Hypericum acutifolium Ell.. Synonymy:   Hypericum denticulatum var. acutifolium (Ell.) Blake, Hypericum denticulatum var. recognitum Fern. & Schub.
Hypericum adpressum Raf. ex W. Bart. - Creeping st. john's-wort. 
Hypericum anagalloides Cham. & Schlecht. - Tinker's-penny.  Present in the CalFlora Database (California distribution map). Photographs (2) from CalPhotos.
Hypericum androsaemum L..
Hypericum ascyron L. - Great st. john's-wort.  Synonymy:   Hypericum pyramidatum Ait.
Hypericum boreale (Britt.) Bickn. - Northern st. john's-wort.  Synonymy:   Hypericum mutilum ssp. boreale (Britt.) J. Gillett
Hypericum brachyphyllum (Spach) Steud. - Coastal-plain st. john's-wort.  Synonymy:   Hypericum aspalathoides Willd. p.p.
Hypericum buckleii M.A. Curtis.
Hypericum calycinum L. - Aaron's-beard. 
Hypericum canadense L. - Lesser canadian st. john's-wort.  Synonymy:   Hypericum canadense var. galiiforme Fern., Hypericum canadense var. magninsulare Weatherby
Hypericum canariense L. - Canary island st. john's-wort.  Present in the CalFlora Database (California distribution map).
Hypericum chapmanii P. Adams - Apalachicola st. john's-wort. 
Hypericum cistifolium Lam. - Round-pod st. john's-wort.  Present in the Texas flora and known locally as: Roundpod St. Johns-Wort  (Texas Distribution by vegetation zone). Synonymy:   Hypericum opacum Torr. & Gray
Hypericum concinnum Benth. - Goldwire.  Present in the CalFlora Database (California distribution map). Photographs (3) from CalPhotos.
Hypericum crux-andreae (L.) Crantz - St. peter's-wort.  Present in the Texas flora, no local name.  (Texas Distribution by vegetation zone). Image available from the Vascular Plant Image Gallery. Synonymy:   Ascyrum crux-andreae L., Ascyrum cuneifolium Chapman, Ascyrum stans Michx. ex Willd., Hypericum stans (Michx. ex Willd.) P. Adams & Robson
Hypericum cumulicola (Small) P. Adams - Highlands scrub st. john's-wort.  Listed by the U.S. FWS as endangered, the FWS local name is Highlands scrub hypericum and the FWS range is: U.S.A. (FL). FWS Listing information: volume 52 Federal Register 2234; January 21, 1987. More information available from the Center For Plant Conservation. Synonymy:   Sanidophyllum cumulicola Small
Hypericum densiflorum Pursh - Bushy st. john's-wort.  Present in the Texas flora, no local name.  (Texas Distribution by vegetation zone). Synonymy:   Hypericum glomeratum Small
Hypericum denticulatum Walt. - Coppery st. john's-wort.  Synonymy:   Hypericum denticulatum var. ovalifolium (Britt.) Blake, Hypericum virgatum Lam.
Hypericum diosmoides Griseb. - Puerto rico st. john's-wort. 
Hypericum dissimulatum Bickn. - Disguised st. john's-wort. 
Hypericum dolabriforme Vent. - Straggling st. john's-wort.  Synonymy:   Hypericum bissellii B.L. Robins.
Hypericum drummondii (Grev. & Hook.) Torr. & Gray - Nits-and-lice.  Present in the Texas flora and known locally as: Drummond St. Johns-Wort, nits-and-lice  (Texas Distribution by vegetation zone). Synonymy:   Sarothra drummondii Grev. & Hook.
Hypericum edisonianum (Small) P. Adams & Robson - Arcadian st. john's-wort.  Synonymy:   Ascyrum edisonianum Small
Hypericum ellipticum Hook. - Pale st. john's-wort. 
Hypericum exile P. Adams - Florida sands st. john's-wort. 
Hypericum fasciculatum Lam. - Peel-bark st. john's-wort.  Present in the Texas flora and known locally as: Sandweed  (Texas Distribution by vegetation zone).
Hypericum frondosum Michx. - Cedar-glade st. john's-wort.  Present in the Texas flora and known locally as: Golden St. Johns-wort  (Texas Distribution by vegetation zone). Synonymy:   Hypericum aureum Bartr., Hypericum splendens Small
Hypericum galioides Lam. - Bedstraw st. john's-wort.  Present in the Texas flora and known locally as: Bedstraw St. Johns-wort  (Texas Distribution by vegetation zone). Synonymy:   Hypericum ambiguum Ell., Hypericum galioides var. pallidum C. Mohr
Hypericum gentianoides (L.) B.S.P. - Orange-grass.  Present in the Texas flora and known locally as: Pineweed St. Johns-wort, orange grass, pineweed  (Texas Distribution by vegetation zone). Synonymy:   Sarothra gentianoides L.
Hypericum gramineum G. Forst. - Grassy st. john's-wort. 
Hypericum graveolens Buckl. - Mountain st. john's-wort. 
Hypericum gymnanthum Engelm. & Gray - Clasping-leaf st. john's-wort.  Present in the Texas flora and known locally as: Clasping St. Johns-wort  (Texas Distribution by vegetation zone).
Hypericum harperi R. Keller - Sharp-lobe st. john's-wort. 
Hypericum humifusum L. - Trailing st. john's-wort. 
Hypericum hypericoides (L.) Crantz - St. andrew's-cross.  Images available from the Vascular Plant Image Gallery.
Hypericum kalmianum L. - Kalm's st. john's-wort. 
Hypericum lissophloeus P. Adams - Smooth-bark st. john's-wort. 
Hypericum lloydii (Svens.) P. Adams - Sandhill st. john's-wort. 
Hypericum lobocarpum Gattinger - Five-lobe st. john's-wort.  Present in the Texas flora and known locally as: Fivelobe St. Johns-Wort  (Texas Distribution by vegetation zone). Synonymy:   Hypericum densiflorum var. lobocarpum (Gattinger) Svens., Hypericum oklahomense Palmer
Hypericum majus (Gray) Britt. - Greater canadian st. john's-wort.  Synonymy:   Hypericum canadense var. majus Gray
Hypericum microsepalum (Torr. & Gray) Gray ex S. Wats. - Flatwoods st. john's-wort.  Synonymy:   Crookea microsepala (Torr. & Gray) Small
Hypericum mitchellianum Rydb. - Blue ridge st. john's-wort. 
Hypericum X moserianum Luquet ex André [calycinum X patulum].
Hypericum mutilum L. - Dwarf st. john's-wort.  Present in the Texas flora and known locally as: Dwarf St. Johns-wort  (Texas Distribution by vegetation zone). Present in the CalFlora Database (California distribution map).  Images available from the Vascular Plant Image Gallery. Synonymy:   Hypericum mutilum var. latisepalum Fern., Hypericum mutilum var. parviflorum (Willd.) Fern.
Hypericum myrtifolium Lam. - Myrtle-leaf st. john's-wort. 
Hypericum nitidum Lam. - Carolina st. john's-wort. 
Hypericum nudiflorum Michx. ex Willd. - Early st. john's-wort.  Present in the Texas flora, no local name.  (Texas Distribution by vegetation zone). Synonymy:   Hypericum apocynifolium Small
Hypericum parvulum Greene - Sierra madre st. john's-wort.  Synonymy:   Hypericum degeneri Fosberg
Hypericum pauciflorum Kunth - Few-flower st. john's-wort.  Present in the Texas flora and known locally as: Fewflower St. Johns-wort  (Texas Distribution by vegetation zone).
Hypericum perforatum L. - Common st. john's-wort.  Present in the Texas flora and known locally as: Common St. Johns-wort  (Texas Distribution by vegetation zone). Present in the CalFlora Database (California distribution map). A photograph from CalPhotos. Image available from the Vascular Plant Image Gallery.
Hypericum prolificum L. - Shrubby st. john's-wort.  Present in the Texas flora and known locally as: Shrubby St. Johns-wort  (Texas Distribution by vegetation zone). Synonymy:   Hypericum spathulatum (Spach) Steud.
Hypericum pseudomaculatum Bush - False spotted st. john's-wort.  Present in the Texas flora and known locally as: Falsespotted St. Johns-wort  (Texas Distribution by vegetation zone). Synonymy:   Hypericum punctatum var. pseudomaculatum (Bush) Fern.
Hypericum punctatum Lam. - Spotted st. john's-wort.  Present in the Texas flora and known locally as: Spotted St. Johns-wort  (Texas Distribution by vegetation zone). Synonymy:   Hypericum subpetiolatum Bickn. ex Small
Hypericum reductum (Svens.) P. Adams - Atlantic st. john's-wort.  Synonymy:   Hypericum aspalathoides Willd. p.p.
Hypericum scouleri Hook. - Scouler's st. john's-wort. 
Hypericum setosum L. - Hairy st. john's-wort.  Present in the Texas flora and known locally as: Hairy St. Johns-wort  (Texas Distribution by vegetation zone).
Hypericum sphaerocarpum Michx. - Round-seed st. john's-wort.  Present in the Texas flora and known locally as: Roundseed St. Johns-wort  (Texas Distribution by vegetation zone). Synonymy:   Hypericum sphaerocarpum var. turgidum (Small) Svens., Hypericum turgidum Small
Hypericum suffruticosum P. Adams & Robson - Pineland st. john's-wort.  Synonymy:   Ascyrum pumilum Michx.
Hypericum tetrapetalum Lam. - Four-petal st. john's-wort.  Synonymy:   Ascyrum tetrapetalum (Lam.) Vail
Triadenum fraseri (Spach) Gleason - Fraser's marsh-st. john's-wort.  Synonymy:   Elodea fraseri Spach, Hypericum virginicum var. fraseri (Spach) Fern., Triadenum virginicum ssp. fraseri (Spach) J. Gillett, Triadenum virginicum var. fraseri (Spach) Cooperrider
Triadenum tubulosum (Walt.) Gleason - Lesser marsh-st. john's-wort.  Present in the Texas flora and known locally as: Turf S.  (Texas Distribution by vegetation zone). Synonymy:   Hypericum tubulosum Walt., Triadenum longifolium Small
Triadenum virginicum (L.) Raf. - Virginia marsh-st. john's-wort.  Present in the Texas flora and known locally as: Marsh S., Virginia S.  (Texas Distribution by vegetation zone). Synonymy:   Hypericum virginicum L.
Triadenum walteri (J.G. Gmel.) Gleason - Greater marsh-st. john's-wort.  Present in the Texas flora and known locally as: Stemmed S., marsh s.  (Texas Distribution by vegetation zone). Synonymy:   Hypericum petiolatum Walt., non L., Hypericum tubulosum var. walteri (J.G. Gmel.) Lott, Hypericum walteri J.G. Gmel., Triadenum petiolatum (Walt.) Britt., Triadenum tubulosum var. walteri (J.G. Gmel.) Cooperrider