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 GLOSSARY
of
ORCHID TERMS 

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 AB | C | DE | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
 
A  Top

aerial root - Any root produced above the growing medium.

anther - The part of the stamen containing the pollen; the end of the column.


B   Top 

backbulb  --- An old pseudobulb behind the part of a sympodial orchid that is actively growing. Although there may be no leaves the presence of undamaged "eyes" is a sign that growth is possible.

bifoliate   -- Having two leaves.

bigeneric - A hybrid between two species of different genera.

blush, or  flush - - Refers to a different color overlay of the base color of a flower., i.e. a red blush

bract - Modified leaves on an inflorescence,


C   Top

cane - An elongated psuedobulb, usually used when describing Dendrobiums or Epidendrums.

clone - Vegetative propagation from an individual plant.

column   -- The central reproductive organ of the orchid flower, formed by the union of the stamens and pistils

column foot   -- The extension of the base of the column, in some orchids, to which the lip is attached.

corolla  -- The inner of the two series of floral segments, which are the sepals and petals. The term is rarely used in connection to Orchid flowers.

crock - Small pieces of broken clay flower pots, or other materials, placed in the bottom of a pot to aid in drainage.

cultivar - An cultivated plant and its vegetative propagations; a horticultural variety or strain.   --


D  Top 

digitate - Branches clustering from one point like fingers on a hand.

discolor - Having two-toned leaves, such as green above and purple below.


E  Top 

epiphyte, epiphytic - An air plant; A plant which grows upon another plant, for support, but does not derive any nourishment from the host plant. Many of the orchids in cultivation are epiphytic in their natural habitats.

Ethylene - is a colorless, gaseous hormone produced by plants to regulate natural development and deterioration. However, when Orchids are exposed to external ethylene gas from vehicle exhaust fumes, cigarette smoke, and naturally ripening fruit, the results are often detrmental. Exposure of Orchids to ethylene often result in flower and flower bud blasting (drop), as well as leaf yellowing and leaf fall.

eye - The bud of a sympodial (many footed) orchid that will eventually develop into a new psuedobulb and flower.


F  Top 

fasciculate - Clustering habit. Offsets from the base form tight bunches.

floccose - Wooly or fuzzy.

flush, or blush - see blush above period.

foliar spray- Many minor nutrients and trace elements beneficial to growth are best absorbed through the stomata of an orchids leaves when mixed with water and sprayed on the plant.

formula - In regards to hybrids, the parents' name forming the hybrid. The names are connected by the multiplication sign X (by)


G  Top 

genus  -- (pl. genera) A natural grouping of closely related species.

glabrous - Shiny and smooth, lacking hairs.

glaucous - A sea-green color, coated with a waxy powder.

globose - Rounded or spherical shape.

grex - All siblings of the same seed cross.


H  Top 

habitat   -- The type of place, or environment, in which a Orchid normally grows.  --

herbarium sheet - A paper with a prepared and dried plant specimen used for identification.

hybrid - The result of a cross between two different species or hybrids.

hybrid swarm - A cross between two species that becomes fertile and breeds true, imitating a true species.


I  Top 

inflorescence - The flowering portion of a plant, including the scape

intergeneric hybrid   -- A hybrid between members of two or more genera.


J  Top 

jointed - having nodes, or points of real or apparent divisions along the stem or psuedobulb.


K  Top 

keiki   -- A Hawaiian word referring to a baby plant produced asexually by an orchid plant, usually used when referring to Dendrobiums, Phalaenopsis, or Vandaceous orchids.


L  Top 

lanceolate - Having a lance-like shape usually refers to leaves.

lead  -- An immature vegetative growth on a sympodial orchid that will develop into flower-producing structure.

lip   -- A modified petal of the orchid flower specialized to aid in pollination and different than the other petals.

lithophyte   -- An orchid that grows on rocks


M  Top 

mesic – Constantly moist.

meristem - The actively growing tissue of a plant, used for artificial cloning.

medium   -- The material in which an orchid is container-grown, it may be organic such as fir bark or inorganic such as lava rock.

mericlone   -- A plant derived from tissue culture that is identical to its parent.

monopodial   -- Orchids which grow upward from a single stem producing leaves and flowers along that stem.


N  Top 
node--A joint on a stem or pseudobulb from which a leaf or growth originates.


O  Top 

offset - A vegetative division or lateral shoot. Synonym: keikei.   --


P  Top 
pachycaul - An abnormally thick-stemmed plant.

panicle   -- An inflorescence with a main stem and branches, the flowers on the lower branches open earlier than the upper ones. A loosely branched inflorescence.

petal   -- One of the segments of the corolla of a flower. In Orchids, one of the three petals is usually modified into a lip or labellum.

photosynthesis  -- The process a plant uses to produce carbohydrates and sugar from water and carbon dioxide in the air using chlorophyl-containing cells exposed to light.

pseudobulb   -- A thickened portion of the stem, resembling a bulb, of many orchids, and some bromeliads. The pseudobulb functions as a water and food storage device.


Q  Top 
quadrigeneric - Pertaining to four genera, primarily used to describe hybrids which contain genetic material from four different genera.
R  Top 

raceme   -- An unbranched inflorescence of stalked flowers.

rhizome   -- A root-bearing stem of sympodial orchids that progressively sends up leafy shoots.

rachis - The central spine of an inflorescence.

reticulations - A network of veins or lines on a leaf surface.   --


S  Top 

semi terete   -- Applied to the hybrids between terete leaved and strap leaved Vandas.

sepal   -- The outer segments of an Orchid flower

sheath   -- A modified leaf that encloses and protects an emerging inflorescence or leaf. Normally dries and sloughs off, when inflorescence or leaf matures.

species   -- A kind of plant that is distinct from other plants.

spike   -- An unbranched inflorescence of unstalked flowers. A term sometimes used in place of ‘inflorescence’

stolon  -- A branch that grows horizontally above the medium and produces roots and shoots at the nodes.

stomata  -- The breathing pores on the surface of a plant's leaves

sympodial   -- Orchids which grow laterally and produce leafy growths along a rhizome


T  Top 

terete - Curled from the edges to form a tapering cylinder.

terrestrial   -- Growing on the ground and supported by soil.

tessellated - Having a checkered or mosaic pattern.

trichome - The scales or hairs which all bromeliads are absorbing organs. These also give plants such as Tillandsias their silvery or fuzzy look.

triploid - Having an extra set of chromosomes. Often causes gigantism and other genetic morphs.   --


U  Top 

unifoliate  -- Having one leaf.


V  Top 

variegated - Having stripes, usually white, usually randomly up each leaf.

velamen   -- The thick sponge-like covering of the roots of epiphytic orchids which helps prevent water loss and aids in absorption.

virus   -- A type of infectious agent, much smaller than common microorganisms, several forms of which affect certain kinds of orchids.  --


W  Top 
Warm House--A greenhouse, intended for growing Orchids, in which the night temperature is maintained above 60 degrees F.
X  Top 

xeric - Adapted to arid conditions.


Y  Top 

yellowing-- Yellowing of the top of a leaf usually indicates too much light. Yellowing of entire older leaf usually indicates sloughing off of the leaf. Yellowin spots on top of leaf usually indicates sucking insect on underside.


Z  Top 

zgomorphic-- Able to be divided into two equal parts in only one plane, such as Orchid flowers are.


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The Free Orchid Ezine© has Orchid growing tips, articles, and tricks.
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