Hendrik Floris Verster (9 June 1861 - Leiden , 21 January 1927) was a Dutch painter.
Verster came from an artistic family. His father, Abraham Florentius Verster, was an administrator of the National Museum of Natural History in Leiden and a renowned scholar and painter of birds. His younger brother Cees developed into an art critic and later a curator of the Stedelijk Museum in Leiden. Hendrik took drawing lessons from Gerardus Johannes Bos and in the winter of 1878-79 he had lessons from George Hendrik Breitner when he briefly worked as a lecturer in Leiden. Between 1880 and 1884 Verster continued his training at the Royal Academy of Art in The Hague where some of his fellow students were George Hendrik Breitner, Isaac Israels and Willem de Zwart. After graduation, he briefly attended classes at Amedee Bourson in Brussels.
From 1882-1892 he shared a studio in Leiden with his brother, the still-life painter Kamerlingh Onnes. Until about 1885 he worked in the style of the Hague School. The next seven years he experimented in still life painting under the influence of his brother and French painters Antoine Vollon and Théodule Ribot. As a colorist he excelled, his passionate color vision differed from the Hague School style.
In Brussels he met Jan Toorop and other members of the avant-garde artists' group Les Vingt. Partly under their influence Verster began working with a rough brush strokes and intense colors. He gained success with his large and exuberant works of floral still lifes and landscapes. In 1891 he took part in the salon of Les XX in Brussels.
Between 1892 and 1900 he underwent a metamorphosis in which his work was almost entirely devoted to drawings in crayons with serene subjects. From 1900 he began to paint and he was a celebrated artist in the Netherlands. The major collections of his works are in the Kröller-Müller Museum and the Stedelijk Museum De Lakenhal in Leiden.