|
The
Official Preliminary Checklist of |
There are a number of names that were removed from the main list for various reasons but that should be noted to provide complete information. These include other generic names which correctly belong to Nymphaea; names which, after review, accurately belong to other genera; those which have been noted as “Invalid” or “Illegitimate” by taxonomy experts; names which can be found in references but “do not exist” from a taxonomic point of view; and names which have been withdrawn by the author.
Castalia acutiloba (DC.) Hand.-Mazz. DO AP P
Symb. sin. VNP 7.334 PD 1931 SCN Correctly N. nouchali Burm. f.
Castalia alba Woodv.& Wood DO
AP P Bull.Torrey Bot.Club VNP
15.85 PD 1888 SCN Correctly N. alba L.
Castalia amazonum (Mart.& Zucc.) Britton &
P.Wilson DO AP
P Bot.Porto Rico VNP
5(2).305 PD 1924 SCN Correctly N. amazonum Mart.& Zucc.
Castalia ampla Salisb.
DO AP P
Ann. Bot. VNP 2.73 PD 1805 SCN Correctly N.ampla (Salisb.) DC.
Castalia biradiata (Sommerauer) Hayek DO
AP P Fl. Steiermark VNP
1.436 PD 1908 SCN Correctly N. candida C. Presl
Castalia blanda (G.Mey.)G.Lawson, nom. illeg. DO
AP P Proc.& Trans.Roy.Soc.Canada VNP
6.117 PD 1888 SCN Correctly N. glandulifera Rodscheid
Castalia blanda (G.Mey.)Standl. DO
AP P J.Wash.Acad.Sci VNP
15(20).458 PD 1925 SCN Correctly N. blanda G.Mey.
Castalia caerulea (Savigny) Tratt. DO
AP P Symb.Sin
VNP 7(2).333-334,f.7 PD
1931 SCN Correctly N. caerulea Savigny
Castalia candida (C. Presl) Schinz & Thell. DO AP P
Bull. Herb. Boissier sér. 2 VNP 7.573 PD 1907 SCN Correctly N. candida C. Presl
Castalia capensis (Thunb.) J. Schust. DO
AP P Bull. Herb. Boissier sér. 2 VNP
7.902 PD 1907 SCN Correctly N. capensis Thunb.
Castalia colchica Woronow ex Grossh. DO AP P
Fl. kavk. VNP 2.87 PD 1930 SCN Correctly N. candida C.Presl
Castalia crassifolia Hand.-Mazz.
DO AP P
Symb. sin. VNP 7.333 PD 1931 SCN Correctly N. tetragona Georgi
Castalia edulis Salisb.
DO AP P
Ann. Bot. (König & Sims) VNP 2.73 PD 1805 Jun? (Parad.lond.1.(1).sub t.14.1805
Oct.) SCN Correctly N. pubescens Willd.
Castalia elegans (Hook.)Greene
DO AP P
Bull.Torrey Bot.Club VNP 15.85 PD 1888 SCN Correctly N. elegans Hook.
Castalia flava (Leitn. ex A.Gray)Greene DO
AP P Bull.Torrey Bot.Club VNP
15.85 PD 1888 SCN Correctly N. mexicana Zucc.
Castalia gibertii Morong
DO AP P
Ann.New York Acad.Sci. VNP 7.48 PD 1893 SCN Correctly N.jamesoniana Planch.
Castalia gigantea (Hook.) Britten DO
AP P J. Bot.
VNP 26.9 PD
1888 SCN Correctly N. gigantea Hook.
Castalia gracilis (Zucc.) Rose
DO AP P
Contr.
Castalia jamesoniana (Planch.) Britton & P. Wilson DO
AP P Sci.Surv.Porto Rico & Virg.Is. VNP
5.305 PD 1924 SCN Correctly N. jamesoniana Planch.
Castalia leibergii Morong
DO AP P
Bot.Gaz. VNP 13.124
PD 1888 SCN
Correctly N. tetragona var. leibergii (Morong)B.Boivin
Castalia lekophylla Small DO AP
P Man.S.E.Fl. VNP 543 PD
1933 SCN Correctly N. odorata subsp. odorata
Castalia lotus (L.)Woodv.& Wood DO
AP P A. Rees
VNP Cycl.6.Castalia
no.3 PD 1819 SCN Correctly N. lotus L.
Castalia magifica Salisb.
DO AP P
Parad. lond. VNP 1(1).t 14
PD 1805 SCN
Correctly N. pubescens Willd.
Castalia mexicana J.M.Coult
DO AP P
Contr.U.S.Natl.Herb. VNP 2.12 PD 1891 SCN Correctly N. mexicana Zucc.
Castalia minor (Sims) Nyar.
DO AP
P Bull. Grad. Bot. Univ.
Cluj VNP 15.27 PD 1936, in obs. ("1935") SCN
Correctly odorata subsp. odorata
Castalia minoriflora Simonk.
DO AP P
Magyar Bot. Lapok VNP 7.131 PD 1908 SCN Correctly N. alba L.
Castalia mystica Salisb. nom. illeg. DO AP P
Ann. Bot. (König & Sims) VNP 2.73 PD 1805 Jun?(Parad.lond.1(1).sub t.14.1805
Oct) SCN Correctly N. lotus L.
Castalia odorata (Aiton)Woodv.& Wood DO
AP P Bull.Torrey Bot.Club VNP
15.85 PD 1888 SCN Correctly N. odorata subsp. odorata
Castalia odorata forma rosea Britton
DO AP P
Bull.Torrey Bot.Club VNP 17.123
PD 1890 SCN
Castalia odorata var. gigantea (Tricker) Fernald DO
AP P Rhodora
VNP 10(111).49 PD
1908 SCN Correctly odorata var. gigantea Tricker
Castalia odorata var. latifolia Harper
DO AP P
Bull.Torrey Bot.Club VNP 30.329
PD 1905 SCN
Correctly odorata subsp. odorata
Castalia odorata var. minor Cockerell
DO AP P
Muhlenbergia VNP 3.145 PD 1908 SCN
Castalia pringlei Rose DO AP
P Contr. U.S. Natl.
Herb. VNP 10.94 PD 1906 SCN Correctly N. odorata subsp. odorata
Castalia pubescens (Willd.)Woodv.& Wood DO
AP P Contr.U.S.Natl.Herb. VNP
10.94 PD 1906 SCN Correctly N. pubescens Willd.
Castalia pudica Salisb., nom.illeg. DO
AP P Ann. Bot. (König & Sims) VNP
2.72 PD 1805 Jun?(Parad.lond.1(1).sub t.14.1805
Oct) SCN Correctly N. odorata Aiton subsp. odorata
Castalia pulchella (DC.) Britton
DO AP P
Bull.New York Bot.Gard. VNP 4.138
PD 1906 SCN Correctly N. pulchella DC.
Castalia pygmaea Salisb.
DO AP
P Parad. lond. VNP
1(2).t.68 PD 1807 SCN Correctly N. pygmaea (Salis.)W.T.Aiton
Castalia reniformis (Walter)Nash
DO AP P
Bull.Torrey Bot.Club VNP 22(4).147 PD
1895 SCN Correctly N. odorata subsp. odorata
Castalia rubrodisca Green ex Durand & Durand DO
AP P Index Kew.Suppl. VNP
1 PD 1902 SCN
Castalia rudgeana (G.Meyer) Britt.& Wils. DO
AP P Sci.Surv.P.R.& Virg.Isl. VNP 5.305 PD 1924 SCN Correctly N. rudgeana G.Meyer
Castalia sacra Salisb.
DO AP
P Parad. lond. VNP
1(1).sub t.14 PD 1805 SCN Correctly N. pubescens Willd.
Castalia scutifolia Salisb.
DO AP P
Ann. Bot. (König & Sims) VNP 2.72 PD 1805 Jun?(Parad.lond.1(1).sub t.14.1805
Oct) SCN Correctly N. capensis Thunb.
Castalia semiaperta (C. Klinggr.) Fritsch DO
AP P Excursionsfl. Oesterrreich VNP
ed. 3, 138 PD 1922, in adnot SCN
Correctly N. candida C.Presl
Castalia spiralis Cockerell
DO AP P
Muhlenbergia VNP 3.145 PD 1908 SCN Correctly N. odorata Aiton subsp. odorata
Castalia stellaris Salisb.,nom.illeg. DO
AP P Ann. Bot. (König & Sims) VNP
2.72 PD 1805 Jun?(Parad.lond.1(1).sub t.14.1805
Oct) SCN Correctly N. nouchali Burm.f.
Castalia stellata (Willd.)Blume
DO AP P
Bijdr. VNP 1.49 PD 1825 SCN Correctly N. nouchali Burm.f.
Castalia tetragona (Georgi) G.Lawson DO
AP P Proc.& Trans.Roy.Soc.Canada VNP
6,Sect.4.112 PD 1888 SCN Correctly N. tetragona Georgi
Castalia tetragona var. leibergii (Morong) J.Schust. DO
AP P Bull.Herb.Boissier VNP
ser.2,7.856 PD 1907 SCN Correctly N. leibergii Morong
Castalia thermalis (DC.) Simonk.
DO AP P
Magyar Bot. Lapok VNP 7.131 PD 1908 SCN Correctly N. lotus L.
Castalia tuberosa (Paine) Greene DO
AP P Bull.Torrey Bot.Club VNP
15.84 PD 1888 SCN Correctly N. odorata Aiton subsp. tuberosa
(Paine) Wiersema & Hellq.
Castalia zanzibariensis Britton in Britton DO
AP P Fl.Bermuda
VNP 135 PD
1918 SCN Correctly N. capensis Thunb.
Leuconymphaea alba (L.) Kuntze
DO AP P
Revis. gen. VNP pl. 1:11.
PD 1891 SCN
Correctly N. alba L.
Leuconymphaea amazonum (Mart. & Zucc. Kuntz DO
AP P Revis. gen.
VNP pl. 1:11. PD
1891 SCN Correctly N. amazonum Mart. & Zucc.
Leuconymphaea berneriana (Planch.) Kuntze DO
AP P Revis. gen.
VNP pl. 1:11. PD
1891 SCN Correctly N. capensis Thunb.
Leuconymphaea blanda (G. Mey.) Kuntze, nom illeg. DO
AP P Revis. gen.
VNP pl. 1:11. PD
1891 SCN Correctly N. glandulifera Rodscheid
Leuconymphaea caerulea (Savigny) Kuntze DO
AP P Revis. gen.
VNP pl. 1:11. PD
1891 "coerulea" SCN Correctly N. caerulea Savigny
Leuconymphaea candida (C. Presl) Kuntze DO
AP P Revis. gen.
VNP pl. 1:11. PD
1891 SCN Correctly N. candida C.Presl
Leuconymphaea elegans (Hook.) Kuntze DO
AP P Revis. gen.
VNP pl. 1:11. PD
1891 SCN Correctly N. elegans Hook.
Leuconymphaea emirnensis (Planch.) Kuntze DO
AP P Revis. gen.
VNP pl. 1:11. PD
1891 SCN Correctly N. capensis Thunb.
Leuconymphaea flava (Leitn. ex A. Gray) Kuntze DO
AP P Revis. gen.
VNP pl. 1:11. PD
1891 SCN Correctly N. mexicana Zucc.
Leuconymphaea gardneriana (Planch.) Kuntze DO
AP P Revis. gen.
VNP pl. 1:11. PD
1891 SCN Correctly N. gardneriana Planch.
Leuconymphaea gibertii (Morong) Conard, nom. inval. DO
AP P Waterlilies
VNP 211 PD
1905, pro syn. (Publ. Carnegie Inst. Wash. 4) SCN
Correctly N. jamesoniana Planch.
Leuconymphaea gigantea (Hook.) Kuntze DO
AP P Revis. gen.
VNP pl. 1:11. PD
1891 SCN Correctly N. gigantea Hook.
Leuconymphaea goudotiana (Planch.) Kuntze DO
AP P Revis. gen.
VNP pl. 1:11. PD
1891 SCN Correctly N. amazonum subsp. amazonum
Leuconymphaea gracilis (Zucc.) Kuntze DO
AP P Revis. gen.
VNP pl. 1:11. PD
1891 SCN Correctly N. gracilis Zucc.
Leuconymphaea intermedia Kuntze
DO AP P
Revis. gen. VNP pl. 1:11.
PD 1891 SCN
Correctly N. spp.
Leuconymphaea jamesoniana (Planch.) Kuntze DO
AP P Revis. gen.
VNP pl. 1:11. PD
1891 SCN Correctly N. jamesoniana
Leuconymphaea lasiophylla (Mart. & Zucc.) Kuntze DO
AP P Revis. gen.
VNP pl. 1:11. PD
1891 SCN Correctly N. lasiophylla
Leuconymphaea lotus (L.) Kuntze
DO AP P
Revis. gen. VNP pl. 1:11.
PD 1891 SCN
Correctly N. lotus L.
Leuconymphaea lotus var. pubescens (L.) Kuntze (Willd.) DO
AP P Revis. gen.
VNP pl. 1:11. PD
1891 SCN Correctly N. pubescens Willd.
Leuconymphaea mexicana (Zucc.) Kuntze DO
AP P Revis. gen.
VNP pl. 1:11. PD
1891 SCN Correctly N. mexicana Zucc.
Leuconymphaea odorata (Aiton) Kuntze DO
AP P Revis. gen.
VNP pl. 1:11. PD 1891 SCN
Correctly N. odorata subsp. odorata
Leuconymphaea oxypetala (Planch.) Kuntze DO AP
P Revis. gen. VNP
pl. 1:11. PD 1891 SCN Correctly N. oxypetala Planch.
Leuconymphaea parkeriana (Lehm.) Kuntze DO
AP P Revis. gen.
VNP pl. 1:11. PD
1891 SCN Correctly N. odorata subsp. odorata
Leuconymphaea reniformis (Walter) Kuntze DO
AP P Revis. gen.
VNP pl. 1:11. PD
1891 SCN Correctly N. odorata subsp. odorata
Leuconymphaea rubra (Roxb. ex Andrews) Kuntze DO
AP P Revis. gen.
VNP pl. 1:12. PD
1891 SCN Correctly N. pubescens Willd.
Leuconymphaea stellata (Willd.) Kuntze DO
AP P Revis. gen.
VNP pl. 1:12. PD
1891 SCN Correctly N. nouchali Burm. f.
Leuconymphaea tetragona (Georgi) Kuntze DO
AP P Revis. gen.
VNP pl. 1:12. PD
1891 SCN Correctly N. tetragona Georgi
Leuconymphaea tuberosa (Paine) Kuntze DO
AP P Revis. gen.
VNP pl. 1:12. PD
1891 SCN Correctly N. odorata subsp. tuberosa
Leuconymphaea tussilagifolia (Lehm.) Kuntze DO
AP P Revis. gen.
VNP pl. 1:12. PD
1891 SCN Correctly N. gracilis Zucc.
Leuconymphaea undulata (Lehm.) Kuntze DO
AP P Revis. gen.
VNP pl. 1:12. PD
1891 SCN Correctly N. gracilis Zucc.
Leuconymphaea zanzibariensis (Casp.) Kuntze DO
AP P Revis. gen.
VNP pl. 1:12. PD
1891 "sansebariensis" SCN Correctly N. capensis Thunb.
Nymphaea advena Aiton DO AP
Aiton P Hort.Kew.ed.1
VNP 2.226 PD
1790 SCN Correctly Nuphar advena subsp. advena
Nymphaea advena subsp. erythraea G.S.Mill.& Standl. DO
AP P Contr.U.S.Natl.Herb. VNP
16(3).91,f. 16d PD 1912 SCN Correctly Nuphar advena subsp. advena
Nymphaea advena subsp. macrophylla (Small) G.S.Mill,&Standl. DO
AP P Contr.U.S.Natl.Herb. VNP
16(3).91,f. 16d PD 1912 SCN Correctly Nuphar advena subsp. advena
Nymphaea advena var. variegata (Engelm.)Fernald DO
AP P Rhodora
VNP 10(111).49 PD
1908 SCN Correctly Nuphar variegata
Nymphaea aesopii Orphanides
DO 1888 AP
Conard P The Waterlilies VNP
175 PD 1905 SCN Not validly published
Nymphaea affine DO
AP Hayek P
Fl. Steiermark VNP i.437 PD .(1908)
SCN Correctly Nuphar x spenneriana
Gaudin
Nymphaea alba DO
AP Nutt P
Gen.Am.ii. VNP 13 PD SCN
Misapplication of earlier name
Nymphaea alba DO
AP Patrin, ex Bunge P
in Ledeb.Fl.Alt. ii. VNP 272 PD SCN
Misapplication of earlier name
Nymphaea alba DO AP
Turcz. P in Bull.Soc.Nat.Mosc. VNP
xv.(1842) 93 PD SCN
Misapplication of earlier name
Nymphaea alba DO
AP Walt. P
Fl.Carol. VNP 155 PD SCN
Misapplication of earlier name
Nymphaea alba var. alba DO
AP Zarucchi et al P
Checklist of the Flora of China VNP PD
2000+ SCN Unnecessary autonym
Nymphaea alba canadensis Graham
DO 1826 AP
Conard P The Waterlilies VNP
180 PD 1905 SCN Unseen original publiaction
Nymphaea alba flore pleno odorata Gronovius DO
1762 AP Conard
P The Waterlilies VNP
180 PD 1905 SCN Phrase name, not L. bin. nom.
Nymphaea alba var. oligostigma Casp. nom.illeg. DO AP P
Oesterr.Bot.Z. VNP 13.188
PD 1863 SCN
Correctly candida C. Presl
Nymphaea amazonum hort. ex Casp.,nom.invalidum DO
AP C.F.P.Martius P
Fl.Bras. VNP 4(2).161
PD 1878,pro syn. SCN
Correctly rudgeana G.Mey.
Nymphaea
Nymphaea ampla Kotschy ex Casp. nom.invalidum DO
AP P Ann.Bot.Lugduno-.Batavum VNP
2.244 PD 1866, pro syn. SCN
Correctly caerulea Savigny
Nymphaea ampla var. rudgeana Planchon
DO AP Conard
P The Waterlilies VNP
205 PD 1905 SCN Not published, doesn't exist
Nymphaea arifolia Salisb., nom. illeg. DO
AP Salisb. P
in Kon.& Sims,Ann.Bot. VNP ii (1806) 71
PD SCN Correctly Nuphar advena subsp. advena
Nymphaea bashiniana DO
AP Steud. P
Nom. ed II VNP ii.-200
PD SCN Misspelling of basniniana
Nymphaea blanda DO
AP Hook. P
Bot.Mag. VNP sub t.4823
PD SCN amazonum IK - misapplication of Meyer's name
Nymphaea blanda DO
AP Planch. P
in Ann.Sc.Nat.Ser.III VNP xix. (1853) 47 PD
SCN rudgeana IK -
misapplication of Meyer's name
Nymphaea bombycina DO
AP G.S.Mill &
Standley P in Contrib. US. Nat.Herb. VNP
16.102 PD 1912 SCN Correctly Nuphar bombycinum
Nymphaea caerulea DO
AP André P
Bot.Rep. VNP t.197 PD SCN
Misapplication or a new name
Nymphaea capensis DO
AP Baill. P
Hist.pl.Madag.,Atlas VNP (1888) t.52
PD SCN Misapplication of earlier name
Nymphaea capensis var.
katangensis Hauman, nom.inval. DO
AP P Fl. Congo Belge VNP
2.164 PD 1951 SCN Correctly N. capensis Thunb.
Nymphaea chartacea DO
AP G.S. Mill &
Standley P in Contrib. US.Nat.Herb. VNP
16.94 PD 1912 SCN Correctly Nuphar advena subsp. advena
Nymphaea coteka DO
AP Roxb. ex Salisb. P
Parad. Lond. VNP i.sub t.14
PD SCN Never validly published
Nymphaea crenulata Raf. DO AP
P Med.Repos. VNP
ser.2,5.354 PD 1808, nom.nudum. SCN
Nymphaea sp.
Nymphaea x cultorum DO
AP Bergmans P
Vaste pl.rotsheesters VNP 358 PD 1924 SCN Circumscription of N. hybrida
Nymphaea x fletcheri DO
AP Lawson P
Trans.Roy.Soc.Canada VNP iv.(1888) 119
PD SCN Correctly Nuphar x rubrodiscum
Nymphaea fluviatilis DO
AP Harper P
Bull.Torr.Bot.Club VNP 33.234
PD 1906 SCN
Correctly Nuphar advena subsp. advena
Nymphaea foetida Lehm.,nom. invadidum DO
AP P Hamburger Garten- Blumenzeitung VNP
9.205 PD 1853 pro syn.
SCN Correctly amazonum
subsp. amazonum
Nymphaea fragrans Gardner ex Casp. nom.invalid DO
AP C.F.P Martius P
Fl. Bras. VNP
4(2).176 PD 1878, pro syn. SCN
Never validly published
Nymphaea fraterna DO
AP G.S. Mill. &
Standley P Contrib.US.Nat.Herb. VNP
16.82 PD 1912 SCN Correctly Nuphar variegata
Nymphaea gigantea f. casparyi DO
AP Masters P
Encyclopedia of the Water-Lily VNP 355 PD 1974 SCN Never validated as a forma
Nymphaea gigantea f. gigantea DO
AP Conard P
Mon.Gen.Nymp. VNP 130 PD 1905 SCN Unnecessary autonym
Nymphaea gigantea f. hookeri DO
AP Masters P
Encyclopedia of the Water-Lily VNP 355 PD 1974 SCN Never validated
Nymphaea gigantea var. alba DO
AP K.C.Landon P
Phytologia VNP 40(5).440
PD 1978 SCN
Not validly published
Nymphaea 'Guy Maurel' DO
AP P VNP PD
SCN Withdrawn by author
Nymphaea hastata DO
AP Michx. ex DC. P
Syst. ii. VNP 62 PD SCN
Correctly Nuphar sagittaefolium
Nymphaea hirta Kurz ex Teijsm.& Binn. DO
AP Michx. ex DC. P
Tijdschr.Ned.-Indie VNP 27.38 PD 1864 SCN Correctly Barclaya motleyi Hook. f.
Nymphaea hybrida DO
AP Peck P
in N.Y.State Mus.Bull. VNP 28.75 PD 1899 SCN Correctly Nuphar x rubrodisca
Nymphaea indica Commelin
DO 1696 AP
Conard P The Waterlilies VNP
23 PD 1905 SCN No botanical standing
Nymphaea integrifolia Salzm.ex. Lehm, nom.invalidum DO
AP P Hamburger GArten- Blumenzeitung VNP
9.205 PD 1853, pro syn. SCN
amazonum subsp. amazonum
Nymphaea x intermedia Weiker ex Rchb. DO
AP P Fl.saxon.
VNP 10,in obs. PD
1842 SCN Correctly Nuphar x spenneriana
Nymphaea japonica DO
AP G.Lawson P
Trans.Roy.Soc.Canada VNP 1888,vi.120 (1889) PD
SCN Correctly Nuphar
japonicum
Nymphaea japonica DO
AP (DC.) Kuntze P
Rev. Gen. VNP 12 PD 1891 SCN Correctly Nuphar japonicum
Nymphaea kalmiana DO
AP Sims P
Bot. Mag. VNP t. 1243
PD SCN Correctly Nuphar minimum
Nymphaea liberiensis DO
AP A.Cheval P
Fl.Viv.Afr.Occ.Franc. VNP 1.92 (1938), galice PD
SCN Not validly published
Nymphaea longifolia DO
AP Michx. P
Fl.bor.-am. VNP 1.312 PD 1803 SCN Correctly Nuphar sagittaefolium
Nymphaea lotus DO
AP Aubl.
Nymphaea lotus var. dentata DO
AP P VNP PD
SCN Does not exist, omit
Nymphaea lotus var. lotus Hook. & Thom. DO
1855 AP Conard
P The Waterlilies VNP
193 PD 1905 SCN Unnecessary autonym
Nymphaea ludoviciana DO
AP G.S.Mill. &
Standley P Contrib.US.Nat.Herb. VNP
16.92 PD 1912 SCN Correctly Nuphar ludovicianum
Nymphaea lutea L. DO 1753 AP P
Sp. pl. VNP 1-510 PD 1753 SCN Correctly Nuphar lutea
Nymphaea lutea DO
AP Thunb. P
Fl. Jap. VNP 223 PD SCN
Correctly Nuphar japonicum
Nymphaea lutea DO
AP Walt. P
Fl. Carol. VNP 154 PD SCN
Correctly Nuphar advena
Nymphaea lutea var. affinis (Harz) J. Schust. DO
AP Walt. P
Bull. Herb. Boissier sér. 2 VNP 8.69 PD 1907 SCN Correctly Nuphar x spenneriana Gaudin
Nymphaea lutea var. kalmiana Michx.
DO AP P
Fl. Bor.-Amer. VNP 1.311 PD 1803 SCN Correctly Nuphar microphylla (Pers.) Fernald
Nymphaea