The Mutation Theory Volume 1 by Hugo De Vries
---------------------------------------------------------------
Author: Hugo De Vries
Page Count: 142 pages
Published Date: 01 May 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
Type: PDF
ISBN: 9781231193228
File size: 45 Mb
Download Link: The Mutation Theory Volume 1
---------------------------------------------------------------
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 Excerpt: ...long since run wild, but was still recognizable. The Oenotheras were most numerous on the northeast corner of the field, close to the bed they spread from. Here they formed a dense jungle of branched stems as high as a man. The area of the whole field was about 5000 square meters. This dense group was surrounded by a broad zone of plants a few of which were in flower, and of numerous rosettes, growing together; whilst to the west of this zone only isolated rosettes were to be found. But on the greater part of the field not a single Oenothera was to be seen at first glance; though, after further search I found flowering plants in two places, and in five or six other places rosettes with radical leaves, evidently from seed which had germinated that spring. We may conclude therefore that the plants began to spread from the northeast corner of the field in the period 1884 to 1886. In 1888 the whole field had become occupied by isolated groups consisting of both young and two-year-old flowering individuals. In the winter 1886-7 and 1887-8 a part of the northeast corner of the field comprising more than one-half of the Oenothera patch was deeply dug and planted with oaks. But the ground was so full of seed that for two summers afterwards, this piece was thickly covered with rosettes and flowering plants of Oenothera. One result of this was a very high degree of variability in the duration of life of the plants, for there could be seen on this spot during the month of August and September nnmerous stems of every conceivable height between rosettes which had not yet developed a stem and tall flowering plants. In 1889 the owner of the property, having decided to plant the rest of the field with trees,1 had two straight paths made, intersecting each other, and a semi...
Read online The Mutation Theory Volume 1
Buy and read online The Mutation Theory Volume 1
Download and read The Mutation Theory Volume 1 for pc, mac, kindle, readers
Download to iPad/iPhone/iOS, B&N nook The Mutation Theory Volume 1
