Individuals with asthma do not show this triangular chink.
It is pretty in borders, and grows to perfection on walls, and the tufts, when emerging from some chink in a fortress wall where rain never falls upon them, are often as full of flower as when planted in fertile soil.
Plants placed between blocks of stone thrive if there is a good depth of soil in the chink and the soil is moist.
A classic finding is that the vocal cords move toward each other when the individual inhales, leaving a small triangular hole or chink at the back of the larynx.
When on the watch for prey the spider slightly raises the lid and, peeping through the chink, darts like a flash upon any beetle or fly that unwittingly passes within reach.