ORCHIDACEAE
GROUP MEMBERS:
MICHELLE

BAILEY
MARK BASTIAN
REHANA FAREED
SHEBIKI JEFFREY
THESIA KING
BHAVINA POORAN
KIMBERLY SANG...
ORCHID FAMILY (ORCHIDACEAE)
Largest

family of flowering plants
Terrestrial, epiphytic, or
saprophytic herbs
Orchid flo...
Habitat & Distribution
 Second

most widely distributed plants in the
world after grasses
 Mainly found in warm, moist p...
Parts of an Orchid Flower
General Characteristics of Orchids:
Pedicel

Calyx
Petals
Characteristics of Orchids:
Distinguishing characteristics of the orchid are
found in the flower.
•
The petal aka lip or l...
Characteristics of Orchids (con’t):
 Reduced

filaments, anthers, style and stigma; fused
into one structure called the c...
Characteristics of Orchids (con’t):
Stigma is in the form of a shallow
depression on the inner sides of
the column.
In t...
Characteristics of Orchids (con’t):
 Rostellum

(flap of tissue covered with sticky
stigmatic liquid) separates the stigm...
Characteristics of Orchids (con’t):
 Fruits

are dry capsules; small, numerous, dust-like
seeds that lack an endosperm (w...
Economic Importance of
Orchids
 They

are used mainly as ornamentals (to
beautify the environment).
 Their sweet extract...
References:
 Raskoti,

B. B.; 2013; Orchid Distribution;
http://www.ionopsis.com/distribution.htm;
22/09/2013
 Welch-Kee...
characteristics of the family Orchidaceae ppt
characteristics of the family Orchidaceae ppt
characteristics of the family Orchidaceae ppt
characteristics of the family Orchidaceae ppt
characteristics of the family Orchidaceae ppt
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characteristics of the family Orchidaceae ppt

  1. 1. ORCHIDACEAE
  2. 2. GROUP MEMBERS: MICHELLE BAILEY MARK BASTIAN REHANA FAREED SHEBIKI JEFFREY THESIA KING BHAVINA POORAN KIMBERLY SANGSTER
  3. 3. ORCHID FAMILY (ORCHIDACEAE) Largest family of flowering plants Terrestrial, epiphytic, or saprophytic herbs Orchid flowers come in different colours except black Example of an orchid is Vanilla planifolia, native to Mexico and Central America
  4. 4. Habitat & Distribution  Second most widely distributed plants in the world after grasses  Mainly found in warm, moist places  Also found in dry or seasonally cold environments such as savannahs and semideserts  Found in rainforests, swamps  Worldwide (except Antarctica): mostly tropics in countries such as Guyana, Venezuela and Brazil; even the Arctic Circle and Africa
  5. 5. Parts of an Orchid Flower
  6. 6. General Characteristics of Orchids: Pedicel Calyx Petals
  7. 7. Characteristics of Orchids: Distinguishing characteristics of the orchid are found in the flower. • The petal aka lip or labellum is opposite the fertile stamen. • The fertile stamen or stamens are on one side of the flower opposite the lip, making the flower bilaterally symmetrical. • The pistil is in the middle of the flower. • Single anther is retained at the top of the column to form a cap-like structure (in most orchids).
  8. 8. Characteristics of Orchids (con’t):  Reduced filaments, anthers, style and stigma; fused into one structure called the column
  9. 9. Characteristics of Orchids (con’t): Stigma is in the form of a shallow depression on the inner sides of the column. In the bud, the lip is oriented upward but as the flower matures, it usually ends up downward; process called resupination. Outer whorl: 3 sepals Inner whorl: 3 petals
  10. 10. Characteristics of Orchids (con’t):  Rostellum (flap of tissue covered with sticky stigmatic liquid) separates the stigma and anther.  Primitive orchids – pollinia (contains many pollen) stick to stigmatic fluid on the insects’ backs because the orchids contain no rostellum.  Advanced orchids – pollinia caudicles are already attached to the rostellum; a portion comes off as a sticky pad known as the viscidium
  11. 11. Characteristics of Orchids (con’t):  Fruits are dry capsules; small, numerous, dust-like seeds that lack an endosperm (wind dispersal)  The seeds depend on fungus since the fungus penetrates the seed and provides it with nutrients to germinate and grow.  Orchids contain several types of nectaries, including the extrafloral types. Floral fragrances are diverse, from quite sweet to the smell of rotting liver.  Some nectaries are located on the side lobes of the lip and secretion along the groove of the lip occurs.
  12. 12. Economic Importance of Orchids  They are used mainly as ornamentals (to beautify the environment).  Their sweet extracts can be used in perfume production.  Orchids are used as food in Indonesia.  Orchids have medicinal value in China and Japan.  Several species of orchids are used as a glue substitute (derived from the pseudobulbs).
  13. 13. References:  Raskoti, B. B.; 2013; Orchid Distribution; http://www.ionopsis.com/distribution.htm; 22/09/2013  Welch-Keesey, M.; 2013; Just the Facts about Orchids; http://www.indyzoo.com/SiteAssets/pdfs/Handou tA-OrchidFacts.pdf; 22/09/2013

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