File:Botany for high schools (1910) (20406310215).jpg

Title: Botany for high schools
Identifier: botanyforhighsch00atki (find matches)
Year: 1910 (1910s)
Authors: Atkinson, George Francis, 1854-1918
Subjects: Botany
Publisher: New York, H. Holt and Company
Contributing Library: Wellesley College Library
Digitizing Sponsor: Boston Library Consortium Member Libraries

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
344 GENERAL MORPHOLOGY OF PLANTS synthesis taking place in the green stem. The fruiting part of the stem forms a spike or cone at the apex of certain stems. Most of the species of equisetum grow in sandy places, especially along railroad or other embank- ments, in soil where few other plants grow. This is interesting as it shows how a group of plants which was much more abundant in the past preserves itself from ex- tinction by being adapted to grow under conditions where few other plants can. Some of the equi- setums, however, grow in swamps where other .vegetation is dense. The genus Equisetum is the only genus in this class. It is the only representa- tive of a class of plants which flourished in geo- logical times during the ^^Carboniferous Age. Many of the representa- tives then were tree-like forms, and fossil remains are found in the coal beds formed at that time. There are now about twenty-five living species. 512. The fruiting spike or cone.—This is well studied in the common field horsetail (E. arvense) which is common in damp sandy places in fields and along railroads. There is 8J'^
Text Appearing After Image:
Fig. 324. Sterile plant of horsetail (Equi- setum arvense). Fig. 325- Portion of fertile plant of Equise- tum arvense, s h o \v i n g whorls of leaves and the fruiting spike.

Note About Images