长颈瓶
3.Flowers unisexual, dioecious, solitary on spathe; male spathes broadly lanceolate, ca. 4 mm long; male flowers pediceled, tepals 3, elliptic, white, with black stripes, ca. 4 mm long, 2 mm wide; stamens 3, without filaments; female spathes broadly lanceolate, similar to a long neck flask, spirally twisted; female flowers without pedicels; ovary ovoid, 1-1.5 mm long.
4.Thus this stage is also described in alchemical texts as the blackening, the nigredo experience, and it is often pictured as a death process, as in the caput mortuum, the deaths head, or as some alchemical illustrations show, the alchemist dying within a flask.
5.It is a multicultural flask-shaped structure made up of a narrow neck and a swollen base (venter) that contains the female gamete.

