| Hackelia americana (A.Gray) Fernald |
Synonym |
 |
WCSP (in review) |
| Hackelia amethystina Howell |
Unresolved |
 |
WCSP (in review) |
| Hackelia andicola (Krause) Brand |
Accepted |
 |
TRO |
| Hackelia angustifolia Vasey ex Beal |
Synonym |
 |
TRO |
| Hackelia arida (Piper) I.M. Johnst. |
Synonym |
 |
TRO |
| Hackelia arida var. cusickii (Piper) I.M. Johnst. |
Synonym |
 |
TRO |
| Hackelia bella (J.F. Macbr.) I.M. Johnst. |
Accepted |
 |
TRO |
| Hackelia besseyi (Rydb.) J.L. Gentry |
Accepted |
 |
TRO |
| Hackelia bhutanica R.R.Mill |
Unresolved |
 |
WCSP (in review) |
| Hackelia brachytuba (Diels) I.M.Johnst. |
Accepted |
 |
WCSP (in review) |
| Hackelia brevicula (Jeps.) J.L. Gentry |
Accepted |
 |
TRO |
| Hackelia californica (A. Gray) I.M. Johnst. |
Accepted |
 |
TRO |
| Hackelia ciliata (Douglas ex Lehm.) I.M.Johnst. |
Accepted |
 |
WCSP (in review) |
| Hackelia cinerea (Piper) I.M. Johnst. |
Accepted |
 |
TRO |
| Hackelia coerulescens (Rydb.) Brand |
Accepted |
 |
TRO |
| Hackelia costaricensis (Brand) I.M.Johnst. |
Synonym |
 |
WCSP (in review) |
| Hackelia cottonii (Piper) Brand |
Synonym |
 |
TRO |
| Hackelia cronquistii J.L.Gentry |
Unresolved |
 |
WCSP (in review) |
| Hackelia cusickii (Piper) Brand |
Accepted |
 |
TRO |
| Hackelia davisii Cronquist |
Unresolved |
 |
WCSP (in review) |
| Hackelia deflexa Opiz |
Unresolved |
 |
WCSP (in review) |
| Hackelia deflexa var. americana (A.Gray) Fernald & I.M.Johnst. |
Unresolved |
 |
WCSP (in review) |
| Hackelia deflexa subsp. americana (A.Gray) Hultén |
Synonym |
 |
WCSP (in review) |
| Hackelia deflexa subsp. americana (A. Gray) Á. Löve & D. Löve |
Synonym |
 |
TRO |
| Hackelia dielsii (Brand) I.M.Johnst. |
Synonym |
 |
WCSP (in review) |
| Hackelia difformis (Y.S.Lian & J.Q.Wang) Riedl |
Accepted |
 |
WCSP (in review) |
| Hackelia diffusa (Douglas ex Lehm.) I.M.Johnst. |
Accepted |
 |
WCSP (in review) |
| Hackelia diffusa var. arida (Piper) R.L. Carr |
Accepted |
 |
TRO |
| Hackelia diffusa var. coerulescens (Rydb.) I.M. Johnst. |
Synonym |
 |
TRO |
| Hackelia diffusa var. cottonii (Piper) R.L. Carr |
Accepted |
 |
TRO |
| Hackelia eastwoodiae I.M.Johnst. |
Unresolved |
 |
WCSP (in review) |
| Hackelia echinocarya I.M. Johnst. |
Synonym |
 |
TRO |
| Hackelia elegans Brand |
Unresolved |
 |
WCSP (in review) |
| Hackelia floribunda (Lehm.) I.M. Johnst. |
Accepted |
 |
TRO |
| Hackelia floribunda var. pinetorum (Greene ex A. Gray) Brand |
Accepted |
 |
TRO |
| Hackelia glochidiata (A.DC.) Brand |
Unresolved |
 |
WCSP (in review) |
| Hackelia gracilenta (Eastw.) I.M. Johnst. |
Accepted |
 |
TRO |
| Hackelia grisea (Wooton & Standl.) I.M. Johnst. |
Accepted |
 |
TRO |
| Hackelia guatemalensis (Brand) Brand |
Synonym |
 |
TRO |
| Hackelia heliocarpa (Brand) Brand |
Unresolved |
 |
WCSP (in review) |
| Hackelia hendersonii (Piper) Brand |
Accepted |
 |
TRO |
| Hackelia hendersonii var. trachyphylla (Piper) Brand |
Accepted |
 |
TRO |
| Hackelia hirsuta (Wooton & Standl.) I.M. Johnst. |
Accepted |
 |
TRO |
| Hackelia hispida (A. Gray) I.M. Johnst. |
Accepted |
 |
TRO |
| Hackelia ibapensis L.M.Shultz & J.S.Shultz |
Unresolved |
 |
WCSP (in review) |
| Hackelia jessicae (E.A. McGregor) Brand |
Synonym |
 |
TRO |
| Hackelia leonotis I.M. Johnst. |
Accepted |
 |
TRO |
| Hackelia leptophylla (Rydb.) I.M. Johnst. |
Accepted |
 |
TRO |
| Hackelia leptophylla var. besseyi (Rydb.) Brand |
Synonym |
 |
TRO |
| Hackelia leucantha (Greene) Brand |
Accepted |
 |
TRO |
| Hackelia longituba I.M.Johnst. |
Unresolved |
 |
WCSP (in review) |
| Hackelia macrophylla I.M.Johnst. |
Unresolved |
 |
WCSP (in review) |
| Hackelia matsudairae (Makino) Ohwi |
Unresolved |
 |
WCSP (in review) |
| Hackelia meeboldii Brand |
Unresolved |
 |
WCSP (in review) |
| Hackelia mexicana (Schltdl. & Cham.) I.M.Johnst. |
Accepted |
 |
WCSP (in review) |
| Hackelia micrantha (Eastw.) J.L. Gentry |
Accepted |
 |
TRO |
| Hackelia minima Brand |
Synonym |
 |
WCSP (in review) |
| Hackelia mundula (Jeps.) R.S. Ferris |
Accepted |
 |
TRO |
| Hackelia murgabica Czukav. |
Unresolved |
 |
WCSP (in review) |
| Hackelia nelsonii Brand |
Unresolved |
 |
WCSP (in review) |
| Hackelia nervosa (Kellogg) I.M. Johnst. |
Accepted |
 |
TRO |
| Hackelia nipponica Brand |
Unresolved |
 |
WCSP (in review) |
| Hackelia obtusifolia R.R.Mill |
Unresolved |
 |
WCSP (in review) |
| Hackelia ophiobia R.L.Carr |
Unresolved |
 |
WCSP (in review) |
| Hackelia pamirica (B. Fedtsch.) Brand |
Synonym |
 |
TRO |
| Hackelia parviflora (Krause) Brand |
Accepted |
 |
TRO |
| Hackelia patens (Nutt.) I.M. Johnst. |
Accepted |
 |
TRO |
| Hackelia patens var. semiglabra Cronquist |
Unresolved |
 |
WCSP (in review) |
| Hackelia pinetorum (Greene ex A. Gray) I.M. Johnst. |
Accepted |
 |
TRO |
| Hackelia popovii Czukav. |
Unresolved |
 |
WCSP (in review) |
| Hackelia rattanii (Brand) Brand |
Accepted |
 |
TRO |
| Hackelia revoluta (Ruiz & Pav.) I.M. Johnst. |
Accepted |
 |
TRO |
| Hackelia revoluta f. fiebrigii Brand |
Synonym |
 |
TRO |
| Hackelia revoluta f. ovatifolia (Griseb.) Brand |
Synonym |
 |
TRO |
| Hackelia roylei (Wall. ex G.Don) I.M.Johnst. |
Unresolved |
 |
WCSP (in review) |
| Hackelia saxatilis (Piper) Brand |
Accepted |
 |
TRO |
| Hackelia scaberrima (Piper) Brand |
Accepted |
 |
TRO |
| Hackelia scaberrima var. angustata (Rydb.) Brand |
Accepted |
 |
TRO |
| Hackelia setosa (Piper) I.M. Johnst. |
Accepted |
 |
TRO |
| Hackelia sharsmithii I.M. Johnst. |
Synonym |
 |
TRO |
| Hackelia skutchii I.M. Johnst. |
Accepted |
 |
TRO |
| Hackelia standleyi Brand |
Unresolved |
 |
TRO |
| Hackelia stellata Pohl ex Griseb. |
Unresolved |
 |
WCSP (in review) |
| Hackelia stewartii I.M.Johnst. |
Unresolved |
 |
WCSP (in review) |
| Hackelia stricta I.M. Johnst. |
Synonym |
 |
TRO |
| Hackelia thymifolia (A. DC.) I.M. Johnst. |
Synonym |
 |
TRO |
| Hackelia uncinata (Benth.) C.E.C.Fisch. |
Accepted |
 |
WCSP (in review) |
| Hackelia ursina (A. Gray) I.M. Johnst. |
Accepted |
 |
TRO |
| Hackelia ursina var. pustulata (J.F. Macbr.) J.L. Gentry |
Accepted |
 |
TRO |
| Hackelia velutina (Piper) I.M. Johnst. |
Accepted |
 |
TRO |
| Hackelia venusta (Piper) H. St. John |
Accepted |
 |
TRO |
| Hackelia virginiana (L.) I.M. Johnst. |
Accepted |
 |
TRO |