Flora of New York/Hypericaceae, Podostemaceae, Elatinaceae

← Oxalidales	Flora of New York — Malpighiales (1) Hypericaceae, Podostemaceae, Elatinaceae				→ Malpighiales (2) Violaceae
	Table of contents	Genus index	Protected species index	Invasive species index

The Malpighiales ... as described in the Angiosperm Phylogeny Website

Order	Family	Subfamily	Tribe	Genus	Common names	#
Malpighiales	Hypericaceae	—	Hypericeae	Triadenum	marsh St. John's wort	2
	Hypericaceae	—	Hypericeae	Hypericum	St. John's wort	18
	Podostemaceae	Podostemoideae	—	Podostemum	river weed	1
	Elatinaceae	—	—	Elatine	water wort	3
	Violaceae	Violoideae	Violeae	Hybanthus	greenviolet	1
	Violaceae	Violoideae	Violeae	Viola	violet	57
	Salicaceae	Salicoideae	—	Populus	cottonwood, aspen, poplar	11
	Salicaceae	Salicoideae	—	Salix	willow	36
	Euphorbiaceae	Acalyphoideae	Acalypheae	Acalypha	copperleaf, three-seed mercury	4
				Mercurialis	herb mercury	1
				Ricinus	castor bean	1
		Crotonoideae	Crotoneae	Croton	rushfoil, hogwort	1
		Euphorbioideae	Euphorbieae	Euphorbia	spurge, sandmat	21
	Linaceae	Linoideae	Lineae	Linum	flax	9

Family Hypericaceae[edit]

The Hypericaceae (St. John's-wort family) is sometimes included in the Clusiaceae.^[1]

↑ Clusiaceae Troy Weldy & David Werier (2013) New York Flora Atlas. New York Flora Association, Albany, New York.

Tribe Hypericeae[edit]

Triadenum[edit]

Malpighiales — Hypericaceae — Hypericeae — Triadenum
Triadenum	Marsh St. Johnswort	N.Y. Status	Images	Distribution	NY NPT
Triadenum virginicum (L.) Raf. yyyy. Hypericum virginicum L. yyyy. Triadenum virginicum (L.) Raf.	Marsh St. John's wort, Virginia marsh St. John's wort	Native, Secure			NYFA-5 USDA-NN NPT Can ITIS LBJ Images, wsp
Triadenum fraseri (Spach) Gleason	Fraser's marsh St. Johnswort	Native, Secure			NYFA-5 USDA-NN NPT ITIS Images, wsp

Hypericum[edit]

The genus Hypericum is organized here into sections as treated by Robson (2016).^[1] The name Hypericum was derived from the Greek hyper (above) and eikon (picture), possibly indicating that the flowers of these plants were hung above pictures or windows.

↑ Norman K.B. Robson (2016) Flora of North America, Volume 6, 24-Apr-2016

Hypericum sect. Brathys[edit]

Robson describes this group as an "informal sect. group." It combines the New York Hypericum species which were previously placed in sections Brathys and Trigynobrathys.

Malpighiales — Hypericaceae — Hypericeae — Hypericum sect. Brathys
Hypericum sect. Brathys	St. John's-wort	N.Y. Status	Images	Distribution	NY NPT
Hypericum mutilum L. 1753. Hypericum mutilum L.	Dwarf St. John's-wort	Native, C:6, Secure			NYFA-5 USDA-NN NPT ARS Trop. Images, wsp
Hypericum boreale (Britton) E.P.Bicknell 1891. H. canadense var. boreale 1895. H. boreale (Britton) E.P.Bicknell 1895. H. mutilum var. boreale 1979. H. mutilum ssp. boreale	Northern St. Johnswort, Northern St. John's-wort	Native, C:7, Secure			NYFA-5 USDA-NN NPT Can ARS ITIS Trop. Images, wsp
Hypericum majus (A.Gray) Britton 1867. H. canadense var. majus 1894. H. majus (A.Gray) Britton 1908. H. mutilum var. longifolium 1951. H. blackstonioides Obern. (i) 1951. Sarothra major (A. Gray) Y.Kimura	Greater Canadian St. John's-wort, Larger Canadian St. John's-wort, Large St. Johnswort	Native, C:6, Secure			NYFA-5 USDA-NN ARS FNA Trop. Images, wsp
Hypericum canadense L.	Lesser Canadian St. John's wort, Lesser Canadian St. Johnswort, Canadian St. John's-wort, Lesser St. Johns-wort	Native, C:6, Secure			NYFA-5 USDA-NN NPT ARS Images, wsp
Hypericum gentianoides (L.) Britton, Sterns & Poggenb.	Orangegrass, Orange-grass St. John's-wort, Pineweed	Native, C:4, Secure			NYFA-5 USDA-NN ARS Images, wsp
Hypericum denticulatum Walter	Coppery St. Johnswort, Coppery St. John's-wort	Native, C:10, Endangered, NYNHP: 1^[1]			NYFA-1 USDA-N0 ARS Images, wsp
Hypericum × dissimulatum E.P.Bicknell (pro. sp.) Hypericum boreale × Hypericum canadense 1895. Hypericum canadense var. parvicarpum E.P.Bicknell 1913. H. dissimulatum E.P.Bicknell	Disguised St. John's-wort	Native, Endangered			NYFA-1? USDA-NN NPT ITIS Trop. Images, wsp
Hypericum sect. Brathys (excluded taxa)	St. John's-wort	N.Y. Status	Images	Distribution	NY NPT
Hypericum gymnanthum Engelm. & A.Gray	Claspingleaf St. John's-wort, Clasping-leaved St. John's-wort	N. America native, N.Y. excluded			NYFA-XCLD USDA-N0 ARS ITIS Images, wsp
↑ New York Natural Heritage Program. 2016. Online Conservation Guide for Hypericum denticulatum. Endangered, S1/G5.

Hypericum sect. Myriandra[edit]

The species of Hypericum sect. Myriandra are shrubs or subshrubs.^[1]

↑ Norman K. B. Robson. Hypericum sect. Myriandra (Spach) R. Keller Flora of North America 6:7 Hypericaceae

Malpighiales — Hypericaceae — Hypericeae — Hypericum sect. Myriandra
Hypericum sect. Myriandra	St. John's-wort	N.Y. Status	Images	Distribution	NY NPT
Hypericum ellipticum Hook. 1831. H. ellipticum Hook. 1836. Brathydium canadense Spach 1840. H. brathydium Steudel 1908. H. canadense var. oviforme	Pale St. Johnswort, Pale St. John's-wort, Elliptic St. John's-wort, Elliptic-leaved St. John's-wort Millepertuis elliptique	Native, C:6, Secure OBL Perennial, Herb-forb			NYFA-5 USDA-NN NPT Can ARS ITIS FNA Trop. NSE BNA Images, wsp
Hypericum prolificum L. 1767. H. prolificum L. 1836. Myriandra ledifolia Spach 1836. M. spathulata Spach 1836. M. prolifica (L.) Spach 1840. H. spathulatum (Spach) Steud. 1856. Brathys prolifica (L.) Payer	Shrubby St. Johnswort, Shrubby St. John's-wort Millepertuis prolifère	Native, C:3, Threatened, NYNHP: 2^[1] FACU Perennial, Shrub, Sun - part shade			NYFA-2 USDA-NN NPT Can ARS FNA Trop. BNA LBJ MBG Images, wsp
Hypericum adpressum W.P.C.Barton 1818. H. adpressum W.P.C.Barton 1821. H. fastigiatum Elliott 1840. H. adpressum var. fastigiatum 1853. Brathydium fastigiatum (Elliott) K.Koch 1853. Myriandra adpressa (W.P.C.Barton) K.Koch	Creeping St. John's-wort	Native, C:10, Threatened, NYNHP: 2^[2] OBL Perennial, Herb-forb			NYFA-2 USDA-N ARS FNA Trop. Images, wsp
Hypericum densiflorum Pursh 1813. H. densiflorum Pursh 1856. H. prolificum var. densiflorum	Bushy St. John's-wort	Native, C:10, Endangered, NYNHP: 1^[3] FACW Perennial, Shrub			NYFA-1 ARS FNA Trop. Images, wsp
Hypericum stragulum W.P.Adams & N.Robson 1803. Ascyrum multicaule Michx. ex Willd. 1936. A. hypericoides var. multicaule 1961. H. stragulum W.P.Adams & N.Robson 1980. H. hypericoides ssp. multicaule	Low St. John's-wort, St. Andrew's cross, Multi-stemmed St. John's-wort	Native, C:5, Endangered, NYNHP: 1^[4] FACU Perennial, Shrub, subshrub			NYFA-1 USDA-N0 NPT ARS FNA Images, wsp
Hypericum kalmianum L.	Kalm's St. John's-wort	Native, Likely extirpated			NYFA-Z USDA-NN ARS Images, wsp
Hypericum frondosum Michx. 1791. H. aureum W.Bartram (i) 1803. H. frondosum Michx. 1814. H. amoenum Pursh 1901. H. splendens Small	Golden St. John's-wort, Cedarglade St. Johnswort	Introduced, Not naturalized, Cultivated			NYFA-X USDA-N0 ARS ITIS FNA Trop. NSE BNA Images, wsp
Hypericum sect. Myriandra (excluded taxa)	St. John's-wort	N.Y. Status	Images	Distribution	NY NPT
Hypericum hypericoides (L.) Crantz 1753. Ascyrum hypericoides L. 1766. H. hypericoides (L.) Crantz	St. Andrew’s cross	N. America native, N.Y. excluded			NYFA-XCLD USDA-N0 FNA Trop. Images, wsp
Hypericum crux-andreae (L.) Cranz 1753. Ascyrum crux-andreae L. 1766. H. crux-andreae (L.) Cranz	St. Peter's-wort	N. America native, N.Y. excluded			NYFA-XCLD FNA Trop. Images, wsp
↑ New York Natural Heritage Program. 2016. Online Conservation Guide for Hypericum prolificum. Threatened, S2/G5. ↑ New York Natural Heritage Program. 2016. Online Conservation Guide for Hypericum adpressum. Threatened, S2/G3. ↑ New York Natural Heritage Program. 2016. Online Conservation Guide for Hypericum densiflorum. Endangered, S1/G5. ↑ New York Natural Heritage Program. 2016. Online Conservation Guide for Hypericum hypericoides ssp. multicaule. Endangered, S1/G5T4.

Hypericum sect. Roscyna[edit]

Section Roscyna contains the great or giant St. John's wort (Hypericum ascyron), which is native to Asia and northeastern North America. The rare native subspecies H. ascyron ssp. pyramidatum is present in New York, while the Asian subspecies do not appear to be present in the wild.

Malpighiales — Hypericaceae — Hypericeae — Hypericum sect. Roscyna
Hypericum sect. Roscyna	St. John's-wort	N.Y. Status	Images	Distribution	NY NPT
Hypericum ascyron L. ssp. pyramidatum (Aiton) N. Robson 1789. H. pyramidatum Aiton 1797. H. amplexicaule Lam. (i) 1802. H. ascyroides Willd. 1803. H. macrocarpum Michx. 1813. H. bartramianum Pursh 1836. Roscyna americana Spach 1951. H. ascyron var. americanum 2001. H. ascyron ssp. pyramidatum	Great St. John's-wort, American great St. Johnswort, Giant St. John's-wort Millepertuis à grandes fleurs, Millepertuis à grande fleur, Millepertuis faux-ascyrum, Millepertuis pyramidal	Native, C:8, Rare FAC Perennial, Herb-forb			NYFA-3 USDA-NN NPT Can ARS ITIS FNA FoC Trop. BNA Images, wsp Note: IW
Hypericum sect. Roscyna (excluded taxa)	St. John's-wort	N.Y. Status	Images	Distribution	NY NPT
Hypericum ascyron L. ssp. ascyron 1753. Hypericum ascyron L. 1856. Roscyna japonica Blume	Asian great St. Johnswort Millepertuis ascyron, Huang hai tang, Yuan ya zhong	Introduced from Asia, N.Y. excluded			NYFA-XCLD USDA-NN Can ARS FoC Trop. Images, wsp
Hypericum ascyron L. ssp. gebleri (Ledeb.) N. Robson 1831. H. gebleri Ledeb. 1831. H. ascyron var. macrosepalum 1836. Roscyna gebleri (Ledeb.) Spach 1859. H. ascyron var. brevistylum 2001. H. ascyron ssp. gebleri	North-Asian great St. Johnswort, Siberian great St. Johnswort, Short-style great St. Johnswort Duan zhu huang hai tang	Introduced from northern Asia, Impersistent			USDA-NN ARS FoC Trop. Images, wsp

Hypericum sect. Hypericum[edit]

Malpighiales — Hypericaceae — Hypericeae — Hypericum sect. Hypericum
Hypericum sect. Hypericum	St. John's-wort	N.Y. Status	Images	Distribution	NY NPT
Hypericum punctatum Lam. H. subpetiolatum	Spotted St. Johnswort, Spotted St. John's-wort	Native, C:4, Secure FAC Perennial, Herb-forb			NYFA-5 USDA-NN NPT ARS Images, wsp
Hypericum perforatum L. ssp. perforatum 1753. Hypericum perforatum L. 1763. H. officinarum (L.) Crantz (i) 1778. H. vulgare (L.) Lam. (i) 1789. H. officinale (L.) L.Gaterau (i) 1833. H. marylandicum Biroli ex Colla 1877. H. perforatum var. confertiflorum 1907. H. perforatum var. microphyllum 1941. H. nachitschevanicum Grossh.	Common St. John's-wort, Perforate St. John's-wort, Klamathweed, Goatweed, Eola-weed, Tipton's weed, Rosin-rose Millepertuis commun, Millepertuis perforé	Introduced from Eurasia, northern Africa, Somewhat invasive, NYIS: 47%^[1], IO			NYFA-X USDA-XX NPT Can ARS FoC Trop. NSE BNA IPN Images, wsp
↑ New York non-native plant invasiveness assessment – Hypericum perforatum: Low (47).

Hypericum sect. Oligostema[edit]

Hypericum humifusum
trailing St. John's-wort

Malpighiales — Hypericaceae — Hypericeae — Hypericum sect. Oligostema
Hypericum sect. Oligostema	St. John's-wort	N.Y. Status	Images	Distribution	NY NPT
Hypericum humifusum L. 1753. H. humifusum L.	Trailing St. John's-wort	Introduced, Not naturalized, Impersistent, Queens County 1879			NYFA-X USDA-X0 ARS ITIS Trop. BNA Images, wsp

Family Podostemaceae[edit]

The Podostemaceae (riverweed family) …

Subfamily Podostemoideae[edit]

Genus Podostemum[edit]

Malpighiales — Podostemaceae — Podostemoideae — Podostemum
Podostemum	River weed	N.Y. Status	Images	Distribution	NY NPT
Podostemum ceratophyllum Michx. Podostemum abrotanoides	Riverweed, Threadfoot, Hornleaf riverweed, River-moss	Native, C:8, Threatened OBL Perennial, Herb-forb			NYFA-2 USDA-NN ITIS BNA Images, wsp

Family Elatinaceae[edit]

The Elatinaceae is a small family with probably fewer than 50 species and only two genera worldwide. Only one genus (Elatine) has species that are native or naturalized in New York.

Genus Elatine[edit]

Malpighiales — Elatinaceae — Elatine
Elatine	Water wort	N.Y. Status	Images	Distribution	NY NPT
Elatine minima (Nutt.) Fisch. & C.A.Mey.	Small water-wort	Native, Likely secure			NYFA-4 USDA-NN NPT Images, wsp
Elatine americana (Pursh) Arn.	American water-wort	Native, Endangered			NYFA-1 USDA-N0 NPT Images, wsp
Elatine triandra Schkuhr	Threestamen waterwort, Three-stamened waterwort	Introduced			NYFA-X USDA-NN NPT Images, wsp

← Oxalidales	Flora of New York — Malpighiales (1) Hypericaceae, Podostemaceae, Elatinaceae				→ Malpighiales (2) Violaceae
	Table of contents	Genus index	Protected species index	Invasive species index

[1] Clusiaceae Troy Weldy & David Werier (2013) New York Flora Atlas. New York Flora Association, Albany, New York.

[2] Norman K.B. Robson (2016) Flora of North America, Volume 6, 24-Apr-2016

[3] New York Natural Heritage Program. 2016. Online Conservation Guide for Hypericum denticulatum. Endangered, S1/G5.

[4] Norman K. B. Robson. Hypericum sect. Myriandra (Spach) R. Keller Flora of North America 6:7 Hypericaceae

[5] New York Natural Heritage Program. 2016. Online Conservation Guide for Hypericum prolificum. Threatened, S2/G5.

[6] New York Natural Heritage Program. 2016. Online Conservation Guide for Hypericum adpressum. Threatened, S2/G3.

[7] New York Natural Heritage Program. 2016. Online Conservation Guide for Hypericum densiflorum. Endangered, S1/G5.

[8] New York Natural Heritage Program. 2016. Online Conservation Guide for Hypericum hypericoides ssp. multicaule. Endangered, S1/G5T4.

[9] New York non-native plant invasiveness assessment – Hypericum perforatum: Low (47).

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