Green Tara is considered by the Tibetans to be the original Tara. Her green complexion signifies her association with the Buddha clan of Amoghasiddhi, the Cosmic Buddha of the north. She is considered as most dynamic manifestation of Tara. Moreover she is honored as the "Mother of the Buddhas of all three times". It is believed that she incarnated in the Nepalese queen of the great Tibetan king sRong-tsan-sgam-po.
The goddess Green Tara is shown in the present painting seated in lalitasana on a beautiful lotus, emerged from a lake. Her right leg is pendant on a tiny lotus and the leg is folded into her lap. Her right hand is in the varada-mudra of presenting a boon, while her left hand is in the attitude of protection and holding a lotus by its long stem. The goddess has a young and beautiful face; her body is slim and slender. Her facial expression conveys love and compassion. Her hair is partly upswept in knots with decoration on it and partly falls on her shoulders. Her serene eyes are half-opened, and there is a small circle between the eyebrows. Her lips are painted red. There are three lines (trivali) on her neck. She is dressed like a Bodhisattva and wears the thirteen ornaments and five-leaved crown with gemstones. She wears a beautiful red dhoti with blue outer garment, decorated with beautiful designs in gold. There is a mandorla and halo behind her body and head, respectively.
The upper corners of the painting are filled with green and pink clouds; sun and moon with stars. The middle and foreground are filled with green mountainous landscape, high peak covered with snow, yellowish clouds, lakes, trees, flowers, stylized rocks, pink clouds and auspicious offerings. The figure is brilliantly drawn and painted. The present thangka is very much suitable for sadhana of the great goddess Green Tara
This description by Dr. Shailendra Kumar Verma, Ph.D. His doctorate thesis being on the "Emergence and Evolution of the Buddha Image (From its inception to 8th century A.D)."