New Combinations in Phedimus (Crassulaceae)

3 Pages·2000·1.9 MB·English

by  Hideaki Ohba

New Combinations in Phedimus (Crassulaceae)
Hideaki Ohba
University Museum, University of Tokyo, Hongo 7-3-1, Tokyo 113-0033, Japan
Bruce M. Bartholomew
Botany Department, California Academy of Sciences, Golden Gate Park, San Francisco,
California 94118-4599, U.S.A.
Nicholas J. Turland
Missouri Botanical Garden, P.O. Box 299, St. Louis, Missouri 63166-0299, U.S.A.
Fu Kunjun (Fu Kun-tsun)
Herbarium, North-western Institute of Botany, Yangling, Xianyang, Shaanxi 712100,
People’s Republic of China
Abstract. During the preparation of the account (1995) as well as Ham and’t Hart (1998) demon¬
of the Crassulaceae for the Flora of China, Volume strated that S. subg. Aizoon and S. subg. Spathulata
8, it was decided that Phedimus Rafinesque should are paraphyletic with respect to S. subg. Sedum.
be separated from Sedum L. It is therefore neces¬ Though the species of S. subg. Spathulata differ
sary to publish new combinations in Phedimus for from those of S. subg. Aizoon by their creeping ster¬
three varieties and one species previously recog¬ ile stems, purple or white petals, and nearly smooth
nized in Sedum: P. aizoon (L.) ’t Hart var. latifolius testae (Ohba, 1978), these differences are insuffi¬
(Maximowicz) H. Ohba, K. T. Fu & B. M. Barthol¬ cient to justify separation at generic rank, and so
omew, comb, nov., P. aizoon var. scabrus (Maximow¬ ’t Hart’s treatment is followed here. Except for
icz) H. Ohba, K. T. Fu & B. M. Bartholomew, comb, Gontcharova (1999), Aizopsis has never been used
nov., P. aizoon var. yamatutae (Kitagawa) H. Ohba, in Asian regional floras. Ohba has adopted Phedi¬
K. T. Fu & B. M. Bartholomew, comb, nov., and P mus in the new English-language Flora of Japan
hsinganicus (Y. C. Chu ex T. N. Liou) H. Ohba, K. (Ohba, in press) and will do likewise in the forth¬
T. Fu & B. M. Bartholomew, comb. nov. One sub¬ coming account of the Crassulaceae for the Flora
generic name, Phedimus subg. Aizoon (L. K. A. of China, Volume 8 (Fu & Ohba, in press). Most
Koch ex Schonland) H. Ohba & Turland, is vali¬ combinations in Phedimus were published by ’t
dated; it was first proposed by ’t Hart hut with an Hart (1995), but the following additional new com¬
erroneous (and uncorrectable) basionym citation. binations are needed for the Flora of China.
The name Sedum aizoon L. var. scabrum Maximow¬ Sedum, Phedimus, P. subg. Phedimus, and P.
icz is lectotypified. subg. Aizoon are distinguished as follows:
The most widely accepted infrageneric classifi¬ la. Leaves terete or semiterete, margin always en¬
cation of Sedum L. was first outlined by Ohba tire; testa reticulate or papillate-reticulate . . Sedum
(1978). Until then, most species of the Sedoideae lb. Leaves flattened, margin serrate or crenate; testa
longitudinally costate or subsmooth .... Phedimus
were classified in Sedum. Ohba (1978) classified S.
2a. Petals purple or white; creeping sterile stem
aizoon L. and allied species in S. subg. Aizoon (L. present; testa subsmooth .
K. A. Koch ex Schonland) H. Ohba. In the most .Phedimus subg. Phedimus
recent commentaries on the Asian Sedoideae, Ohba 2b. Petals yellow; creeping sterile stem absent;
(1995) separated S. subg. Aizoon from S. subg. Spa- testa longitudinally costate.
.Phedimus subg. Aizoon
thulata (Borissova) H. Ohba, treating the former as
a distinct genus under the name Aizopsis Grulich,
while ’t Hart (1995) included S. subg. Aizoon and Phedimus Rafinesque, Amer. Monthly Mag. &
S. subg. Spathulata in Phedimus Rafinesque. Ham Crit. Rev. 1: 438. 1817.
No von 10: 400-402. 2000.
Volume 10, Number 4 Ohba et al. 401
2000 Phedimus (Crassulaceae)
Phedimus subg. Phedimus. Asterosedum Grulich, Phedimus aizoon var. latifolius (Maximowicz) H.
Preslia 56: 38. 1984. TYPE (designated by’t Ohba, K. T. Fu & B. M. Bartholomew, comb,
Hart, 1991: 52): Phedimus stellatus (L.) Raf- nov. Basionym: Sedum aizoon L. var. latifolium
inesque (Sedum stellatum L.; Asterosedum stel- Maximowicz, Mem. Acad. Imp. Sci. St.-Peters-
latum (L.) Grulich). bourg Divers Savans 9 [Prim. FI. Amur.]: 115.
1859. TYPE: Russia. Amur River region: “in
Spathulata (Borissova) A. Ixive & D. I me. 'l'axon 34: 163.
1985. Sedum sect. Sedum subsect. Spathulata Boris¬ der Nahe der Bureja-Miindung,” 23 Aug 1856,
sova, Novosti Sist. Vyssh. Rast. 6: 117. 1970. Sedum Maximowicz s.n. (holotype, LE).
subg. Spathulata (Borissova) H. Ohba, J. Fac. Sci. Univ.
Tokyo, Sect. 3, Bot. 12: 178. 1978. Phedimus sect. Spa¬ Sedum austromanshuricum Nakai & Kitagawa, Rep. Ex-
thulata (Borissova) H. Ohba, in’t Hart & Eggli, Evol. ped. Manchoukuo Sect. 4, 1: 26. 1934 [as “austro-
& Syst. Crassulac. 156. 1995. TYPE: Spathulata spuria manshuricum”]. Sedum aizoon L. var. austroman¬
(Marschall von Bieberstein) A. Love & 1). Love (Sedum shuricum (Nakai & Kitagawa) Kitagawa, Lin. FI.
spurium Marschall von Bieberstein; Phedimus spurius Manshur. 247. 1939 [as “austro-manshurieum’T
(Marschall von Bieberstein) ’t Hart). TYPE: China. Hebei: “in monte Wu-ling-shan [Wu-
ling Shan],” 2 Sep 1933, T. Nakai. M. Honda & M.
When’t Hart (1991: 52) lectotypified Phedimus,
Kitagawa 1925 (holotype, TI).
that genus became homotypic with the later name
Asterosedum, which was typified by A. stellatum in
its protologue. Therefore, Asterosedum is now no- Phedimus aizoon var. seabrus (Maximowicz) H.
menelaturally superfluous, but it remains legitimate Ohba, K. T. Fu & B. M. Bartholomew, comb,
because the two names were not homotypic when nov. Basionym: Sedum aizoon L. var. scabrum
Asterosedum was first published (St. Louis Code, Maximowicz, Bull. Acad. Imp. Sci. Saint-Pe-
Art. 52 Note 2, Greuter et al., 2000). tersbourg 29: 144. 1883. TYPE: Mongolia/
China. “Mongolia australis: Siwan-tze” [? =
Phedimus subg. Aizoon (L. K. A. Koch ex Schon- Xiwanzi, now Chongli, NW of Beijing in Hebei
land) H. Ohba & Turland, comb. nov. Basion- Province], 1877, Artselaer s.n. (lectotype here
ym: Sedum sect. Aizoon L. K. A. Koch ex designated, LE).
Schonland, in Engler & Prantl, Nat. Pflanzen-
Ten syntypes were cited by Maximowicz in the
fam. 3(2a): 30. 1890. Sedum subg. Aizoon (L.
protologue: the first three from “Mongolia austral¬
K. A. Koch ex Schonland) H. Ohba, J. Fac.
is” and the others from China, although all were
Sci. Univ. Tokyo, Sect. 3, Bot. 12: 179. 1978.
probably collected in what is now Chinese terri¬
Aizopsis Grulich, Preslia 56: 35. 1984. TYPE:
tory. The first cited syntype, at LE, collected from
Phedimus aizoon (L.) ’t Hart (Sedum aizoon L.;
“Siwan-tze,” agrees with the taxon as currently
Aizopsis aizoon (L.) Grulich).
understood with its narrowly lanceolate or elliptic-
The combination Phedimus subg. Aizoon was first lanceolate leaves and is here designated as the
proposed by’t Hart (1995: 168). However, the bas- lectotype. The second cited syntype, also at LE,
ionym’t Hart cited (“Sedum sect. Aizoon [W. D. J.] collected from “Alaschan” by Przewalski in July
Koch, Syn. FI. Germ. [Helv.], 259. 1835”) does not 1873, better resembles Phedimus hybridus (L.) 't
exist. No S. sect. Aizoon was published by Koch in Hart in its broadly oblanceolate to narrowly ob-
his account of Sedum in Synopsis florae germanicae ovate leaves. The authors have not traced the other
et helveticae (Koch, 1835: 257-261). Therefore, ’t syntypes.
Hart's combination is invalid under Article 33.3 of
the St. Louis Code (Greuter et al., 2000). Unfortu¬
Phedimus aizoon var. yamatutae (Kitagawa)
nately, this incorrect basionym citation cannot be
treated as an error to be corrected under Article H. Ohba, K. T. Fu & B. M. Bartholomew,
33.4 (since it is an omission) or Article 33.6, thus comb. nov. Basionym: Sedum aizoon L. var.
necessitating the current nomenclatural action. yamatutae Kitagawa, Lin. FI. Manshur. 247.
1939 [as “Yamatutai”]. TYPE: China. Liaon¬
ing: “Prov. Feng-t'ien: In montibus Chien-
Phedimus aizoon (U.) 't Hart, in ’t Hart & Eggli,
shan [Qian Shan],” s.d., K. Yamatuta s.n.
Evol. & Syst. Crassulac. 168. 1995. Basionym:
(holotype, TI).
Sedum aizoon U., Sp. PL 1: 430. 1753. Aizopsis
aizoon (U.) Grulich, Preslia 56: 37. 1984. TYPE:
Sedum aizoon L. f. angustifolium Franchet, Noliv. Arch.
not designated; original material: Herb. Linn.
Mus. Hist. Nat., s6r. 2, 6: 9. 1883 [as "angustifolia"].
595.1 (LINN); [icon] “Anacampseros flore flavo” TYPE: China. Hebei: “environs de P6kin |Beijing],”
Amman, Stirp. Rar. Ruth. 96, t. 11. 1739. s.d., David 566 (holotype, P).
402 Novon
PhediinuH hsinganicus (Y. C. Chu ex S. H. Fu & sworth (editors). 2000. International Code of Botanical
Y. H. Huang) H. Ohba, K. T. Fu & B. M. Bar¬ Nomenclature (Saint Louis Code). Regnum Veg. 138.
Ham. R. C. 11. J. van. 1995. Phylogenetic relationships in
tholomew, comb. nov. Basionym: Sedum hsin-
the Crassulaceae inferred from chloroplast DNA varia¬
ganicum Y. C. Chu ex S. H. Fu & Y. H. tion. Pp. 16-29 in H. ’t Hart & U. Eggli (editors). Evo¬
Huang, in T. N. Liou, FI. PI. Herb. Chin. Bor.- lution and Systematics of the Crassulaceae. Backhuys
Orient. 4: 230, t. 108. 1980. TYPE: China. Nei Publishers, Leiden.
-& H. ’t Hart. 1998. Phylogenetic relationships in
Mongol: Hulun Buir Meng, Ergun Youqi, 750
the Crassulaceae inferred from chloroplast DNA restric¬
m, 8 Aug. 1951, Z. Wang 1834 (holotype, IFP
tion-site variation. Amer. J. Bot. 85: 123—134.
not seen). t Hart, H. 1991. Evolution and classification of the Eu¬
ropean Sedum species (Crassulaceae). FI. Medit. I: 31-
Acknowledgments. We thank Anthony R. Brach 61.
(MO c/o Harvard University Herbaria) for providing -. 1995. Infrafamilial and generic classification of
copies of literature, and Michael G. Gilbert (MO the Crassulaceae. Pp. 159-172 in H. 't Hart & U. Eggli
(editors). Evolution and Systematics of the Crassula¬
c/o BM) for help in preparing the manuscript.
ceae. Backhuys Publishers, l^iden.
Koch, W. D. J. 183.5-1838 [pp. [l]-352 publ. 1835). Syn¬
opsis florae germanicae et helveticae . . . Frankfurt am
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