Morin, N. Taxonomic changes in North American Campanuloideae (Campanulaceae). ​​Phytoneuron (2020). 49:1-46

If you think that all plant species have already been discovered and named, think again. Even in our own backyard, scientists are continuing to uncover evidence that re-shapes our understanding of plant diversity.

As a recent example pertinent to our California flora, we have taxonomic work of Dr. Nancy Morin, a researcher with the UC and Jepson Herbaria. While working on the Flora of North America, Morin noticed that one particular group of bellflowers, the genus Campanula, appeared to consist of many species that may not be as closely related as scientists may have once thought. Thus, she embarked on a journey of taxonomic revision, the gathering and re-examination of evidence used to delineate and describe species.

Re-defining species is an enormous task, requiring the researcher to gather data of many kinds. To decide the boundaries of the species and characteristics that define then, Dr. Morin had to gather distributional data (where the plant lives), ecological data (the environments in which the plant is found), morphological data (what the plant looks like), historical data (how the plant has previously been named or described), and often, genetic data (the species' DNA). Fortunately, herbarium specimens represent many of these data types, and as more historical records are digitized and imaged, Morin had access to an increasing wealth of botanical data. Dr. Morin downloaded herbarium specimen data from GBIF, viewed specimen images, and spent many hours poring over the physical specimens in and from many herbaria. (In the acknowledgements of her paper, she cited visiting 10 herbaria and receiving loans from 82, eleven of which are members of the CAP Network!)

Upon reviewing the evidence, Dr. Morin concluded that this North American clade of Campanula should actually be split into eight genera consisting of 12 species. Six of these genera are new to western taxonomy, and Dr. Morin took this opportunity to name several after prominent botanists.

Three of the new genera are named after currently living botanists:

• Ravenella is named in honor of Peter H. Raven, current President Emeritus of the Missouri Botanical Garden and, in Morin's words, an "unstinting [advocate] for plants of the world and their study" (p. 13).
• "Smithiastrum is named in honor of James Payne Smith, Jr., emeritus faculty member in the Biology Department of Humboldt State University; a pioneer in plant conservation, authority on uses of plants especially by native peoples and on the toxicity of plants" (p. 21).
• Furthermore, "Poolea is named in honor of Jackie M. Poole, botanist with the Texas Parks and Wildlife Department for more than thirty years, an effective and passionate advocate for plant conservation, especially of the Texas flora" (p. 27).

​Not only do these new genera highlight advancement in our understanding of plants' evolutionary relatedness, but they also enshrine the names of important scientists who have paved the way to this understanding through their contributions to botanical science.

In this way, herbarium specimens and the researchers that use them also represent a unique intersection between science and history: the plants, but also the people who tirelessly explore the natural world and eagerly share their discoveries.

This week we pause to remember a biologist near and dear to the California community, a dedicated devotee to exploring and explaining the natural world who passed away this April: Dr. Harry Fierstine.

Dr. Fierstine was a native of California; he earned his PhD at UCLA and then moved to San Luis Obispo, where he taught biology, zoology, comparative anatomy, and ichthyology (the study of fish) at California Polytechnic State University for 29 years. However, like most natural scientists, Dr. Fierstine's curiosity was much broader, and his publications profess an interest across the globe. He studied fossils of marlin from California to Virginia, South Carolina to the Philippines. In one, almost comical study, Dr. Fierstine examined the rostra (beak-like "noses") of supposed swordfish that had been found embedded in the hulls of wooden ships from the early 19th century (Fierstine & Crimmin, 1996). By measuring the rostra and studying their shape, he and a colleague determined that the rostra belonged not to swordfish (Xiphias gladius), but marlins (Makaira spp.). Prior to this study, few scientists had recognized this "spearing" behavior in marlins. Dr. Fierstine contributed much to  our understanding of these enormous, mysterious fish.