Flora of New York/Hypericaceae, Podostemaceae, Elatinaceae

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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
Clade Clade Order Family Subfamily Tribe Genus Common names #
rosids basal
rosids
Vitales Vitaceae Vitoideae Parthenocisseae Parthenocissus creeper, woodbine, ivy 3
Viteae Vitis grape 8
Ampelopsideae Ampelopsis peppervine 3
basal
fabids
Zygophyllales Zygophyllaceae Tribuloideae Tribulus puncturevine 1
Zygophylloideae Zygophyllum beancaper 1
fabids
COM
clade
Celastrales Parnassiaceae Parnassioideae Parnassia grass of parnassus 1
Celastraceae Celastroideae Celastrus bittersweet, staff vine 2
Euonymus burning bush, spindletree, wahoo 6
Oxalidales Oxalidaceae Oxalis woodsorrel 6
Malpighiales Hypericaceae Hypericeae Triadenum marsh St. John's wort 2
Hypericum St. John's wort 18
Podostemaceae Podostemoideae Podostemum river weed 1
Elatinaceae Elatine water wort 3
Violaceae Violoideae Violeae Hybanthus greenviolet 1
Viola violet 57
Salicaceae Salicoideae Populus cottonwood, aspen, poplar 11
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 | edit source]

The Hypericaceae (St. John's-wort family)

Tribe Hypericeae[edit | edit source]

Triadenum[edit | edit source]

Triadenum virginicum
Marsh St. Johnswort (Triadenum) species have also been placed in genus Hypericum, section Triadenioides.
Malpighiales — Hypericaceae — Hypericeae — Triadenum
TriadenumRaf. (1808) Marsh St. Johnswort N.Y. Status Images Distribution NY NPT
 (L.) Raf.

1759. Hypericum virginicum L.
1813. Elodea campanulata Pursh
1837. Triadenum virginicum (L.) Raf.
1838. Elodes virginica (L.) Nutt.
Marsh St. John's wort,
Virginia marsh St. John's wort
Native, CoC: 7,
Secure,
S5, G5

OBL

Perennial,
Herb-forb
Triadenum virginicum (14918080946) 2x3.jpg
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 (Spach) Gleason

1836. Elodes fraseri Spach
1836. Elodea fraseri Spach
1840. Hypericum fraseri (Spach) Steud.
1936. Hypericum virginicum var. fraseri (Spach) Fernald
1947. Triadenum fraseri (Spach) Gleason
1979. Triadenum virginicum ssp. fraseri (Spach) J.M.Gillett
Fraser's marsh St. Johnswort Native,
Secure
Triadenum fraseri (9656876181).jpg
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Hypericum[edit | edit source]

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.
Hypericum sect. Brathys[edit | edit source]
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
Hypericumsect. Brathys St. John's-wort N.Y. Status Images Distribution NY NPT
 L.

1753. Hypericum mutilum L.
Dwarf St. John's-wort Native, CoC: 6,
Secure
Hypericum mutilum NRCS-2.jpg
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(Britton) E.P.Bicknell

1891. H. canadense var. boreale Britton
1895. H. boreale (Britton) E.P.Bicknell
1895. H. mutilum var. boreale E.P.Bicknell provis.
1979. H. mutilum ssp. boreale J.M.Gillett
Northern St. Johnswort,
Northern St. John's-wort
Native, CoC: 7,
Secure
Hypericum boreale BB-1913.png
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(A.Gray) Britton

1867. H. canadense var. majus A.Gray
1894. H. majus (A.Gray) Britton
1908. H. mutilum var. longifolium R. Keller
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, CoC: 6,
Secure
Hypericum majus BB-1913.png
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 L.

Lesser Canadian St. John's wort,
Lesser Canadian St. Johnswort,
Canadian St. John's-wort,
Lesser St. Johns-wort
Native, CoC: 6,
Secure
Hypericum canadense NRCS-2.jpg
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 (L.)
Britton, Sterns & Poggenb.

Orangegrass,
Orange-grass St. John's-wort,
Pineweed
Native, CoC: 4,
Secure
Pineweed (Orange grass) (5750568407).jpg
Nymap.svg
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Walter

Coppery St. Johnswort,
Coppery St. John's-wort
Native, CoC: 10,
Endangered,
NYNHP: 1[1]
Hypericum denticulatum NRCS-2.jpg
Nymap.svg
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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
Hypericum boreale BB-1913.png
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Hypericumsect. Brathys (excluded taxa) St. John's-wort N.Y. Status Images Distribution NY NPT
Engelm. & A.Gray

Claspingleaf St. John's-wort,
Clasping-leaved
  St. John's-wort
N. America native,
N.Y. excluded
Hypericum gymnanthum BB-1913.png
Nymap.svg
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Hypericum sect. Myriandra[edit | edit source]
Hypericum ellipticum
The species of Hypericum sect. Myriandra are shrubs or subshrubs.[1]
Malpighiales — Hypericaceae — Hypericeae — Hypericum sect. Myriandra
Hypericumsect. Myriandrasubsect. Suturosperma St. John's-wort N.Y. Status Images Distribution NY NPT
 Hook.

1831. Hypericum ellipticum Hook.
1836. Brathydium canadense Spach
1840. H. brathydium Steudel
1908. H. canadense var. oviforme R Keller
Pale St. Johnswort,
Pale St. John's-wort,
Elliptic St. John's-wort,
Elliptic-leaved
  St. John's-wort
Millepertuis elliptique
Native, CoC: 6,
Secure,
S5, G5

OBL

Perennial,
Herb-forb
Hypericum ellipticum iNat-57495193.jpg
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 W.P.C.Barton

1818. Hypericum adpressum W.P.C.Barton
1821. Hypericum fastigiatum Elliott
1840. H. adpressum var. fastigiatum (Elliott) Torr. & A.Gray
1853. Brathydium fastigiatum
(Elliott) K.Koch
1853. Myriandra adpressa
(W.P.C.Barton) K.Koch
Creeping St. John's-wort Native, CoC: 10,
Threatened,
NYNHP: 2[1]

OBL

Perennial,
Herb-forb
Hypericum adpressum iNat-22662922 (2x3).jpg
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Hypericumsect. Myriandrasubsect. Centrosperma St. John's-wort N.Y. Status Images Distribution NY NPT
 L.

1767. Hypericum 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, CoC: 3,
Threatened,
S2, G5,
NYNHP: 2[2]

FACU

Perennial,
Shrub,
Sun - part shade
Hypericum prolificum Arkansas.jpg
Nymap.svg
Allegany, Broome, Cattaraugus, Chenango, Columbia, Nassau, Niagara, Oswego, Saratoga, Seneca, Suffolk, Warren, Westchester
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 Pursh

1813. Hypericum densiflorum Pursh
1856. H. prolificum var. densiflorum (Pursh) A.Gray
Bushy St. John's-wort Native, CoC: 10,
Endangered,
S1,
NYNHP: 1[3]

FACW

Perennial,
Shrub
Hypericum densiflorum BB-1913.png
Nymap.svg
Nassau, Queens, Suffolk
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 L.

1753. Hypericum kalmianum L.
1853. Norysca kalmiana (L.) K. Koch
Kalm's St. John's-wort Native, CoC: 10,
Likely extirpated,
SX, G4

FACW
Hypericum kalmianum iNat-102565220.jpg
Nymap.svg
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 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
Hypericum aureum 139-8498.jpg
Nymap.svg
Warren (1945)
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Hypericumsect. Myriandrasubsect. Ascyrum St. John's-wort N.Y. Status Images Distribution NY NPT
W.P.Adams & N.Robson

1803. Ascyrum multicaule Michx. ex Willd.
1936. A. hypericoides var. multicaule (Michx. ex Willd.) Fernald
1961. Hypericum stragulum
W.P.Adams & N.Robson
1980. H. hypericoides ssp. multicaule (Michx. ex Willd.) N.Robson
Low St. John's-wort,
St. Andrew's cross,
Multi-stemmed
  St. John's-wort
Native, CoC: 5,
Endangered,
NYNHP: 1[4]

FACU

Perennial,
Shrub, subshrub
Hypericum stragulum iNat-112528730.jpg
Nymap.svg
Nassau, Suffolk
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(L.) Crantz

1753. Ascyrum hypericoides L.
1766. H. hypericoides (L.) Crantz
    
St. Andrew’s cross N. America native,
N.Y. excluded
St. Andrews-cross (Hypericum hypericoides) (6757577093).jpg
Excluded nymap.svg
excluded
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(L.) Cranz

1753. Ascyrum crux-andreae L.
1766. Hypericum crux-andreae (L.) Cranz
St. Peter's-wort N. America native,
N.Y. excluded
Hypericum crux-andreae.jpg
Excluded nymap.svg
excluded
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Hypericum sect. Roscyna[edit | edit source]
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
Hypericumsect. Roscyna St. John's-wort N.Y. Status Images Distribution NY NPT
 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, CoC: 8,
Rare

FAC

Perennial,
Herb-forb
Hypericum ascyron 0807.JPG
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Note: IW
Hypericumsect. Roscyna (excluded taxa) St. John's-wort N.Y. Status Images Distribution NY NPT
 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
Hypericum ascyron.JPG
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 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
Hypericum ascyron (bud).JPG
Nymap.svg

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Hypericum sect. Hypericum[edit | edit source]
Hypericum punctatum

Malpighiales — Hypericaceae — Hypericeae — Hypericum sect. Hypericum
Hypericumsect. Hypericum St. John's-wort N.Y. Status Images Distribution NY NPT
 Lam.

    H. subpetiolatum
Spotted St. Johnswort,
Spotted St. John's-wort
Native, CoC: 4,
Secure

FAC

Perennial,
Herb-forb
Hypericum punctatum flower.jpg
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 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 Debeaux
1907. H. perforatum var. microphyllum H. Lév.
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
Hypericum perforatum WFNY-131A.jpg
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Hypericum sect. Oligostema[edit | edit source]
Hypericum humifusum
trailing St. John's-wort

Malpighiales — Hypericaceae — Hypericeae — Hypericum sect. Oligostema
Hypericumsect. Oligostema St. John's-wort N.Y. Status Images Distribution NY NPT
 L.

1753. H. humifusum L.
Trailing St. John's-wort Introduced,
Not naturalized,
Impersistent
Hypericum humifusum sl10 (9x16).jpg
Nymap.svg

NYFA: Queens (1879)
iNat: No observations
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Family Podostemaceae[edit | edit source]

The Podostemaceae (riverweed family) …

Subfamily Podostemoideae[edit | edit source]

Podostemum[edit | edit source]

Malpighiales — Podostemaceae — Podostemoideae — Podostemum
Podostemum River weed N.Y. Status Images Distribution NY NPT
Michx.

    Podostemum abrotanoides
Riverweed,
Threadfoot,
Hornleaf riverweed,
River-moss
Native, CoC: 8,
Threatened

OBL

Perennial,
Herb-forb
Podostemum ceratophyllum BB-1913.png
Podostemum ceratophyllum NY-dist-map.png
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Family Elatinaceae[edit | edit source]

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.

Elatine[edit | edit source]

Elatine americana
Genus Elatine (waterworts).
Malpighiales — Elatinaceae — Elatine
Elatine Water wort N.Y. Status Images Distribution NY NPT
(Nutt.) Fisch. & C.A.Mey.

Small water-wort Native,
Likely secure
Elatine minima iNat-32748463 (3x4).jpg
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 (Pursh) Arn.

American water-wort Native, CoC: 9,
Endangered,
S1, G4

OBL

Annual,
Herb-forb
Elatine americana iNat-89843363 (3x4).jpg
Nymap.svg

NYFA: 9 counties
iNat: no observations
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 Schkuhr

Eurasian waterwort
Threestamen waterwort
Three-stamened waterwort
Introduced,
Naturalized,
SNA

OBL

Annual,
Herb-forb
Elatine triandra flower.jpg
Nymap.svg

NYFA: 4 counties
iNat: no observations
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