U.ELAYA PERUMAL

LEAF MORPHOLOGY 

SIMPLE LEAF

LEAF SHAPES 

CORDATE

Eg: Thespesia populnea 

ELLIPTIC

Eg: Dillenia indica L.

LANCEOLATE

Eg: Polyalthia longifolia 

LINEAR

Eg: Nandina domestica - BAMBOO 

OBLONG


OVATE

Eg: Pachygone ovata 

SPATULATE

Eg: Stachytarpheta jamaicensis 

 

COMPOUND LEAVES 

UNI-PINNATELY COMPOUND LEAF 

Eg: Azadirachta indica A.Juss. - Meliaceae

The opposite, pinnate leaves are 20–40 centimetres (7.9–16 in) long, with 20 to 31 medium to dark green leaflets about 3–8 centimetres (1.2–3.1 in) long. The petioles are short.

 

BI-PINNATELY COMPOUND LEAF 

Eg: Caesalpinia pulcherrima L. - Fabacaea

Bipinnately compound, fern-like, many 3/4in leaflets; normally bright green turning red in winter, sometimes leafless in winter

PAIRY PINNATELY COMPOUND LEAF

Eg: Lannea coromandelica

             The leaf lets will be in pair.

IMPARIPINNATE COMPOUND LEAF

Eg: Gliricidia sepium (Jacq.) Kunth ex Walp. - Fabaceae 

 The leaf lets will be in impair. The apical leaflet will be single.

PALMATE 

 Having three or more veins, leaflets, or lobes radiating from one point

Eg: Ricinus communis - Euphorbiaceae 


PINNATELY TRIFOLIOLATE

Having three leaflets from three different origin.

Eg: Pongamia pinnata (L.) Merr.

    

PALMATELY TRIFOLIOLATE 

Having three leaflets from single origin.

Eg: Toddalia asiatica (L.) Lam.

Different Plant species with different leaf shapes. 

FAMILY EUPHORBIACEAE (APG III) POWER POINT PRESENTATION BY U.ELAYA PERUMAL.


In India 261,396 hectares are covered with forest.

Russia has the largest area of forest.

India has 446,100 hectares of Mangrove.

Indonesia has the largest area of mangrove.

North american Sequoia species are the tallest trees of the world.

In 2007  9,400,000 tonnes of Coconut were produced in India.

In 2007 3,900,000 tonnes of Orange were produced in India.

In 2007 2,001,400 tonnes of apples were produced in India.

The world's tallest flower is  the titan arum (Amorphophallus titanum), which rises to 3 m.

The fastest growing plant is Bamboo. Some species of bamboo can grow 1m height in a day. 

The slowest flowering plant is Queen of the Andes (Puya raimondii), it will take 150 years to flower.  

The world's smallest seed-bearing plant, the Watermeal (Wolffia arrhiza (L.) Wimm.), is 0.1 cm wide.

The biggest seed is produced by the double coconut palm (Lodoicea maldivica).

The size of the worlds largest leaves, which are found on the African raffia palm.

The size (5 cm)  of the dwarf willow, the worlds smallest tree which grows in the arctic tundra region.

The world's deadliest plant releases ricin, a poison that is 10,000 times more deadly than the venom of a rattlesnake. 

Cross section of Achyranthes aspera root. 

Santalum album L. 

Capparis zeylanica L. 

Allium cepa L. 

Bauhinia tomentosa L. 

Oleander

Oleander indica Medik.

 Mangifera indica L.

 Mangifera indica L.

Catharanthus roseus

Catharanthus roseus (L.) G. Don 

Lantana

Lantana camara L. - Verbenaceae

Scientific classification

Kingdom: Plantae

(unranked): Angiosperms

(unranked): Eudicots

(unranked): Asterids

Order: Gentianales

Family: Apocynaceae

Tribe: Plumeriae

Subtribe: Alstoniinae

Genus: Alstonia(L.) R.Br. 

Species: scholaris

 Alstonia scholaris  (L.) R.Br.- ( Devil tree )

                    The species Alstonia scholaris (L.) R.Br. was initially called as  Echites scholaris by Linnaeus in 1767. The generic name commemorates the distinguished botanist, Prof. C. Alston of Edinburgh, 1685-1760. The species name due to the usage of its timber for the slate making to the school children. 


 External page: http://en.wikipedia.org/wiki/Alstonia_scholaris

HERBARIUM

            A Herbarium is a collection of pressed and dried plant specimens, mounted on sheets bearing a label, arranged according to a sequence and available for reference or study. U.Elaya Perumal started his herbarium from the year 2009. Here he have given portion of his herbarium collection.

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