Fourth summary of the native seed germination studies of Norman C Deno: species with names beginning with letters L through O

Norman C Deno was a renowned professor of chemistry at Penn State University and an avid amateur horticulturist with interest in seed germination. Dr Deno conducted germination research on plant species derived from 150 families, 800 genera, and 2500 species. He studied the effects of temperature, oscillations in temperature, light, storage conditions, seed age, outside exposure during cold months, and treatment with GA3. He worked with species collected worldwide. Over a period of many years, he self-published several books derived from notes based on his research. A series of monographs have been prepared for the Native Plants Journal that provide a summary of Dr Deno's research reports for plants native to Canada, the United States, and Mexico. This fourth article is inclusive of species with taxonomic binomials beginning with the letters L through O.