New Species and Notes in the Genus Dioclea s.l. (Fabaceae, subtribe Diocleinae)

2011·12.7 MB·English

by  Richard H Maxwell

New Species and Notes in the Genus Dioclea s.l.
(Fabaceae, subtribe Diocleinae)
Richard H. Maxwell
Indiana University Southeast Herbarium (JEF), 4201 Grant Line Road, New Albany, Indiana
47150, U.S.A. [email protected]
Abstract. Seven new species are described in represent some originally cited in my doctoral
dissertation (Maxwell, 1969).
R. H. Maxwell is described from Colombia and Lackey (1981), in his key. split Dioclea into two
the new series Virgatae R. H. Maxwell is created,
Bentham are raised to subgenera status, as the new more, two articles (Maxwell & Taylor. 2003: Queiroz
et al., 2003) show the existence of separate clades of
H. Maxwell and Dioclea subg. Platylobium (Benth.)
R. H. Maxwell. Within subgenus Platylobium, D. tional taxonomic units [OTUs]) were selected in
subgenera and the sections or series in Maxwell
species are described: D. apiculata R. H. Maxvell (1969). Maxwell and Taylor (2003) stated that the
Colombia, D. haughtii R. H. Maxwell from Colombia of species in Dioclea. Queiroz et al. (2003) found a
clade. with Dioclea species in the latter all within
lobi-um clade. I assert that the Dioclea species in the
Cymbosema-Dioclea clade (Queiroz et al., 2003) and
Bentham (1837) divided Dioclea Kunth (Fabaceae, Dioclea subg. Dioclea (Maxwell & Taylor, 2003)
Diocleinae) into section Eudioclea Benth. and section
Varela et al. (2004: 61), using spacer sequences
Bentham (1859) later added one new species, and
third section, section Platylobium Benth. To separate
his three sections, Bentham (1837, 1839) used
Taylor. Queiroz. and Maxwell have agreed to
groups within Dioclea s.l. DNA analysis of Dioclea
tions Dioclea subg. Platylobium (Benth.) R. H. lobi-um Sm. (Smith, 1793), and if Dioclea subg.
H. Maxwell are established. Amshoff (1939) named a
rejlexa Hook. f. (= D. hexandra (Roxb.) Mabb.),
Novon 21: 226-243. Published on 27 June 2011. doi: 10.3417/2002014
2011
228 Novon
2011
i ca. 7 X 2.5-3.5 i
2-2.5(-3)
(cid:9632). 8-14.5 X 4.5-7.5
230 Novon
Volume 21, Number 2 Maxwell 231
2011 Dioclea s.l. (Fabaceae, subtribe Diocleinae)
slightly cordate, adaxial lamina surface glabrate
3ca0n-e6s5c enctm .p utbeersectee,n cwe,i thf losrahtoer t,c a.a sc1e/2n ditnhge , lecnugrtlhy;, hpaesd itcheel ss m(caal.l es3t bmramc teloonlegs) . (cOa.t h3e Xr s3p mecmie)s a nind fsleorwieesr
rpaelr sbisrtaecntts; barcaucttee oolers oovvaatete, , ccaa. . 26.-51 0m mX . 6g-l8a brmamte,. southern Brazil, and Paraguay; D. fimbriata along
roseum Benth. into Dioclea [= Dioclea rosea (Benth.)
N. Zamora]. Queiroz et al. (2003: 317) indicated that
ca. 18 X 19 mm. claw ca. 6 mm; wings somewhat present study (0.17) and the relationship of Cymbo-
its taxonomic placement.” Placement of D. macran-
shallowly serrate, occasionally entire; stamens 10. tha next to C. roseum occurred in Maxwell and
glabrous, vexillary filament free at the base ca. 4 mm.
basal disc collar, ca. 8-ovulate, with whitish philous (Queiroz et ah. 2003: 305. 317)! Varela et al.
2-3 X 0.4 cm. eventually dehiscent, with stiff, erect.
X 8.5 X 2.5 mm. hilum ca. 14 mm. encircling nearly pOa. r4a-l0le.l7 tocm th. ew iuthp pae rd oswutnucruer,v cead. b4e.a4k-,6 a nXd 1tw.8o- 2to.2 f iXve
seeds (Maxwell. 1970. 1999; Kirkbride et al.. 2003).
cies is found in swampy forests, woods, wooded cliffs. Paratypes. COLOMBIA. Choco: Rio San Juan, J.
Cuatrecasas 21380 (F); Docordo, N mouth of Rio San Juan,
A. Gentry, E. Zardini, M. Monsalve & J. D. Caicedo 53845
Colombia, west of the Cordillera Occidental, at low A(JnEcFh, icMayOa),. JV. aClulea trdeecl asCaasu 1c5a2: 5D7e (pFt,, UdSe)l; dVeall lVe,a lalelo, nPga cRifiioc

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rarely 10 perfect uniform: pistils with the s round to slightly oblique: primary lateral veins in 10
usually proximally swollen, ovary disc dentate. F to 14 pairs; petioles ca. 8-14 cm, rachis ca. 1/4 the
indistinct, (1 to)2- to 9(to Ill-seeded; seeds various.
[1990a: 581]).
, 13-15 X ca. 10 n