Flowers 100131104452-phpapp01
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Flowers 100131104452-phpapp01



updated (2014)

updated (2014)



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Flowers 100131104452-phpapp01 Flowers 100131104452-phpapp01 Presentation Transcript

  • Flowers Presented by: Geonyzl L. Alviola
  • Intro on flowers  A diagnostic feature of the angiosperm.  Modified reproductive shoot  The shoot is determinate
  • Flower parts
  •  Pedicel – the flower stalk (if absent the flower attachment is sessile)  Bract – reduced leaf  Epicalyx - series of bracts calyx epicalyx
  •   Receptacle – region of the flower which the floral parts are attached Perianth (perigonium) receptacle
  •  Tepals – if perianth is undifferentiated/ the individual leaf parts - The term tepal is usually used when all segments of the perianth are of similar shape and color,
  • Perianth is differentiated into two groups A. Calyx – the outermost series of the whorl and consist of individual units of modified leaves called SEPALS B. Corolla – the inner most series that consist a modified leaves called PETALS
  •  Hypanthium – Floral tube - a cup like or tubular structure - around or top of the ovary - bearing along the margin the sepals, petals and stamen
  •  Nectary – a specialized structure that secretes nectar - found on parianth parts , - or within the receptacle - or within the androecium or gynoecium
  •  Androecium refers to all of the male organs - collectively called STAMENS consist of the following parts: a. filament (stalk-like) b. anther (pollen bearing)
  •  Gynoecium refers to all female organs of a flower. - collective called CARPEL(pistil) consist of the following parts: a. ovary b. style c. stigma
  • gynoecium
  •  Gynostegium - the male and female organs are fused as one structure
  •  Androgynophore - A stalk that bears the androecium and gynoecium
  • Flower Attachment
  • Pedicellate  Flowers with pedicel
  • Flower cycly
  • Flower Cycly - Refers to the number of cycles (series of whorls) or floral parts. Two basic terms : 1. Complete – having all four major series (sepals, petals, stamens & carpels) 2. Incomplete – for a flowering lacking one or more of the four major whorls or parts.
  • Complete Flower
  • Incomplete flower Tulip Raspberry
  • Flower Sex and Plant Sex
  • Floral Sex or Flower sex  1. 2. Refers to the absence or presence of male and female parts with the flower. two kinds : Perfect / bisexual – both stamen and carpel are present in one flower Imperfect/ unisexual – only one is present
  • Imperfect  Have two kinds : 1. Pistillate (female) – carpel present but stamen absent
  • Imperfect Flower 2. Staminate – have only the stamen
  • Plant Sex  Refers to the presence and distribution of perfect and imperfect flower on individual of a species. A. Hermaphroditic – only a perfect flower B. Monoecious – a plant with only unisexual flowers both male and female on the same individual plant C. Dieocious – have unisexual flower with staminate and pistillate on separate individuals
  • Monoecious Plant
  • Dioecious
  • Other variations    Polygamous plant – having both bisexual and unisexual flowers Andromonoecious plant - having both staminate and perfect flowers on the same individual Gynomonoecious plant – both pistillate and perfect flowers on the same individual
  •   Trimonoecious – refers to a plant with pistillate, staminate and perfect flowers on the same individual Gynodiecious – refers to a plant with female flowers on some individuals and perfect flowers on the other
  •   Androdioecious – refers to a plant with male flowers on some and perfect flowers on othe individuals Trioecious – refers to a plant with pistillate, staminate and perfect flowers on different individuals
  • Flower Symmetry