high degree of self-scrutiny. Often they were intended to mark important periods in his life; for example, the mid-1887 Paris series were painted at the point where he became aware of Claude Monet, Paul Cézanne and Signac. In Self-Portrait with Grey Felt Hat, heavy strains of paint spread outwards across the canvas. It is one of his most renowned self-portraits of that period, "with its highly organized rhythmic brushstrokes, and the novel halo derived from the Neo-impressionist repertoire was what Van Gogh himself called a 'purposeful' canvas". They contain a wide array of physiognomical representations. Van Gogh's mental and physical condition is usually apparent; he may appear unkempt, unshaven or with a neglected beard, with deeply sunken eyes, a weak jaw, or having lost teeth. Some show him with full lips, a long face or prominent skull, or sharpened, alert features. His hair is sometimes depicted in a vibrant reddish hue and at other times ash colored. Van Gogh's self-portraits vary stylistically. In those painted after December 1888, the strong contrast of vivid colors highlight the haggard pallor of his skin. Some depict the artist with a beard, others without. He can be seen with bandages in portraits executed just after he mutilated his ear. In only a few does he depict himself as a painter. Those painted in Saint-Rémy show the head from the right, the side opposite his damaged ear, as he painted himself reflected in his mirror. Flowers Van Gogh painted several landscapes with flowers, including roses, lilacs, irises, and sunflowers. Some reflect his interests in the language of colour, and also in Japanese ukiyo-e. There are two series of dying sunflowers. The first was painted in Paris in 1887 and shows flowers lying on the ground. The second set was completed a year later in Arles and is of bouquets in a vase positioned in early morning light. Both are built from thickly layered paintwork, which, according to the London National Gallery, evoke the "texture of the seed-heads". In these series, Van Gogh was not preoccupied by his usual interest in filling his paintings with subjectivity and emotion; rather, the two series are intended to display his technical skill and working methods to Gauguin, who was about to visit. The 1888 paintings were created during a rare period of optimism for the artist. Vincent wrote to Theo in August 1888: "I'm painting with the gusto of