Children (8 direct children, 8 direct and indirect children):
Sagittaria graminea subsp. chapmanii
Sagittaria graminea subsp. graminea
Sagittaria graminea subsp. weatherbiana
Sagittaria graminea var. chapmanii
Sagittaria graminea var. platyphylla
Sagittaria graminea var. macrocarpa
Sagittaria graminea var. graminea
Sagittaria graminea var. weatherbiana