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CentaureaA sign of spring: Forsythiaburst of buds of a flowering quince in springburst of buds of a flowering quince Buds of a flowering quince in springflowering quince in springScotch adhesive tape rollerPlastic ruler with polarising filterPlastic ruler and ballpoint penHalogen bulb lamp standard H4 75/70 WHalogen bulb lamp H4 75/70 Wcomputer chip made by MUPID (1980ies)Burdock in fallBurdock in fall - detailBurdock in fall - curved thornsBurdock (Arctium lappa) in fall - detailThistle (Carduoidea) - PappusThistle (Carduoidea) -  PappusThistle (Carduoidea) -  feathery pappus hairsBloom of aThistle (Carduoidea) with floral backgroundThistle (Carduus acanthoides) - bloom with pollen, picture detail: 10 x 6.6 mmThistle (Carduus acanthoides) - a composite with wonderful bloomThistle (Carduus acanthoides) - general view with LM macroscope 9x and fullframe cameraSunflower (Helianthus annuus) under ultraviolet lightSunflower (Helianthus annuus) under the LM macroscope with ultraviolet lightSunflower (Helianthus annuus) - some of the 15.000 single bloomsSunflower (Helianthus annuus) - single bloom Sunflower (Helianthus annuus) - bloom with pollenSunflower (Helianthus annuus) - detailSunflower (Helianthus annuus) - general viewChestnut - detail hairy tipChestnut pointed end with a small tuft of hairs and an attachment scarChestnut with burrsFrame of a leave under the polarisation microscopeHalogen bulb lamp 12V 20WWalnutArtfully presented antique jewelleryAntique jewellery Gear wheel in an old, mechanical clockworkOld, mechanical clockworkOld, mechanical swiss clockworkOld, mechanical clockwork with rustPoppy capsule (Papaver rhoeas)Moth - detail: face with trunkMothMoth - detail: headPollen of an echinacea purpurea flower adhere to honeybee (Apis)Honeybee (Apis) on an echinacea purpurea flower with pollenHoneybee (Apis) on an echinacea purpurea flowerBee on flowerBristlegrass (Arctium lappa) in detailBristlegrass (Arctium lappa)