New combinations under Hoya verticillata (Asclepoadaceae) and a bibliographical note on sperlingia

4 Pages·1996·0.44 MB·English

by  Veldkamp, J F

BLUMEA 41 (1996) 439-442
New combinationsunder Hoya verticillata
(Asclepoadaceae)
and a bibliographicalnote onsperlingia
J.F. Veldkamp& B.Hansen
Summary
Twonewvarietal combinations areproposedunderHoyaverticillata (Vahl)G.Don(Asclepiadaceae).
Thereasonforthe delayin thepublicationofSperlingiaVahl is outlined.
Hoya
Inaprevious articlewe(Veldkamp etal., 1995) havereducedHoyaparasitica (Roxb.)
Wall,ex Wight (Asclepiadaceae) toH. verticillata(Vahl) G.Don.Whilethiswas in
press apaperby Kiew (1995) appeared where a new variety ofH. parasitica was
described.ShealsomadeclearthatH.parasitica var. citrina(Ridl.) Rintzis indeeda
formofH.parasitica, andnot a distinctspecies, something wewere not sureof.
Roxburgh mentionedan Asclepiasparasitica Roxb.in 1814,whichwas validly de-
scribedin 1832,based on materialintheBotanicGardensofCalcutta. However, in
between(1819) Hornemannalsohadpublished anAsclepias parasitica Wallichprob-
ably basedon materialgrownintheBotanicGardenofCalcuttain 1815andsentby
Wallich in 1816andcertainly on a plant grown in 1818in Copenhagen (see also
Mabberley, 1984).There are threesheetsin Cand Mr. R. van Donkelaaridentified
them as belonging toA. parasitica sensu Roxb. Onesheetis stamped 'Hb. Horn.’
andannotated(by Hornemannhimself?)“Hoyaparasitica Wall.(Asclepiasparasitica
Roxb.) Herb, paras.” (with thealchemist's symbol for herb); note thatHornemann
published itas “caulefruticoso” and withthealchemist'ssymbol fora woodyplant
“Aestuar. Gangis” (IDC microfiche 14II,6-7). Becauseofthestampandtheanno-
tationsthismayberegarded asthelectotype.
The othertwo sheetsbear referencestoWallich, but itis not clearwhetherthey
were actually writtenby Wallich himself. The script is similar.On the back ofone
sheet thereis "HB. 1815,No. 787',presumably referring to theBotanic Garden in
Calcutta. The numberis not thatofWallich(1829-1847), where '787' isDidymo-
carpusreptans Jack, while'8159' is Hoyaparasitica Herb.Wight.
On the backoftheothersheet, annotated"IDCmicrofichephoto 14II, 4-5", IS
written“Asclepiasparasitica Roxb.”"Indiaorientalemisit Wallich 1816."
1) Rijksherbarium/Hortus Botanicus,P.O.Box9514, 2300 RALeiden. TheNetherlands.
2) Vuglevadsvej 8,2800Lynby,Denmark.
440 BLUMEA Vol. 41, No. 2, 1996
Actually thepublication, not theidentity ofHornemann'sname is sofarofimpor-
tance inthatitmadeRoxburgh's 1832combinationalaterhomonym.Wight (1834)
transferredRoxburgh's taxon to Hoya and, as ithad no legitimate epithet, was al-
lowedtouseany hepleased. He madethe(now) legitimate combinationHoyapara-
sitica [Roxb.] Wallich ex Wightandthis combinationis to beused ifthetaxon is
regarded as distinct. Thecitationof“[Roxb.]” here is intendedto indicatethatthe
basionym is illegitimate.Officiallythesquare-bracketed authorcanbecompletely de-
leted.
WhenH.parasitica Wightisregarded as asynonymofH. verticillata(Vahl) G.Don,
new combinationsarerequired forthevarietiesdistinguishedby Kiew.
1.Hoya verticillata (Vahl) G.Don var. citrina (Ridl.)Veldkamp, comb. nov.
Hoyaverticillata (Vahl)G.Donvar.citrina(Ridl.)Kloppenburg,Fraterna 2nd Quart. 1996 (1996)9,
comb, inval.—Hoyacitrina Ridl.,J.Str.Br.Roy. As.Soc. 86 (1922)300.—Hoyaparasitica
[Roxb.] Wall, ex Wightvar. citrina Rintz,Mai. Nat. J.30 (1978)514, f. 27.—Hoya acuta
A.W.Haworthvar.citrina Kent,Hoyan 11/1/2(1989)I.—Lectotype:Ridleys.n.,'BatuCaves'
(holo K).
Petioles 1-2cm long. Leafbladesovate, 10-18.5 by 6.5-8.5 cm, base cordate,
rigidly coriaceous, venationconspicuous, lowestpairoflateral veinsextending tothe
apex.
Distribution—Malay Peninsula:Pahang (fideRintz, 1978),Perak(Ulu Bubong,
Batu Kurau), Selangor (BatuCaves).
Habitat—Commononlimestone, andsometimesinriverinefringe forestatlow
altitudes.
Note—Because Kloppenburg (1996) citedHoya verticillataproperasoneofthe
synonyms, heoughttohaveusedtheautonym.Healso gaveno fulland directrefer-
enceto thebasionym. Hiscombinationis thereforeinvalid.
2. Hoyaverticillata (Vahl) G.Don var. hendersonii(Kiew) Veldkamp, comb. nov.
Hoya verticillata (Vahl)G.Don var. hendersonii (Kiew) Kloppenburg,Fraterna 2nd Quart. 1996
(1996)9, comb, inval. —Hoyaparasitica [Roxb.] Wall, exWight var. hendersonii Kiew,San-
dakania 6(1995)66,t. 1.—Type:SF23668(Henderson)(holoSING).
Petiolesc. 2 cm long.Leafbladesovate-oblong, 11.5-17by 5-6.5 cm,baseslight-
ly cordate,coriaceous, venationconspicuous, lowestpairoflateral veinsextending
totheapex.
Distribution—Malay Peninsula:Pahang, CameronHighlands,Fraser's Hill.
Habitat—Lowermontane forest, 1200-1260maltitude.
Note— BecauseKloppenburg (1996) citedHoya verticillataproper, heought to
haveusedtheautonym.He alsoreduced hisnew combinationinthenext paragraph
to asynonymofvar. citrina.His combinationis thereforeinvalid.
J.F..Veldkamp& B.Hansen: Notes on Hoya and Sperlingia 441
3. Hoya verticillata (Vahl) G.Don var. verticillata
Hoyaverticillata(Vahl)G.Don,Gen. Hist. 4(1837)128.—Sperlingiaverticillata Vahl,Skr.Natur-
hist.-Selsk. 6(1810)113.—Type: Flohrs.n. inHb. Vahl (holoC,labelled IDC neg. 72", 6-7).
Asclepiasparasitica Hornem.,Hort.Bot.Hafn., Suppl.(1819) 126.—Lectotype: Hb. Hornemann
s.n. (holoC,IDCmicrofiche photoTypeHerbarium 14II,6-7).
Asclepiasparasitica Roxb. [Hort.Beng. (1814)20, nom. inval.] Fl. Ind. ed.2, 2(1832)42, non
Hornem.(1819).—Hoyaparasitica Wall,exWight,Contr.Bot. India(1834)37.—Lectotype:
Hb. Roxburgh 1382(holoBM;K: Icon. Ined. 1382).
HoyaamoenaBakh. f.,Blumea6 (1950)380. —Type:Koorders 20341 (holoL;iso BO).
For furthersynonymyseeVeldkampet al.(1995).
Petioles0.5-1cm long. Leafbladesovate tolanceolate,6.5-13.5by 2.3-6cm,base
roundedtobroadly cuneate,succulently coriaceous, venationobscure, lowestpair of
lateral veinsextending abouthalfway toapex.
Distribution—India, Nepal, Andamans,toSVietnam;Malesia:Malay Peninsula,
Singapore, NE Sumatra(Sibolga), Sarawak,Brunei, Java (P. Peucang; Besuki, G.
Puger, as H.amoena), andperhaps elsewhere.
Habitat—Commoninbeach forests, especially onislands.
SPERLINGIA
Somemoreresearchby BH on thepublication dateofSperlingiaVahl(see Veldkamp
etal., 1995)has brought anintriguing piece ofhistory tolight.
Inthecaseofthepublication dateforSkr. Naturhist.-Selsk6(1810) wehave thefol-
lowing facts.
Vahldied late December 1804. His very good friend, N. Tpnder-Lund, also a
memberoftheNaturhistorieselkabetfinishedhisEnumeratiovol. 2,andSkr. Natur-
hist.-Selsk. 6, whereVahl hadseveral papers. However, Tpnder-Lund,whowas a
governmentservant taking care ofespecially custom problems, was sent onamis-
sion to Norway early 1809.He ship-wrecked and disappeared in January 1809and
was never found.Volume6 was ready fortheprinters in 1810and containedalong
prologue by the zoologist J. Rathke, afriendofboth Vahl andTpnder-Lund.The
prologue was an obituary ofTpnder-Lundand contained oneor twopassages not
very favourabletoE.Viborg, anotherprofessorofbotany and definitelyanenemyof
theVahlclub.Viborg, whohad influentialfriendsin thegovernment,haddoneany-
thing toharmVahloverthelast twentyyears.He nowdemandedRathke's prologue
tobe cut outbeforetheissuewas releasedtothe booksellers.Itis unbelievablethat
this discussionwentonforeight years,butit is afactthattheissuewas not released
until 1818withtheprotologue deleted.However, wethinkthat onecopy wasplaced
in the Copenhagen BotanicalLibrary already in 1810, because thatcopy contains
Rathke'sprologue infullandwas thussparedViborg's auto-da-fe.Itis theonlycopy
knownto containthefull prologue. Ifthisreasoning holds true,effectivepublication
tookplace in 1810,as thevolumewas availableto thepublic (Art. 29.1). Whether
thiswas before27March 1810,the datethat Hoya R.Br, was published, is as yet
unknown. — BH.
442 BLUMEA Vol. 41, No.2, 1996
Itis tobenotedthat allauthoritativeworks (Index Kewensis,IndexNominum Gen-
ericorum, InternationalCodeofBotanical Nomenclature, 1994), perhaps by mere
copying one another, haveaccepted 1810as thepublication dateofthenew genera
published by Vahl inthisissue:Dacryodes, Schumacheria, Thonningia are currently
accepted, whilePtyxostoma, Macaglia, and Westiaare nominarejicienda.
Collyris is generallyregarded as asynonymofDischidia R.Br., alsoof27March
1810andthusthenomenclaturalfateofDischidiais identicalwiththatofHoya.
Collyris was lectotypified with C. majorVahlby Panigrahi (1986). Thisspecies
is nowD. major(Vahl) Merr., formerly known as Dischidiarafflesiana Wall.
ACKNOWLEDGEMENTS
WeareverygratefultotheKeepers ofC fortheloan ofthe Hornemann material ofHoyaparasitica
WallichexHornem. andfor theidentification ofitby Mr.R.vanDonkelaar.
REFERENCES
Hornemann,J.W. 1819.Hortus regiusbotanicushafniensis,Suppl.: 126.Hafnia (Copenhagen)
Kiew,R. 1995.AnewBegonia(Begoniaceae), Hoya(Asclepiadaceae)andSonerila (Melastomata-
ceae)fromFraser's Hill,Peninsular Malaysia. Sandakania 6: 63-71.
Mabberley,D.J. 1984.Pallas's Buckthorn and two and a half centuries of neglectedbinomials
Taxon 33: 436.
Panigrahi,G. 1986.Nomenclature anddistribution ofDischidia rafflesiana (Asclepiadaceae).Bangla-
desh J.Bot. 15: 195.
Roxburgh,W. 1814. Hortusbengalensis:20.Serampore.
Roxburgh, W. 1832. Floraindica,ed.2, 2:42.Serampore.
Veldkamp, J.F., R.van Donkelaar & R.D. Kloppenburg. 1995.The identity ofSperlingiaVahl
(Asclepiadaceae).Blumea 40:425-428.
Wallich. 1829-1847. Anumerical list ofdried specimens...:no.787, 8159. London.
Wight,R. 1834. Contributions tothebotanyofIndia: 37.London.