Types of Buds
Buds are often useful in the identification of plants, especially for woody plants in winter when leaves have fallen. Buds may be classified and described according to different criteria: location, status, morphology, and function.
Botanists commonly use the following terms:
- for location:
- terminal, when located at the tip of a stem (apical is equivalent but rather reserved for the one at the top of the plant);
- axillary, when located in the axil of a leaf (lateral is the equivalent but some adventitious buds may be lateral too);
- adventitious, when occurring elsewhere, for example on trunk or on roots (some adventitious buds may be former axillary ones reduced and hidden under the bark, other adventitious buds are completely new formed ones).
- for status:
- accessory, for secondary buds formed besides a principal bud (axillary or terminal);
- resting, for buds that form at the end of a growth season, which will lie dormant until onset of the next growth season;
- dormant or latent, for buds whose growth has been delayed for a rather long time. The term is usable as a synonym of resting, but is rather employed for buds waiting undeveloped for years, for example epicormic buds;
- pseudoterminal, for an axillary bud taking over the function of a terminal bud (characteristic of species whose growth is sympodial: terminal bud dies and is replaced by the closer axillary bud, for examples beech, persimmon, Platanus have sympodial growth).
- for morphology:
- scaly or covered, when scales (which are in fact transformed and reduced leaves) cover and protect the embryonic parts;
- naked, when not covered by scales;
- hairy, when also protected by hairs (it may apply either to scaly or to naked buds).
- for function:
- vegetative, if only containing vegetative pieces: embryonic shoot with leaves (a leaf bud is the same);
- reproductive, if containing embryonic flower(s) (a flower bud is the same);
- mixed, if containing both embryonic leaves and flowers.
Read more about this topic: Bud
Famous quotes containing the words types of, types and/or buds:
“Our children evaluate themselves based on the opinions we have of them. When we use harsh words, biting comments, and a sarcastic tone of voice, we plant the seeds of self-doubt in their developing minds.... Children who receive a steady diet of these types of messages end up feeling powerless, inadequate, and unimportant. They start to believe that they are bad, and that they can never do enough.”
—Stephanie Martson (20th century)
“As for types like my own, obscurely motivated by the conviction that our existence was worthless if we didn’t make a turning point of it, we were assigned to the humanities, to poetry, philosophy, painting—the nursery games of humankind, which had to be left behind when the age of science began. The humanities would be called upon to choose a wallpaper for the crypt, as the end drew near.”
—Saul Bellow (b. 1915)
“Pale hands, pink-tipped, like Lotus buds that float
On those cool waters where we used to dwell,
I would have rather felt you round my throat
Crushing out life than waving me farewell!”
—Laurence Hope (1865–1904)