bract

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bract

a specialized leaf, usually smaller than the foliage leaves, with a single flower or inflorescence growing in its axil
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Bract

 

a leaf in whose axil the flower develops; a leaf enveloping a flower shoot. Bracts are smaller than ordinary leaves and are reduced. Only in a few plants, such as sage, are they large and colorful. Sometimes, for example, in Cruciferae and dill, the bracts fall early.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

bract

[brakt]
(botany)
A modified leaf associated with plant reproductive structures.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The liquid contained within the bracts was then pipetted into individual plastic pots.
In the axil of the primary bract develops the secondary axis, bearing two sets of secondary bracts and terminating in a secondary flower.
"People say, How do you get so many bracts? and we say, Thats how the plant grows, " said Devin Dotson, the botanic gardens spokesman.
crotalifera have been introduced in the floriculture business mainly differentiated by the size and pigments colouration of bracts. However, there is limited information about the relationships between bract colour and pigment composition during the inflorescence development in this ornamental rhizomatic species.
Quantitative characters were: plant height (from the plant basis to top of primary head); plant diameter (one end to the other of the lower leaves); floral stem length (from the plant basis to the primary head insertion); floral stem diameter (10cm below the primary head insertion); number, length and width of the leaves; number of lateral buds formed after harvest; days of implementation to harvest; fresh mass, length and diameter of the primary head; external bract length; length, width and thickness of the bracts' edible portion (bract basis); thickness, fresh mass and diameter of the bottom; number of secondary heads per plant; bottom fresh mass/ primary head fresh mass ratio.
Extracts from bracts stopped the bacteria responsible for these dental conditions from being able to stick to surfaces and prevented the release of some bacterial toxins.
Bracts are entire, 1-8 mm length, from sessile to amplexicaul.
In cotton (Gossypium hirsutum L.), bracts, capsule walls, and stems are capable of photosynthetic C[O.sub.2] fixation.