AULONEMIA DAVID-SMITHII AND A. RUBRALIGULATA (POACEAE: BAMBUSOIDEAE: BAMBUSEAE: ARTHROSTYLIDIINAE): TWO NEW SMALL-FLOWERED SPECIES FROM PERU

2013·3.7 MB·English

by  Emmet J Judziewicz

AULONEMIA AND
DAVID-SMITHII RUBRALIGULATA
A.
(POACEAE: BAMBUSOIDEAE: BAMBUSEAE:
ARTHROSTYLIDIINAE):
TWO NEW
SMALL-FLOWERED FROM
PERU
SPECIES
Emmet
Judziewicz Geisthardt
Eric
J. J.
Stevens Point, Wisconsin 54481, U.S.A Stevens Point, Wisconsin 54481, U.SA.
Waas
Sepsenwol
M.
Christine Sol
Robert W. Freckmann Herbarium
Department of Biology and Museum ofNatural History
University ofWisconsin-Stevens Point Stevens Point, Wisconsin 54481, U.S.A.
Stevens Point, Wisconsin 54481, U.S.A.
[email protected]
ABSTRACT
RESUMEN
INTRODUCTION
The woody bamboo genus Aulonemia Goudot (Poaceae;
Venezuela Qudziewicz
Judziewicz al, 1999) in
its undescribed throughout the Andes (Clark 1995; et
diversity
&
&
Londono Clark 1997, 2007; Judziewicz
etal. 1991; Judziewicz Riina 2006), Colombia (Clark 1990; et al. et
&
&
Clark Judziewicz
and Oudziewicz 2011; et al. 2010,
al- 2013), Peru Oudziewicz TyrreU 2007) Bolivia
2011).
panicles of small spikelets and presence of leaf sheath
effuse
Several Peruvian species are notable for their
McClure (Huanuco, Cusco) has robust foliage leaf blades
niarginal hmbriae. Aulonemia 0- Presl)
parviflora
and
cm cm strongly tesseUate abaxially, extraordinarily long,
(21-)35-52 long and (3-)3.7-5.8 wide that are
mm hmbriae on
non-sphtting
and confluent, its foliage leaf
pale brownish 40-80 papery,
inner long,
ligules
much
San Martin) has
McClure (Loreto or smaller
On
sheath humilUma
margins. the other hand, A. (Pilg.)
Journal of the Botanical Research Institute of Texas 7(1)
8-17 cm long and 0.7-1 cm wide with sheath margins bearing regularly
non-tessellate foliage leaf blades
mm
35-50 and inconspicu-
(non-confluent) marginal fimbriae, terminal sheath fimbriae long,
spaced, discrete
may now be added two new
To group of “small-spikeleted” taxa with marginal leaf sheath fimbriae
this
&
and
(Amazonas, Cajamarca, Junin) has
Peruvian species (Table Aulonemia mbraligulata]udz. Geisthardt
1).
mm
cm cm
20-45 blades 15-25 long and 0.7-2.3 wide (that are not
elongate, reddish inner ligules long, foliage
&
Waas
has
and pectinate-fimbriate sheath margins, while A. david-smithii Judz. (Pasco) in-
at all tessellate),
cm cm
conspicuous inner ligules, foliage leaf blades 25-38 long and 27-3.6 wide, sheath margins with densely
mm
matted confluent fimbriae (these ultimately splitting) and terminal sheath fimbriae 10-15 long. Neither of
&
treatments of Peruvian grasses (Tovar 1993; Brako Zarruchi 1994).
KEY TO THE ANDEAN OF AULONEMIA
SPECIES
WITH MARGINAL FIMBRIAE AND EFFUSE PANICLES OF SMALL, SLENDER SPIKELETS
mm
Plant parts were measured using a ruler, and a portion of the abaxial leaf blade epidermis (from the central,
non-marginal
part of a well-developed blade) from one sample of both species was examined using
air-dried,
uncoated, untreated material in a Hitachi S3400 scanning
electron microscope; specimens were examined
from MO,
the following herbaria: F, K, NY, US, UWSP, and WIS.
P,
mm
culms
apparently
than
1; less 5 in diameter, glabrous. Midculm branching and
pattern
culm
leaves not
seen. Foliage leaves glabrous and smooth;
sheaths strongly
keeled, the midnerve prominent
near the summit, the margins
papery, chartaceous, and
prominently
cross-puckered on on
the lower leaves,
upper
the leaves the sheath margins
breaking up
into very
dense,
curling, orangish-brown, prominent
fimbri-
mm
3-5
ae long, each fimbria
attenuate into a mass
of interwi^^^^
3heath
summi mg
ac
auricles, but with mm
erect, brownish,
hispidulous
fimbriae 10-15
long; outer varying
ligule
nm mm
from an indumte
ca. 1 long to (one one an mm
side)
ovate, stramineous,
shiny 2-4
flange inner
long;
igule not evident, not large mm
if present; pseudopetioles 2-4
cm
long; blades 25-38 cm
long, 2.7-3.6 wide,
TT ^°"g-»cuminate, the base obtuse and
symmetrical,
moderately
strongly tes-
mm
acute,
paleas 1.8-3
long; flowers and not seen.
fruits
Leaf
I
Judziewiaetalj
Popinoe.—
Abundant;
globose
to slightly compound; 4-6 pm
in diameter.
Stomata.-Common;
stomata
alternating;
stomatal rows
4-5,
adjacent
to
costal
branched
papillae present each
at of the comers,
giving
jparatus
a plus sign
shape,
(+)
Interstomatal pm
cells.—ca. 20-30
long,
outline
indeter
papillae U
present, abundant, globose
compound,
,htly uniform
in
size.
Long
Cells.—Dimensions
difficult
t
133
30-50
Abundant, 4/10,000 mostly in intercostal zones, but present in costal zones; pi
Pricfeles.— ca.
pm
candy
30-50 wide, tapered to a sharp like a kiss.
tip,
long,
due dense
Cells.—Difficult to discern to papillae.
Short
pm
pm
Microhairs—2-celled, 55-60 pm long; basal cell 28-33 long, 7-10 wide; apical cell deflated, c
pm
30 long.
marginal fimbriae (densest in the
densely matted orangish
david-smUhii distinctive in its
Aulonetnia is
with
panicle
summit of the leaf sheath, effuse
Aulonemia queko Goudot -like flange at the
well as the
genus), as
known
The from just a single collec-
species
and somewhat abaxially tessellate leaf blades. is
small spikelets,
Oxa-
de San Matias in
summit north-south trending Cordillera
made on the ridgetop cloud forest of the
tion
DavidN.Smith(1945-1991),assiduous collector
named
an elevationof910m.ltis after
pampa, Peru,at
Pasco,
75n2’W,
but
Smith gave the longitude as
Garden.
Missouri Botanical
Peruvian and Bolivian flora for the
of the
summit
was probably made at the of the cordillera at
from his notes and label description, the collection
field
m
lowland 325 elevation.
75°12’ would place the collection in forest at
Google Earth);
75°06’W (according to
many and
epiphytic
included ferns
collections from that site
From Tropicos (accessed 24 April 2012), Smith’s
but
than6mtall.Brako&Zarucchi(1994)citedSmith2045a5A.humtIlima,
withno vegetation greater
shrubs,
summit
has shorter sheath
marginal fimbriae,
and confluent
known lacks
only from the type
that species
is
fimbriae, and has shorter, narrower leaf blades.
& 5.„jo«d.
4-5). PERU.
AdoMMnia rubraUgulat, GeislharA. sp. nov. (Figs. 7^^
Judz.
Culm
toSmlong, smooth.
up
ca.3nunmdiameter, reportedly
cute
woody bamboo;
Scrambling or climbing
branches
single^divergent
Midculm nodes bearing
appLntly Lferenriated from foUage leaves.
leaves not
abundant recurved
margins with
the
wUh strammeous to greenish, striate,
Foliage leaves sheaths glabrous,
when young confluent tnto a
mm 7-10 per cm, or
2-4 long spaced about
stramineous pectinate fimbriae
mm
tndurate
lot^,
and hmbriae; outer ligule ca. 1
summit lacking auricles
membrane;
chartaceous sheath
,nnerhgule20^5
1.5-3.5t^
long;
shiny flap
stramineous,
intoanovate «eous w^
stramineous, prolongedon one side
fadmg
when young
to
mm reddish
glabrous,
acute,
membranous, linear-lanceolate,
long,
a^;pseudopetioles2-3mmlong;blades.5-23cmlong0«^^^
rg\r:s:bt:s;s:c—
branches^
ovotdpamcle;
cm an open,
8-20
PedLle toScm terminal, tall,
up mflorescence
long
mmwi
e,
smooth,themainonesascendingata45°angle.Spikelets(12-)17-25mmlong,ca.
not seen,
with2.mmaturest«mas,rru.t
long; pistil
sumens3,theimmatureanthersca.lmm
apex;
doM
dammed
Te™
for.,,. 14 J„„ 1978, in (MO. US, UWSP). Pm,.
7828
I>t9z&m.rdl»
Coalk.
'^teMl,P„ve9i,,t500-19<»m,3-4jmi929.dens.lo««,Kiiltp&S»*259®O<7.US).
sim
and exhibited a
examined
Gentry 22898 (MO) was also
et
al.

new
Two species of Aulonemia from Peru
Judziewicz et al..
present, abundant, globose to
indeterminate; papillae
40-50 outline
Interstomatal cells.— Ca. iim long,
compound, uniform
slightly in size.
due dense papillae.
Long Cells.—Dimensions difficult to discern to
pm
pm 40-50 wide, tapered to a sharp tip, like a
35-45
Common, 3-4/10,000 pm^; long,
Prickles.—
ca.
due dense papillae.
Short Cells.—Difficult to discern to
pm
pm 45-50 long, 7-l(
ceU
75-80 basal
Microhairs.— long;
2-celled,
pm
30
long.
—
None
Macrohairs. seen.
r
•
northern and centra Peru at ei
endemic cloud forests in
Aulonemia to
rubraligulata
is
km
only 8 from
Ecaudor, since one collection is t
1500-2000 m; may be found in neighboring
eventually
it
ligule20-45mmlongis unique in the gen
inner
reddishfwhen fresh)
border The prominent
of that country.
&
humilhma, but that species
Smith 25959 as A.
and prompted Tovar (1993) cited Killip
the specific epithet.
summit
sheath hi
elongate leal
inconspicuous ligules,
known has
only from smaller of stature,
the type,
is
briae and with fewer
smaller spikelets florets.
ACKNOWLEDGMENTS
WethankUWSPsmdentEvaC.HathawayforthelinedrawingsandGerritDavidseCMCTfortheloanotspeci-
rmew.Gem.Dav.dse (MO) and
SmUh,andhU
helpful
on David
mens,
withobtaininginformation
assistance
Lynn
Clark (ISC) provided valuable reviews.
references
gymnosperr
and
plants
flowering
e
Brako, Catalogue of
L. and Zarucchi. 1994. tl
J.L.
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CuRK,
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N Garden, Bronx. Pp.
York Botanical
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et and Conservation of I
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Oambuseae), a spe-
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xinmfiaetPox^^-.
Cet” Aulonemia
LG,
CD. Tvmeil. 2007.
JuDzinncr, .no
1
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.
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JuoziEWKZ, EJ. 2006. Aulonemia new
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JuoziEwicz, EJ., E.L Shea, anoT.M. Wayda. 2010. Two new Bolivian species of Aulonemia (Poaceae: Bambusoideae: Bambu-
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