How tall can a tree grow? Does sunlight or water limit the size and photosynthetic capacity of a leaf? Could constraints on leaf growth really determine the height of a tree? These are all questions ...

THIS little book is not altogether devoid of use; but the author has often sacrificed clearness at the shrine of ambition, in endeavouring to compress about three times too much matter into his pages.

Most of what we have come to think of as our daily fruits, vegetables, and grains were domesticated from wild ancestors. Over hundreds and thousands of years, humans have selected and bred plants for ...

This collection contains one item by Christ: a specimen list of plants from Venezuela. The notes are undated, but presumed to be created in the 20th Century. At least 24 hours advance notice is ...

This collection consists of 16 field books of Hernando Garcia Barriga from collecting trips in Colombia, Ecuador, and Venezuela, circa 1930-1970. The materials consist of small travel journals and ...

FROM the author's experience at the Pharmaceutical Society, together with that gained during the time he held the lectureship at Westminster Hospital, he is likely to know pretty well the requirements ...

A new combination is made and two new species described from the malvaceous flora of Chiapas, Mexico: Malvaviscus achanioides (Turcz.) Fryx., Anoda pristina Fryx., and Sida anomalocalyx Fryx.