Hypericum

Hypericum cistifolium Lam.   roundpod St. Johnswort   (LA)
Hypericum crux-andreae (L.) Crantz   St. Peterswort   (LA, AR, OK)
Hypericum densiflorum Pursh   bushy St. Johnswort   (LA, OK)
Hypericum drummondii (Grev. & Hook.) Torr. & A. Gray   nits and lice   (LA, AR, OK)
Hypericum frondosum Michx.   cedarglade St. Johnswort   (LA)
Hypericum galioides Lam.   bedstraw St. Johnswort   (LA)
Hypericum gentianoides (L.) Britton, Sterns & Poggenb.   orangegrass   (LA, AR, OK)
Hypericum gymnanthum Engelm. & A. Gray   claspingleaf St. Johnswort   (LA, AR)
Hypericum hypericoides (L.) Crantz   St. Andrew's cross   (LA, AR, OK)
    Hypericum hypericoides (L.) Crantz ssp. hypericoides   St. Andrew's cross   (LA, AR, OK)
    Hypericum hypericoides (L.) Crantz ssp. multicaule (Michx. ex Willd.) N. Robson   St. Andrew's cross   (LA, AR, OK)
Hypericum lobocarpum Gattinger ex J.M. Coult.   fivelobe St. Johnswort   (LA, AR, OK)
Hypericum mutilum L.   dwarf St. Johnswort   (LA, AR, OK)
Hypericum nudiflorum Michx. ex Willd.   early St. Johnswort   (LA, AR, OK)
Hypericum pauciflorum Kunth   fewflower St. Johnswort   (TX)
Hypericum perforatum L.   common St. Johnswort   (LA, AR, OK, NM)
Hypericum prolificum L.   shrubby St. Johnswort   (LA, AR, OK)
Hypericum pseudomaculatum Bush   false spotted St. Johnswort   (LA, AR, OK)
Hypericum punctatum Lam.   spotted St. Johnswort   (LA, AR, OK)
Hypericum setosum L.   hairy St. Johnswort   (LA)
Hypericum sphaerocarpum Michx.   roundseed St. Johnswort   (LA, AR, OK)

Triadenum

Triadenum tubulosum (Walter) Gleason   lesser marsh St. Johnswort   (LA, AR, OK)
Triadenum virginicum (L.) Raf.   Virginia marsh St. Johnswort   (LA, OK)
Triadenum walteri (J.G. Gmel.) Gleason   greater marsh St. Johnswort   (LA, AR, OK)