Flowering Trees: Pongamia pinnata (करंज)

Pongamia pinnata (Marathi: करंज) is mediun size tree. It is found everywhere in our campus. It is important larval host plant for number of butterflies such as Common Banded Awl (Hasora chromus), Common cerulean, Forget-me-not, Indian Sunbeam to name a few. Many Dark Ceruleans and Tailess Lineblue are seen nectoring on its flowers. It has  been seen flowering in months of December-Jan

The seeds after drying are used in bio-diesel making.

Flowers

Seeds	Leaves
Empty pupa of skipper on Pongamia pinnata

Flowering Trees: Red Silk Cotton Tree (शाल्मली / शेवर)

Flower of Red cotton silk tree

A large dark red/ magenta colored flower of "silk cotton tree" attracts every nature wanderer during summer trails. There exists a very similar species, white flowers is the sole difference. Flower with five petals blooms during spring months (January to March), while tree losses all its leaves as many other tree do. Many birds like drongo, jungle babbler, common crow etc. feed on the flowers. 


This native tree can grow up-to 30 m. Thorns on the stem and branches is its characteristic ID. Tree is largely famous as it bears its relation with a famous festival of Holi. In Konkan region, the decorated tree, decorated with Mango leaves and flowers, is worshiped.  Tree is then burnt in the night and Holi is celebrated. The availability of this tree is larger and confidently its leafless during the same month when Holi is celebrated. The fruits appear in the month of April may and has fiber inside. Often seen them flying with the hot summer winds. Fibers are used in the pillows by villagers. Wood is light and makes it use in building structures used in water. 

Quick Facts:

Common Name: Red Silk Cotton Tree (Sanskrit: शाल्मली / Marathi: शेवर)

Botanical Name: Bombax ceiba

Family: Baobab

Flowers: Large, red/magenta colored with 5 petals

Location on campus: All over academic area and hill side, a common tree.

Jungle Babbler feeding on Red Cotton Silk Tree

Flowering Trees - Cannon Ball Tree ( नागचाफा / कैलासपती)

 

Flower of Canon Ball Tree

Bunch of flowers and fruit string

Second in the flowering Tree series, is the post on "canon ball tree". It is listed as rare tree and flower in India [1]. It grows up-to 80 ft high and flowers in around December. Flower has six petals. Reddish inside and yellowish outside. Tremendously aromatic and smell can be felt strongly in near-by area. Inside structure is horizontal "U" shape. This inner structure is the reason it is offered to Lord Shiva and hence name in Marathi, as some thinks.

This Brazilian native takes its English name due to characteristic canon-ball like shape of its fruits. Fruits have rusty colored hard shell and are heavy. Number of fruits are connected in string and tree bears them directly to the trunk. The Cannonball Tree possesses antibiotic, anti-fungal, antiseptic and analgesic qualities [2] and hence used for medical purpose.

Quick Facts:
Common Name: Canon Ball Tree
Botanical Name: Couroupita guianensis
Family: Barringtonia
Marathi Name: कैलासपती / नागचाफा/ नागलिंग
Location on campus: Only one in parking lot near staff club.

Flower close-up

Ref:

1. http://www.flowersofindia.in/catalog/slides/Cannon%20Ball%20Tree.
2. http://en.wikipedia.org/wiki/Couroupita_guianensis

Flowering trees - Cassia fistula (बहावा)

grape bunches-like flowers

IIT Bombay hots many flowering trees, which are unusual to find in Mumbai city. This is the first article in the series of "flowering trees". The series will be covering details about some of impressive trees present on the campus. 

Tree for today is Cassia fistula, commonly known by Amaltaas / Golden shower tree or Indian Laburnum [1]. In Marathi it is named as 'Bahava' (बहावा). In Ayurvedic medicine, golden shower tree is known as aragvadha, meaning "disease killer" [2]. Its a tropical ornamental tree, may reach up-to 50 feet height. It is host plant LHP for Common emigrant and Mottled emigrant butterfly species. 

Golden shower tree is obvious name due to bright and cheerful display by thousands of fragrant small flower. Pendant like (grape bunches-like) bouquet of golden colored yellow flowers are eye catching. These flowers are attractive to bees and butterflies [1]. Flowering season for the tree is in the months of March to May. Sometimes the tree is seen without a single leaf when flowering. The golden shower tree is the national flower Thailand; its yellow flowers symbolize Thai Royalty [2]. Its also state flower of Kerala. A postal stamp was issued by the Indian Postal Department to commemorate this tree. 

Quick Facts:

Botanical Name: Cassia Fistula
Family:  Gulmohar

Flowering season: Late spring

Location on campus: Out side DRDO and QIP quarters.

Reference: 

1. http://www.flowersofindia.in/catalog/slides/Amaltas.html

2. http://en.wikipedia.org/wiki/Cassia_fistula