full frame close-up. Although kanuka honey is not as well-known internationally as manuka, it actually contains more of the antiseptic properties than manuka, just not measurable as UMF. Kanuka honey's antibacterial and anti-inflammatory properties could be even stronger than Manuka. Kanuka honey's antimicrobial and anti-inflammatory properties could make it especially helpful in healing burns, bruises, and other wounds.
Restricted distribution in Ravensthorpe Range in southern Western Australia
plant Pine Young Staminate Cone L.S. under light mircoscope with white background
Fraxinus excelsior
Several immature seed pods of the introduced Blue Gum (Eucalyptus globulus), a commercial forestry species used for lumbar, growing in central Chile. Worldwide this is the most exploited Eucalyptus in the forestry industry, with rapid growth yielding large trees within just a few years. In Chile the winter-flowering and nectar-rich flowers provide an unexpected food bounty for any wintering hummingbirds, which can always be found among its dense foliage.
Walnuts blossoms tree in spring light garden close up. Closeup Juglans regia blooming branch by blurry blue sky background. Male flowers and young leaves growing in park, selective focus
Squash preparation of stained onion root tip cells showing various stages of mitosis. Differential interference contrast optics on a Leica microscope, Image taken with the X40 objective lens.  Depth of focus is extremely shallow (just a few microns).  Differential interference contrast results in an optical slice horizontally through the specimen providing maximum possible resolution at this magnification and good contrast. Chromatic abberation is inevitable in light microscopy, but has been kept to a minimum in this image.
Close-up of Mimosa bimucronata flower
Heather Plant,  scan of a Vintage Photo
Nogal brotes de las flores que generan las nueces, en primavera
Blooming Tilia branches close up
View of a tree branch covered in white cotton-like seeds hanging over the pebble beach of a river bank with the shallow river in the background
Close-up of eucalyptus leaves
buttonbush, common buttonbush, button willow, honey bells, Cephalanthus occidentalis
ripening mulberry on a tree
Eucalyptus branch with white flowers in Sydney, Australia
Vertical extreme closeup photo of green leaves, buds and white flowers growing on a Tea Tree bush in Summer. Armidale, New England high country, NSW. Soft focus background.
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