Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
Of flowering plants about 200,000
species are known.
In the Gray Herbarium about
120,000 species are represented.
The migration of plants northward after
their destruction during the Glacial Period
has not yet ceased. Fernald told me
that he has been watching the northward
migration along an estate in Maine
and that in 40 years a number of
plants (one being the gentian) have spread
nearly 35 miles.