Canada's Plant Hardiness Site

Rubiaceae madder family
Houstonia longifolia Gaertn.
En: longleaf bluet, longleaf summer bluet, slenderleaf bluet;
Fr: houstonie a longues feuilles

• [=Chamisme longifolia (Gaertn.) Nieuwl.]
• [=Hedyotis longifolia (Gaertn.) Hook.]
• [=Hedyotis longifolia (Gaertn.) Hook. var. tenuifolia (Nutt.) Torr. & A.Gray]
• [=Hedyotis nuttalliana Fosberg]
• [=Hedyotis purpurea (L.) Torr. & A.Gray var. longifolia (Gaertn.) Fosberg]
• [=Hedyotis purpurea (L.) Torr. & A.Gray var. tenuifolia (Nutt.) Fosberg]
• [=Houstonia longifolia Gaertn. var. compacta Terrell]
• [=Houstonia longifolia Gaertn. var. glabra Terrell]
• [=Houstonia longifolia Gaertn. var. tenuifolia (Nutt.) Alph.Wood]
• [=Houstonia purpurea L. var. tenuifolia (Nutt.) A.Gray]
• [=Houstonia tenuifolia Nutt.]
• [=Oldenlandia purpurea (L.) A.Gray var. longifolia (Gaertn.) A.Gray]
• [=Oldenlandia purpurea (L.) A.Gray var. tenuifolia (Nutt.) A.Gray ex Chapm.]