“Each flower, surrounded by a thin membraneous sheath, topped a short pedicel that elongated during the last stages of flower development up to anthesis.”
“The picture shows the brown remains of a membraneous sheath at the base of the leaf.”
“At birth, however, the interatrial foramen is closed by a membraneous flap, and oxygen-depleted blood from the body enters the right atrium, is channelled into the right ventricle, and thence to the lungs for oxygenating.”