RFEW9N6F–Involucre, vintage engraved illustration. Dictionary of words and things - Larive and Fleury - 1895.
RFKGP5EE–This image represents the internal structure of the Jupiter planet. It is a realistic 3d rendering
RF2GP8KRK–Wild beaked hazelnut involucre hangs from a branch.
RF2EP2831–Macro of a pair of Rough Cocklebur heads (Xanthium strumarium) as seen in winter. Raleigh, North Carolina.
RF2J3A2JK–Spider Eating Bee
RFH0GXR3–Close up of bottom of sunflower, showing details -hairs, stem,bracts, involucre, etc
RF2EKX1AE–Wild beaked hazelnut involucre hangs from a branch
RM2M0TD04–France, Indre et Loire, Ch?digny, village labeled remarkable garden, priest's garden, the presbytery garden brings together several varieties of perennials and annuals decorative medicinal aromatic shrubs and fruit trees, Involucre sage Bethellii
RMC5KN12–Pedals to involucre, Arid Machaeranthera, Death Valley, CA
RMF3J6P8–Hazel, Corylus avellana, nuts maturing on wild trees in summer, August, Berkshire
RMKM12WY–Large clump of Canadian dwarf cornel, Cornus canadensis, in full flower. Newfoundland.
RM2G03E98–Detail Showing Nectar Glands in the Cyathia or Bracteoles of Mediterranean Spurge, aka Albanian Spurge, Euphorbia characias
RM2H0CBME–Loose hazelnut, fruits of the hazelnut tree (Corylus avellana) stripped of their involucre, Lot-et-Garonne, France
RF2AHBE1N–Sow Thistle Involucres in Springtime
RF2G19300–Macro, Pale yellow petals, brown inner petals, beautiful Gazania Daisy Flower surrounded by wiry green involucre bracts, opening. Blue green
RMBE3E98–Hazelnuts of a Turkish Hazel tree (Corylus colurna) wrapped in their involucre. Noisettes de coudrier dans leur involucre.