Those who have gone through high school science will remember lab-experiments involving indicators. Adding a drop of phenolphthalein and noting that critical point at which the colourless liquid in the flask turned a bright pink. Or when the litmus paper turned red or blue. Remember how critical it was for our grades to observe these colour changes correctly? As a B.Sc Chemistry student, indicators played a pretty large part in my life!
Those colour changes are what my experiences with butterfly-pea tea took me back to. This tea has been much in vogue for some time now. But keeping in character, I am of course about two years behind the trend.
This in spite of having the creeper literally at my doorstep. Planted there to supply flowers for my mother’s puja– the shankpushpi flower is specially a favorite of Lord Shiva–it has proven itself a hardy survivor of my spurts of inept gardening. It grows and flowers and flourishes. The indigo-blue flowers are equally beautiful on the plant and in the puja.
Clitoria ternatea commonly known as Asian pigeonwings, bluebellvine, blue pea, butterfly pea or Darwin pea, is known for its blue flowers, though there is a less common white variant. In India, it is called shankpusham, girikarnika or aprajita.
Here it is used mainly for worship and to some extent in Ayurveda, mainly for de-stressing, and to boost memory and brain function.
The use in Southeast Asia is more varied. It is an integral part of many Thai, Malaysian and Burmese recipes as an ingredient and as a colouring agent, and is very widely used in Chinese medicines.
Which brings me to the visually-stunning butterfly-pea tea, which is a wildly popular drink in those countries (and now the world). Made by steeping a handful of flowers (fresh or dry) in hot water, the resulting tea is a lovely blue. Squeeze a lemon into it, and it turns pink or even violet—taking you right back to your school lab! It is basically the same phenomenon—a change in pH resulting in a change in colour.
Research on the use of Butterfly Pea in managing Alzheimer’s has been ongoing for some time now. The latest is a research study from National Centre for Biological Sciences, India, published in Journal of Medicinal Chemistry, which takes forward the hypothesis that extracts from this plant ‘can help in neuroprotection and prevent progressions that cause the ailment’.
So go ahead and plant a shankpushi in your garden or a pot—only making sure that it gets enough sun. It is not at all difficult to grow—my creeper sheds seeds all around, and each week, I find tens of little plants wanting to curl around the nearest support and climb. It will do well in most soils, even enriching them, as it is leguminous and will fix nitrogen. Apart from watering it once in a while, you don’t need to do much.
And in return, it will add beauty to your garden, adorn your puja room, help you make conversation-piece teas, salad additions and coloured rice. And hopefully also boost your brain-power. A winning proposition all around!