Yogasana closes the Gheranda Samhita's posture list. The feet are turned up onto the thighs, the hands turned up on the knees, and the breath drawn in and held. The description is short, and it is the only entry in the list that includes the breath as part of the posture itself rather than leaving breath work to a later lesson.
The name is the practice's own. Where the other thirty one are named for animals, objects, qualities or people, this one is called simply the posture of yoga, and the text presents it as the arrangement in which yoga proper is performed rather than as one more shape beside the others.
Its position at the end of the list is part of the framing. The Gheranda Samhita is organised as seven lessons, a progressive scheme running from purification through posture, seals, withdrawal, breath, meditation and finally absorption, and the posture lesson ends by handing the practitioner to what comes next. Placing an entry named for the whole practice in the final slot marks the transition. The Hatha Yoga Pradipika, which is organised differently, gives that role to siddhasana instead, elevating it above the other fourteen as the seat always to be practised.
The seven lessons of the Gheranda Samhita are ordered as a course of preparation: cleansing, posture, the seals, the withdrawal of the senses, breath restraint, meditation and absorption. Naming the text a book of the body made ready, rather than a book of postures, describes it more accurately, and the placement of yogasana at the close of the second lesson is the point at which the reader is handed on to the rest.