Children (11 direct children, 11 direct and indirect children):
Harperella
Piedmont mock bishopweed
Ptilimnium capillaceum
Herbwilliam
Ptilimnium fluviatile
Ptilimnium nuttallii
Laceflower
Ptilimnium viviparum
Ptilimnium ahlesii
Ptilimnium costatum
Ribbed mock bishopweed
Ptilimnium laciniata
Ptilimnium texense
Ptilimnium missouriense
Ptilimnium laciniatum