Columbia Encyclopedia

Search results

500 results found

herbarium

(Encyclopedia)herbarium, collection of dried and mounted plant specimens used in systematic botany. To preserve their form and color, plants collected in the field are spread flat in sheets of newsprint and dried, ...

Bose, Sir Jagadis Chandra

(Encyclopedia)Bose, Sir Jagadis Chandra, or Sir Jagadis Chunder Bose jəgäˈdēs chŭnˈdrə bōs, chŭnˈdər [key], 1858–1937, Indian physicist and plant physiologist, educated in Calcutta (now Kolkata) and at...

auxin

(Encyclopedia)auxin ôkˈsĭn [key], plant hormone that regulates the amount, type, and direction of plant growth. Auxins include both naturally occurring substances and related synthetic compounds that have simila...

Engler, Adolf

(Encyclopedia)Engler, Adolf äˈdôlf ĕngˈlər [key], 1844–1930, German botanist. He emphasized the importance of geological history in the study of plant geography, and worked out an influential system of plan...

gametophyte

(Encyclopedia)gametophyte gəmēˈtəfītˌ [key], phase of plant life cycles in which the gametes, i.e., egg and sperm, are produced. The gametophyte is haploid, that is, each cell contains a single complete set o...

Ruth, Babe

(Encyclopedia)Ruth, Babe (George Herman Ruth), 1895–1948, American baseball player, considered by many the greatest of all baseball players, b. Baltimore. Ruth, a left hander, proved to be (1914–19) a formida...

layering

(Encyclopedia)layering, horticultural practice of propagating a plant by rooting a branch before severing it from the mother plant. Typically the branch is bent and a section that has been slit or broken on the und...

Gleason, Henry Allan

(Encyclopedia)Gleason, Henry Allan glēˈsən [key], 1882–1975, American botanist, plant geographer, and plant ecologist. His floristic studies of North American vegetation led to his “individualistic concept o...

de Candolle, Augustin Pyrame

(Encyclopedia)de Candolle, Augustin Pyrame də käNdōlˈ [key], 1778–1841, Swiss botanist. Considered the most important Swiss botanist of his era, de Candolle wrote on a wide variety of botanical topics, from m...

tendril

(Encyclopedia)tendril, slender, sensitive structure of many climbing plants that by a response to contact (see auxin) supports the plant. Tendrils are modified stems, leaves, or leaf parts or roots. Most young tend...