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 collection consists of the field notes of Lyman B. Smith, from field work conducted mainly in Brazil, but also in Argentina, Venezuela, Uruguay, Costa Rica, Wales, Cuba, Barbados, and the United ...

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.

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 ...

The general response to gravity in plants is well known: roots respond positively, growing down, into the soil, and stems respond negatively, growing upward, to reach the sunlight. But how do plants ...

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 ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

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.