Carl Linnaeus quote: “We say there are as many genera as there are similarly constituted fructifications of different natural species.”

“We imagine that the Creator at the actual time of creation made only one single species for each natural order of plants, this species being different in habit and fructification from all the rest. That he made these mutually fertile, whence out of their progeny, fructification having been somewhat changed, Genera of natural classes have arisen as many in number as the different parents, and since this is not carried further, we regard this also as having been done by His Omnipotent hand directly in the beginning; thus all Genera were primeval and constituted a single Species. That as many Genera having arisen as there were individuals in the beginning, these plants in course of time became fertilised by others of different sort and thus arose Species until so many were produced as now exist… these Species were sometimes fertilised out of congeners, that is other Species of the same Genus, whence have arisen Varieties.”

Carl Linnaeus (1707–1778) Swedish botanist, physician, and zoologist

Fundamenta fructificationis (1742). As quoted in John S. Wilkins (2009), "Species: A History of the Idea," University of California Press. p. 72

“The principle being accepted that all Species of one Genus have arisen from one mother through different fathers, it must be assumed
# That in the beginning the Creator created of each natural Order only one plant with reproductive power.
# That by their various mixings different plants have arisen which belong to the mother's natural order as they are similar to the mother with regard to their fructifications, and are, as it were, species of the order, i. e., genera.
# We may assume that plants have arisen within the orders, i. e. by genera of one order, may mix with each other. In this was there will arise species that should be referred to the mother's genus as her daughters.”

Carl Linnaeus (1707–1778) Swedish botanist, physician, and zoologist

Praelectiones (Lectures, 1744) quoted in Larson (1967:317)

“When we come to consider specific characters, we see that a difference exists—that, in short, the species and even genera are no longer represented upon earth. More than this, it will be found that the earliest species comparatively soon gave place to others, and that they are not represented even in the next higher group of rocks.”

Robert Chambers (publisher, born 1802) book Vestiges of the Natural History of Creation

Source: Vestiges of the Natural History of Creation (1844), p. 60

“Within the body there are billions of different particles. Similarly, there are many different thoughts and a variety of states of mind.”

Tenzin Gyatso (1935) spiritual leader of Tibet

The Dalai Lama's Book of Wisdom (2000).
Context: Within the body there are billions of different particles. Similarly, there are many different thoughts and a variety of states of mind. It is wise to take a close look into the world of your mind and to make the distinction between beneficial and harmful states of mind. Once you can recognize the value of good states of mind, you can increase or foster them.

“When one reads about Tyrannosaurus and Brontosaurus, one is not dealing with species, like lions or African elephants. Instead, these are genera, a group of animal species. For example, the lion is in the genus Panthera. Species of Panthera include the lion Panthera leo, the tiger P. tigris, and the leopard P. pardus, among others. So saying Tyrannosaurus is much like saying "the big cats".”

Gregory Scott Paul (1954) U.S. researcher, author, paleontologist, and illustrator

Gregory S. Paul (1988) Predatory Dinosaurs of the World, Simon and Schuster, p. 176
Predatory Dinosaurs of the World

“When one reads about Tyrannosaurus and Brontosaurus, one is not dealing with species, like lions or African elephants. Instead, these are genera, a group of animal species. For example, the lion is in the genus Panthera.”

Gregory Scott Paul (1954) U.S. researcher, author, paleontologist, and illustrator

Species of Panthera include the lion Panthera leo, the tiger P. tigris, and the leopard P. pardus, among others. So saying Tyrannosaurus is much like saying "the big cats".
Gregory S. Paul (1988) Predatory Dinosaurs of the World, Simon and Schuster, p. 176
Predatory Dinosaurs of the World

“We may understand why the species of the same genus, or genera of the same family, resemble each other more nearly in their embryonic than in their more fully developed state, or how it is that”

Charles Lyell (1797–1875) British lawyer and geologist

Source: The Geological Evidences of the Antiquity of Man (1863), Ch.21, p. 415
Context: We may understand why the species of the same genus, or genera of the same family, resemble each other more nearly in their embryonic than in their more fully developed state, or how it is that in the eyes of most naturalists the structure of the embryo is even more important in classification than that of the adult, 'for the embryo is the animal in its less modified state, and in so far it reveals the structure of its progenitor. In two groups of animals, however much they may at present differ from each other in structure and habits, if they pass through the same or similar embryonic stages, we may feel assured that they have both descended from the same or nearly similar parents, and are therefore in that degree closely related. Thus community in embryonic structure reveals community of descent, however much the structure of the adult may have been modified.

“The Constitution requires that Congress treat similarly situated persons similarly, not that it engage in gestures of superficial equality.”

William H. Rehnquist (1924–2005) Chief Justice of the United States

Rostker v. Goldberg, 453 U.S. 57 at 80 (1981) (majority opinion); this ruling upheld a military draft for males only.
Judicial opinions

“A knowledge of Mendelism is recognized by me as only the ABC to the broader knowledge of heredity necessary for success in animal and plant improvement, and all variations and all mutations of every nature are responses to environment which, by repetition and combination, are slowly but surely fixed in heredity and at last made tangible, most often through the crossing of varieties, species, or genera, either by nature or that part of nature called man.”

Luther Burbank (1849–1926) American botanist, horticulturist and pioneer in agricultural science

How Plants are Trained to Work for Man (1921) Vol. 1 Plant Breeding

“The pattern of sex differences found in our species mirrors that found in most mammals and in many other animals. As such, considerations of parsimony suggest that the best explanation for the human differences will invoke evolutionary forces common to many species, rather than social forces unique to our own. When we find the standard pattern of differences in other, less culture-bound creatures, we inevitably explain this in evolutionary terms. It seems highly dubious, when we find exactly the same pattern in human beings, to say that, in the case of this one primate species, we must explain it in terms of an entirely different set of causes — learning or cumulative culture — which coincidentally replicates the pattern found throughout the rest of the animal kingdom. Anyone who wishes to adopt this position has a formidable task in front of them. They must explain why, in the hominin lineage uniquely, the standard evolved psychological differences suddenly became maladaptive, and thus why natural selection “wiped the slate clean” of any biological contribution to these differences. They must explain why natural selection eliminated the psychological differences but left the correlated physical differences intact. And they must explain why natural selection would eliminate the psychological differences and leave it all to learning, when learning simply replicated the same sex differences anyway. How could natural selection favor extreme flexibility with respect to sex differences if that flexibility was never exercised and was therefore invisible to selection?”

Steve Stewart-Williams (1971)

Source: The Ape that Thought It Was a Peacock: Does Evolutionary Psychology Exaggerate Human Sex Differences? (2013), pp. 142-143

“We say there are as many genera as there are similarly constituted fructifications of different natural species.”

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