Xyrid clade (Fig. 5)
Mayacaceae (Fig. 5A–C). The cotyledon of the small
Mayaca seedling is reduced to its haustorial part completely
hidden inside the seed. It is attached to the cotyledonary
node without any sign of a cotyledonary sheath. At the
root pole there is no radicle, and therefore no primary
root can develop. The first plumular leaf is a pale scale-like
cataphyll, followed by simple-shaped green eophylls. The
first shoot-born root breaks through only several weeks
after germination has commenced.