"In between" fossils for some point species on its own, sometime for million years. Humans, monkeys, and other primates share common ancestry. Darwin did not know that because in the 19th century lacked understanding evolution as we have it today. Today we know that human race came from various migration pattern of primates from Eastern Africa. Back during Darwin era, the science did not know DNA nor molecular biology. They did not know that humans and neanderthal coexist and even interbreed. What we see as today in human species is a result of process that started 2.2 million years ago. We as people happened to win in the process around 70,000 due bottleneck pressure which was result of Toba volcanic explosion. However, this was not only the genetic bottleneck in the human's past, nor it affected only people. Similar bottleneck pressure around the same timeframe affected other large mamals.
As a vivid gardener, I know that evolution happened in vegetation and can detected by tracing original ancestry of present trees and shrubs. Look into apple tree which originated in Central Asia. The DNA analysis showed that all present apple trees can be detected to one region in the world, from there they were cultivated and distributed world wide. It was a process that took about 7000 years. This altered a behavior of bees, aphids, fungus, and bacteria that need apple fruit. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2684696/pdf/rspb20090355.pdf
The same process affected all flora, especially after the last Ice Age. You can still go to various spruce parks around USA Eastern coast that are the leftover the glaciation. In northern hemisphere due extensive knowledge of glaciation we can trace ancestry of many flora that were left from interglaciation period and how they differed from ancestral plants. Some of the flora evolved so much that cannot even hybrid together from its ancestral plant. As the flora evolved, so did births, insects, fungus, and bacteria.
Genesis is myth where according to it plants appeared on the third day yet sun was created on the fourth day. How plants made photosynthesis without sun?