...In the very difficult group of asters whichhas caused endless confusion to human botanists these insectsseem always able to select the one species—Asterumbellatus... 
Clarence M. Weed 「Butterflies Worth Knowing」
...Now the asters as a group have been a source of muchtrouble to the botanists who have attempted to classifythem as to species and variety...
Clarence M. Weed 「Butterflies Worth Knowing」
...napus and rapa; but according to other botanists from three species; whilst others again strongly suspect that all these forms, both wild and cultivated, ought to be ranked as a single species...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...These five or six forms have been ranked by most botanists as specifically distinct; but this may be doubted, for Andrew Knight, who raised no less than 400 crossed strawberries, asserts that the F...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...The most distinguished botanists and zoologistsentirely rejected it, and did not even deign to reply to it...
Ernst Haeckel 「The Evolution of Man」
...]
[*** The botanists...
David Collins 「An Account of the English Colony in New South Wales, Vol. 1」
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