 Botanists declare that a very lengthy course of cultivation is required so to alter the form of a plant that it can no longer be identified with the wild species ; and still more protracted must be the artificial propagation for it to lose its power of...  Proceedings and Collections - Page 103by Wyoming Historical and Geological Society - 1905Full view - About this book
 | Daniel Garrison Brinton - History - 1876 - 348 pages
...remote epoch. Still more forcibly does nature herself bear witness to this antiquity of possession. Botanists declare that a very lengthy course of cultivation...rely wholly on man to preserve it from extinction. Now this is precisely the condition of the maize, tobacco, cotton, quinoa, and mandioca plants, and... | |
 | Daniel Garrison Brinton - Social Science - 1876 - 362 pages
...Botanists dei Second Visit to the United States, ip 252. clare that a very lengthy course of cultivation ia required so to alter the form of a plant that it can...rely wholly on man to preserve it from extinction. Now this is precisely the condition of the maize, tobacco, cotton, quinoa, and mandioca plants, and... | |
 | Ellen Russell Emerson - Comparative civilization - 1884 - 756 pages
...epoch. His citation of known laws of plant life is especially interesting to the botanist : — They declare that a very lengthy course of cultivation...independent life, and to rely wholly on man to preserve from extinction. Now this is precisely the condition of the maize, tobacco, cotton, qninoa, and mandioca... | |
 | America - 1893 - 926 pages
...interest to my readers. We know that they cultivated the plant, but the question arises, where was.it first found in its wild state? Botanists declare that...identified with the wild species: and still more protracted mustjse the artificial propagation for it to lose iis power of independent life.-^ncT to rely wholly... | |
| |
