Thomas S. Elias

Nectaries on the fruit of Crescentia and other Bignoniaceae

Nectar glands are described for the first time on the developing fruits ofCrescentia cujete L. and their presence noted on fruits in 15 other genera of the Bignoniaceae. The nectaries are tiny, nonvascularized, patelliform structures of epidermal origin. They attract ants which are postulated to function in an antiherbivore role.

Rare and endangered species of plants--the soviet side.

In late 1972, the Soviet Union embarked on a program to identify and document plant species that are threatened with extinction. Perhaps 2000 species in the Soviet Union are in need of monitoring or protective measures, while nearly 200 may be in immediate danger of extinction. Currently, the Soviet Union has an official, national list of endangered species, and each of the 15 republics has prepared a regional list. Once a revised national list is prepared, Soviet scientists hope that the Supreme Soviet will pass a law protecting those species. A corresponding law for endangered animals was passed in 1980.

Phytotaxonomy in the People’s Republic of China

As three of the members of the delegation of the Botanical Society of America, the authors participated in a 28-day tour of the People’s Republic of China in May and June, 1978. Botanical institutes and universities were visited in nine cities. A list of names and addresses of the collaborators and editors of family treatments for theFlora Reipublicae Popularis Sinicae is supplemented with a bibliography of published floras and significant taxonomic literature issued primarily since the end of the Cultural Revolution. A few observations on herbaria and herbarium practices are included.

The Complete Trees of North America: Field Guide and Natural History.

The complete trees of North America: field guide and natural history , The complete trees of North America: field guide and natural history , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی