are there other scientists who have studied the species that we first mentioned?
Yes, Ray and Tournefort.
Philosophia Botanica
 The terms genus and species acquired their specialized biological usage from Linnaeus's predecessors, in particular Ray and Tournefort. There was also the question of whether plants should a) be put together or separated because they conform to a definition (essentialism) or b) put together with plants having similar characteristics generally, regardless of the definition (empiricism). Linnaeus was inclined to take the first approach using the Method of Logical Division based on definition, what he called in "Philosophia Botanica" §152 the "dispositio theoretica" – but in practice he employed both methods.

Botanical historian Alan Morton, though praising Linnaeus's contribution to classification and nomenclature, is less complimentary about the theoretical ideas expressed in the publications discussed above:
what species is lactifluus volemus? It is a species of fungus in the family Russulaceae. who was the first to name and describe it? The first mention of "Lactifluus volemus" in the scientific literature was in Carl Linnaeus's 1753 "Species Plantarum", under the name "Agaricus lactifluus". can this be consumed by humans? Yes, it is edible. in the family of fungal species mentioned above, are there any species that cause decay in wooden objects? The corticioid species in "Boidinia", "Gloeopeniophorella", and "Pseudoxenasma" are saprotrophic, wood-degrading fungi that develop on dead wood. are there any endangered species within this family? Yes, some species of "Lactarius", "Lactifluus" and "Russula"  are endangered. what other works has the afore-mentioned scientist published? Philosophia Botanica, Species Plantarum when was the first work published? 1751 under what context was it published? The first edition of 1735 was just eleven pages long, but this expanded with further editions until the final thirteenth edition of 1767 had reached over 3000 pages.
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Philosophia Botanica [SEP] Historical assessment
Linnaeus's system of classification follows the principles of Aristotelian logic by which arranging subjects into classes is classification; distinguishing divisions of classes is logical division. The group to be divided is the genus; the parts into which it is divided are the species. The terms genus and species acquired their specialized biological usage from Linnaeus's predecessors, in particular Ray and Tournefort. There was also the question of whether plants should a) be put together or separated because they conform to a definition (essentialism) or b) put together with plants having similar characteristics generally, regardless of the definition (empiricism). Linnaeus was inclined to take the first approach using the Method of Logical Division based on definition, what he called in "Philosophia Botanica" §152 the "dispositio theoretica" – but in practice he employed both methods.