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Chapter: 11th Botany : Chapter 5 : Taxonomy and Systematic Botany

Botanical Description Of Ricinus communis (Castor)

Botanical Description Of Ricinus communis (Castor)
Leaf: Simple, petiolate, hollow, exstipulate, alternate, broad, palmately lobed, usually 7-9 lobes, serrate, palmately reticulate divergent venation.

Botanical Description Of Ricinus communis (Castor)


Habit: Tall perennial shrub

 

Root: Branched tap root system

 

Stem: Aerial, erect, cylindrical, branched and hollow, solid at the base, glabrous,

 

Leaf: Simple, petiolate, hollow, exstipulate, alternate, broad, palmately lobed, usually 7-9 lobes, serrate, palmately reticulate divergent venation.

 

Inflorescence: Terminal panicle.

 

Male Flower Bracteate, ebracteolate, pedicellate, male flowers (open for one day) towards lower portion of the inflorescence, actinomorphic, incomplete.




 

Perianth: Tepals 5, apophyllous, uniseriate, green, valvate aestivation, odd tepal posterior in position.

 

Androecium: Stamens numerous (upto 1000) crowded and connate into about 8mm long cluster of stipitate phalanges, each stamen profusely branded, anthers globose basifixed.

 

Gynocium: usually absent rarely represented by pistillode.

Female Flower Bracteate, ebracteolate, pedicellate, female flowers (open for fourteen days) found towards the apical portion of inflorescence, actinomorphic, incomplete and hypogynous.


Perianth: Tepals 3, apophyllous, green valvate.


Androecium: Absent but staminode is present.

 

Gynoecium: Tricarpellary, syncarpous, ovary superior, distinctly trilobed, trilocular, covered with spiny outgrowth, single large ovule in each locule on axile placentation, style three with three bifid stigma.

 

Fruit: A schizocarp with spiny outgrowth, splits into three one seeded cocci.

 

Seed: Endospermous, knob-like caruncle develops from the micorpyle, that absorbs and temporarily retains water enabling germination.

 

Floral Formula:

  


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11th Botany : Chapter 5 : Taxonomy and Systematic Botany


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