LECTOTYPIFICATION AND NOTES ON BACCHARIS RIOGRANDENSIS (ASTERACEAE: ASTEREAE)

2008·5.9 MB·English

by  Gustavo Heiden

AND ON
LECTOTYPIFICATION NOTES
BACCHARIS RIOGRANDENSIS
(ASTERACEAE: ASTEREAE)
Gustavo Heiden Angelo
Schneider
A.
CNPq-PROTAX em
Sc, Fellow M. Programa de Pos-Graduacdo
Sc,
ft Botanic
:ola National de Botdnica Tropical/lnstituto Universidade Federal do Rio Grande do Sui
PesquisasJardim Botanico do de
Rio Janeiro Bento Goncalves
Av.
Pacheco
Leao, 915, Jardim Botanico 9500, Porto Aiegre, RS 91 501-970, BRAZIL
de
Rio Janeiro, RJ 22460-030, BRAZIL [email protected]
com
gustavo.heiden@gmail.
&
Baccharis riograndensis Malag. Vidal, an endemic species from Rio Grande do Sul in southern
J.E. State,
was by monk name
Brazil, described Malagarriga (1949, under his Irmao Teodoro Luis) based on two
speci-
mens
collected by Vidal (syntypes) and two collections (paratypes) made by Malagarriga
himself. After
J.E.
the publication, accounts of this species appeared in the taxonomic literature several times (Malagarriga
1957, 1958, 1977; Barroso 1976; Diesel 1987; and Oliveira 2007), but no was made.
et lectotypification
al.
The
Museu
study of the syntypes housed Herbarium R, Nacional do Rio de along with
at Janeiro, general
from
collections various herbaria, confirmed taxon and allowed Along
this as distinct a choice of lectotype.
with
the
lectotypification, additional data are presented, including morphological
a description,
illustration,
IUCN
specimen
geographic map, and
citations, distributional (2001) status of conservation.
Baccharis
riograndensis
Malag.
&J.E. Vidal, Bol. Inform. Inst. Geobiol. 1:13. 1949. (Fig. 1). brasil. Rio
Type:
cm
25-65
Diagnostic description.— Subshrub, Stems mostly sometimes and decum-
short reptant
erect,
tall.
indument
bent, wings
3-alate, of clavate uniseriate hairs in of vegetative branches undulate, 0.5-5
tufts,
cm
cm
cm
long, 0.25-0.75 wide, branches winged, wings
narrower, 0.1-0.2
distinctly wide. Leaves
fertile
cm cm
reduced cm
0.1-0.2 0.1-0.25 5-25
to scales long, wide. Capitulescence a panicle of pseudospikes,
reduced
long, lateral spikes to solitary sessile capitula, not arranged in glomerules. Male capitulum: involucre
mm mm
campanulate 3.5-5.5 3.5-4 4-5 mediums
long, wide, phyllaries in series, the outer oblong, the
ovate, the inner short lanceolate, apex obtuse, margins narrowly hyaline, entire to short toothed
apically.
mm mm
Flowers 18-30 pappus 4-5 20-22 3-5
[40] long, uniseriate, bristles, corolla long, apically 5-lobed,
,
mm
mm,
mm, mm,
tube 2.8-3.3 throat 0.2-0.3 lobes 1.5-2 style 4-5 long, style apex not divided. Female
mm
mm
capitulum: clinanthium bearing 7-10 2-3
alveolate, biseriate hairs, involucre cylindrical, long,
4-7
wide, becoming more
phyllaries in series, the outers short ovate linear onwards the innermost
series,
mm
apex acute, margins narrowly hyaline, entire to short toothed apically. Flowers 30-40, pappus 7-8
Journal of the Botanical Research Institute of Texas 2(1)
capitulum, F.Male flower.
lie
mm
mi
5-7 with the ligule 5- toothed, style 7-7.5
long, ligulate
long, uniseriate, corolla
mm
Chromoso
and
12-20 few glabrous.
2.5-4 ribbed, surface papillose
long, cylindrical,
18 (Heiden 2006).
et
al.
name
Etymology—The the type
of the species refers to locality.
—
Vernacular names. carqueja, chirca.
—
may
between December and March; dispersion of cypselas last ui
Phenology. Fertile
Known Grande do
Geographic range.— only from the state of Rio Sul, Brazil (Fig. 2).
Rio Grande do the spec
Although an endemic with area in Sul,
restricted
Conservation.—
found in dry or rocky grasslands, mainly in the southern half of the state (granite sites in th
Heiden and
Schneider, Lectotypification of Baccharis riograndensis
jo. 2. Geographic range of Baccharis riograndensis (Asteraceae, Astereae) in Rio Grande do Sul State, southern Brazil.
and on
sparsely in the northern half (islands of discontinuous grassland areas plateau inserted in the
sites
may
Atlantic Forest biome). Increasing land use and planned forest projects disrupt the habitat of the spe-
Due
cies. to the anthropogenous pressure on the south Brazilian subtropical grasslands (compos) with the
and
increasing of displacement of native vegetation in substitution to large-scale Eucalyptus Pinus plantations,
IUCN
Near
the species regarded as Threatened (NT), concerning the (2001) status of conservation.
is
—
DC,
Comments. Baccharis riograndensis assigned subgen. Molina Heering and Caulopterae
to sect. to
is
the mainly due presence winged stems, clinanthium with glandular and pappus
latter to of hairs, bristles
and
of female flowers that are enlarged basally fused into a ring. Baccharis riograndensis sympatric in
is its
entire limited range to Baccharis crispa Spreng., which has a wider distributional area in southeastern South
America. Similar characteristics to the both species are the similar habitat, erect branches with undulate
wings, involucre of male capitula campanulate and uniseriate pappus in male and female flowers. Baccharis
riograndensis differs from B. crispa due to the fertile branches distinctly narrow-winged (vs. not distinctly
winged
fertile branches), lateral spikes reduced to solitary capitula lateral spikes fully developed or
(vs.
.
294 Journal of the Botanical Research Institute of Texas 2(1)
and
campanulate)
with reduced seeming glomerules), involucre of female capitula cylindrical
axis (vs.
mm mm
larger cypselas, 2.5-4 long smaller, 1-1.5 long). Another taxon, similar to B. riograndensis, is
(vs.
which some
from Argentina, shares
the alopatric Baccharis genistdloides subsp. lorentzii Joch. Mull., central
reduced
characteristics with riograndensis, such as the pseudospikes with the lateral spikes generally to
B.
on
and and but
the
one capitulum, cylindrical involucre of female capitula larger capitula cypselas, differs
branches
narrower
branching usually capitulescences wider),
basis of erectopatent erect), (vs. fertile
its (vs.
not distinctly winged distinctly narrow-winged fertile branches), fewer cypsela ribs (9-12 vs. generally
(vs.
and pappus
12-20)
multiseriate uniseriate).
(vs.
Mar Hagdund
Representative specimens: BRAZIL. Rio Grande do Sul: Arroio dos Ratos: Fazenda Faxinal, 10 1977, K. 10967 (ICN);
ritoAlegre,8Ma
9
R.Wasum
96 (ICN); Fazenda Mulita, )Apr:1001, 104 (HUCS).
i 5
277 Sao Jose dos Ai
(HAS).
(PACA); Quint
s.n.
^b^^i^m£c
G. Heide,
6,
rqneOsono,04Ma
mas (PACA).Tramand
6803 1994,
L.T.
r
J^^sS^GUAY.
Mo™
1821-1822 J,
.video: Sella*
,
)ch.Miill.ARGENlflNA. Bue>
gcnistelloides subsp lorei
»
HURG,
CNPO, HAS, HASU, HECT, HUCS, ICN, PACA, PEL, RB,
Authors acknowledge the herbaria R,
Nesom
SMDB, and Guy and Jochen Mailer the helpful comments; and Joao Ricardo Vieira Iganci
SP; for
L.
no
Compositae Hoffman. Estudo das especies ocorrentes
Barroso, G.M. 1976. - Subtribo Baccharidinae Brasil.
Rodriguesia 28(40):3-273.
1987. Contribuicao ao estudo taxonomico do genero Baccharis (grupo Trim era) no Rio Grande do
Diesel, L.
S.
38:91-126.
Pesquisas,
Sul. Bot.
Numero
cromossomico de Malag.
and Baccharis riograndensis
2006.
Bobrowski.
Heiden, G., J.R.V. Iganci, V. Stein, V.L.
&
-1
Vidal (Asteraceae). Pesquisas, Bot. 57:1 21 36.
J.E.
IUCN Red and
International Union for Conservation of Nature and Natural Resources (IUCN). 2001. List categories
Kingdom,
and Cambridge, United http://www.iucn.org
Version IUCN, Gland, Switzerland
criteria, 3.1.
Malagarriga Heras, R.R [IrmaoTeodoro 949. De y'Re-Botanica". Bol. Inform. Inst. Geobiol. La Salle 2:1 7.
Luis].
1
Index Baccharidinarum (Compositae). Contr. Geobiol. La
Malagarriga [IrmaoTeodoro 1952. Inst.
Heras,
Luis].
2:1-55.
Salle
o estudo da Sul-Riograndense quai o valor da "Flora
Malagarriga [IrmaoTeodoro 1957. Para
Heras, R.R )ra
Luis].
8:1-61
Brasiliensis"de Martius?. Contrib. Geobiol. La Salle
Inst.
Heiden and
Schneider, Lectotypification of Baccharis riograndensis 295
Novum
Malagarriga Heras, R.R [IrmaoTeodoro 1958. index baccharidinarum. Contr. Geobiol. La
Salle
Luis]. Inst.
9:1-35.
Mem.
Malagarriga Heras, R.R 1977. Nomenclator baccharidinarum omnium. Soc. Nat La Salle 37:129-224.
Ci.
Muller, 2006. Systematics of Baccharis (Compositae-Astereae) including an overview of the genus.
in Bolivia,
J.
Monogr.
76:1-341.
Syst. Bot.
and do genero
Oliveira, A.S., LP. Deble, A.A. Schneider, J.N.C. Marchiori. 2006. Checklist Baccharis para o Brasil
L.
(Asteraceae-Astereae). Balduinia 9:17-27.