Xyridaceae (Fig. 5J, K, L). There is a great difference
between seedlings of Xyris and Orectanthe. The open cotyledonary
hypophyll of the Xyris seedling is broadened to a
narrow ovate blade (Fig. 5J, K). At the junction to the small
hyperphyllary haustorium, the cotyledon is sharply
recurved, the seed therefore is hidden below the end of
the hypophyllary blade. The series of plumular leaves
begins at once with ensiform (isobilateral) eophylls. The
distinct collar of the short hypocotyl bears dense rhizoids.
The weak primary root is soon replaced by a vigorous
shoot-born root