Inflorescence
-
Upload
muhammad-fahad-saleh -
Category
Business
-
view
1.706 -
download
4
Transcript of Inflorescence
![Page 1: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/1.jpg)
Inflorescence
![Page 2: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/2.jpg)
Inflorescence • An inflorescence may be defined as a cluster of
flowers,• all flowers arising from the main stem axis or
peduncle:
![Page 3: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/3.jpg)
cyme
![Page 4: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/4.jpg)
• Solitary
just one flower on the peduncle
![Page 5: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/5.jpg)
• Spadix - is the characteristic inflorescence of the remarkable
arum family (Araceae). - It consists of a thickened, fleshy axis (spike) bearing
clusters of sessile, apetalous, unisexual flowers. - The small unisexual flowers are packed together along
the lower region of an erect, phallus-like central spike, typically with male flowers above the female.
- The upper region of the spadix is usually devoid of flowers.
- Male (staminate) flowers consist of numerous stamens packed together,
![Page 6: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/6.jpg)
- while female (pistillate) flowers consist of numerous individual pistils.
- Individual flowers are reduced to a single stamen or pistil (gynoecium).
- The spadix emerges from a vase-shaped or funnel-like modified leaf or spathe which is often brightly colored.
- The spadix of some arums emits a putrid odor that attracts carrion flies for pollination.
![Page 7: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/7.jpg)
![Page 8: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/8.jpg)
![Page 9: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/9.jpg)
• Raceme - This
inflorescence has an unbranched main axis and all the pedicels of the flowers are more or less the same length.
![Page 10: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/10.jpg)
Other Raceme
Sweet pea (Lathyrus odoratus) Chinese hat (Holmskioldia sp.)
![Page 11: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/11.jpg)
• Umbel - The peduncle of this type of inflorescence bears all
of the pedicels at its apex.
Hydrangea (Hydrangea macrophylla) Lantana (Lantana sp)
![Page 12: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/12.jpg)
• Compound Umbel
- The peduncle bears a number of primary pedicels at its apex. These do not bear flowers but a number of secondary pedicels at their apices which in turn bear the flowers. Frangipani (Plumeria rubra)
![Page 13: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/13.jpg)
![Page 14: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/14.jpg)
• Spike
- This inflorescence type has a long, unbranched main axis which bears flowers which have no pedicels or very short pedicels.
Silver oak (Grevillea robusta)
![Page 15: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/15.jpg)
Quiver tree (Aloe dichotma)
Gladiolus (Gladiolus sp.)
Red hot poker (Kniphofia sp.)
![Page 16: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/16.jpg)
• Head (capitulum) - which do not have pedicels
- are grouped together on the top of a peduncle
which may be flattened or rounded.
- Daisies (Asteraceae) are a good example
- outer flowers may have one very large petal
- In other families the whole inflorescence may
be surrounded by bracts e.g. the Proteas.
- This gives the impression that the whole
structure is a single flower but it may infact be
hundreds of flowers grouped together.
![Page 17: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/17.jpg)
Examples:
King protea (Protea
cynaroides) Daisy species
![Page 18: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/18.jpg)
Mimosa sp. Pincushions (Leucospermum sp.)
![Page 19: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/19.jpg)
• A Corymb - The main axis of this
inflorescence type is elongated and unbranched as in a raceme, but the pedicels of the flowers are of unequal length so that the entire structure appears flat-topped. Examples include hawthorn, the apple and dogwood.
Crataegus calpodendron
![Page 20: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/20.jpg)
![Page 21: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/21.jpg)
HawthornHawthorn
Hydrangea corymb (group of flowers displayed as a disc)
![Page 22: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/22.jpg)
Difference of corycomb, cyme and umbel
![Page 23: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/23.jpg)
• Spikelet -like a spike, but
with the flowers and inflorescence subtended by specialized bracts. Usually applied to the grass family (Poaceae)
![Page 24: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/24.jpg)
• Verticil or Whorl-
-The flowers are borne in a tight circle at each node
![Page 25: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/25.jpg)
• PaniclePanicle The main
axis has branches which are in turn rebranched
![Page 26: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/26.jpg)
Inflorescence Types
![Page 27: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/27.jpg)
![Page 28: Inflorescence](https://reader033.fdocuments.net/reader033/viewer/2022060119/558e4f581a28ab13318b4740/html5/thumbnails/28.jpg)