Photograph of a Russian thistle (Salsola Kali), or Ink weed, growing in the Colorado Desert, Imperial Valley, California, ca.1910. "So called because when thrashed it stains wheat black". The large bush of Russian thistle resembles a dark cloud at center in a sea of sand. The plant is an indiscernible cluster of thin, stiff stems. Similar plants can be seen in the background.Photograph of a Russian thistle (Salsola Kali), or Ink weed, growing in the Colorado Desert, Imperial Valley, California, ca.1910. "So called because when thrashed it stains wheat black". The large bush of Russian thistle resembles a dark cloud at center in a sea of sand. The plant is an indiscernible cluster of thin, stiff stems. Similar plants can be seen in the background.