RHYNCHOSPORA ZACUALTIPANENSIS AND ELEOCHARIS MOOREI, TWO NEW CYPERACEAE FROM MEXICO

8 Pages·2000·4.7 MB·English

by  Mark T Strong

m
RHYNCHOSPORA AND
ZACUALTIPANENSIS ELE0CHAR1S
TWO NEW
FROM
MOOREl, CYPERACEAE MEXICO
Mark
Strong M.S.Gonzalez-Elizondo
T.
Department of Botany, MRC/166 Herbaria IPN
CIIDIR, 1IDIR -
(
Snmhsonion
Institution Apdo. Postal 738
Durango, 34000
Dgo.,
USA
DC
Washington, 20560-0166 MEXICO
ARSTRAA1
:i:\'n !:nsp:)t(i/<h-uGitipancnvi \A alannq ,-;',; ; i<\\ a ,. ..'.. aa; h'< aiioraa a', ' Aonza.k /, from v,a:
.
i
n -nte similares.
it' <it')>
'I ii
nom
Rhynchospora Vahl on u worldwide.
,p les
n
1 t It is
i i i <
am
most diverse the Western Homi im mini tmnporate North America
in pi a
,
,
m
and theneotropics.EspejoSema ^t
L «int^ d 51 taxa (including
>
i i
f
Rma) from Mexico.
f tlu
i >
m n
vn\
Rhynchospora, a im h n mi ur pi a its that range from
. Ii
m
small diminutiveannuals than inmllt a,, pmennials up
less •> to 3
it it
I i . i
m
The com-
tall. leaves are piinitiiil h ^ J imp dorsiventrally
ii 1 ill
i i i
mamma.
pressed, and often have scabrous The inflorescence ranges from
single
a soli-
mam
Am
pound
panicles of spn k m| terminal and a seriesof -several
1
< i I I i
mil
remote conti'iuou an cymose
lateral, oi n oi partial
1 it
i i i I
|
panicles from the upper sheathing bracts. The morphology generally uniform
flora!
is
as follows: spik scales, with (1-)2-
i
md
tm
pt
I- III n j.
I t ii ,1 ll ii
I i I
mth
-2 scales are stamina: an
nl\ al
. > t
R-bram hod mtire;and achenes
1 vie ot
st is
.
tmnsvmmAy
often rugose rjgu ose,cach bcarima
or
,;t
:
riangular-lanceolate or discoid base of the
style.
Tig.H
STATKZacualtip^n
.
mm
r
|(ii H H
n i pi , iniitn I ] in I In! I i in i i fi I II u I It' IK
3869s KmaR'n isotvaao m am! M Rose barium amonyim, amae also amordeR
-A Am ia
i '
: I
Fig. 1 Rhynclwsporazacualtipanensis M. Strong (drawn from the type). A. Habit. B. Sections of leaf blades, proximal end
.
(left) to apex (right). C. Section of leaf at sheath orifice showing junction of sheath and blade. D. Detail of terminal
STRONG AND GONZALEZ, NEW SPECIES OF CYPERACEAE FROM ME
r Mi K 'res .flection notebook as pro
I i
.
made
However, recent searches by
ura
c
P.anta peienn's caesnOosa glalma rh'zonate
b
mm
mgon
obtuse
0.5-1.
alti, 7( 7) laii, vei set;
cm
ebmibitam laminae 10 30 lonqae, 0.5
r
-2,pedunculatae,
i
mm mm
cm
pedunculi ad 6 longi. Spicula< n 1.6 latae, anguste ovoideae
'
1 I I 1
vel ovoideo-lanceol 5-7, ovatae vel ovato-ellipticae,
m
m mm
iM m 5-p
mucronataevel bie ml 6-3.1 longae,
it
t > t i , i
mm mm mm
nn'in mi mlh r
2- 2.7(-3) latar li longis. Stylus
ti si
I i i l
Caespitose perei ?rect or ascending,
mmn
men
cm
20-60 5-1
bin
tail, 0. 7i id. n (o subterete, finely ribbed, often
I
channelled along on- ihous Leaves basal and lower cauline;sheaths
1
li t II ,i
i i
biown
eligulate,coarselyveinedabaxially,greentopal
ften proximally,
lish
m i Mi mI
h
glabrous, the innm b ,n Nimnbmtv hi finch n with concave ori-
I '
flattened) widely to narrowly v-shaped or crescentiform cross section, sometimes
in
ll nm
ihnm
subinvolute or tight n e ,e ly ribbed abaxially,
t
i i i
n en tioisely cabrous or
)tl in gl
i I t I i ] il i i
sometimes smooth composed and 1-
essentially proximally. Inflorescence of terminal
a
pun
cymose-fasciculate on
small, lateral partial slender pe-
2, lateral licles
il
I |
cm
duncles to 6 long, the lowest panicle remote from the two upper subcontiguous
ones; peduncles flattened, finely ribbed,antrm nut glabrous; bracts
nns,
it
i I > i ,
of the panicle branches setaceous,those subtending the peduncles, particularly the lower,
leaf-like; spikelet pedicels subtrigonous or plano-convex cross section, the margins
in
mm
often antrorselyscabrous;spikelets narrowly ovoid to ovoid-lanceoloid,3.5-4.2 long,
mm
5-7
.2-1 ,5(-1.6) wide, with scales, 3(-4)-flowered, maturing 2 achenes, the scales
1
spreading with maturing achenes;scales ovate to ovate-elliptic, indistinctly finely veined,
glabrous, margins entire, the midcosta prominent, pale brown to brown, prolonged be-
yond the acute to acuminate apex as mucro or short awn; scales (2.5-)2.6-3.1
a fertile
mm mm
2-3
long, 2-2.7(-3) wide; sterile scales at base of spikelet, smaller than fertile
mm
1.5-3 long,basifixed,thecae longitudinally dehiscent, apiculate atapex;style
parallel,
2-branched from below middle, 2/3 length of the branches glabrous, minutely
ca. style,
mm
scaly;achenes biconvex, obovate or obpyriform,achene body 1.8-2.1 long (exclud-
mm
brown
ing style base), .2-1 .4 wide, light to yellowish brown, finely transversely ru-
1
m i^nn
nun
gulose;style base n iimulit -I long pale brown,
ie of-
i i )
ten tur eh nit ely bar bed, reddish brown, often setose very
at at
mf
li
t , ' '
i
1
bodyv
ngthe oftheachene
equaling or exceed! length
)
the of the stylet
tip >ase.
j
i—Rhynchosporo known from
uattipancns only
za<
i
type collection made- in thessouthern extent of thi3 Sierra Madre Oriental mountain mi
approximately 20° 43' 00"!, N,98°39'00"W,ca.4.;SkmnorthofthetownofZacualtic
at
woods sphagnum
occurs pine and bogs about 00 m.
21
in at
It
'
Rhynchospoai Zu npora. keys to
mi
t il ' It
< i-
mo) monumental
Kukentha worldwide
section Stenophylluc Kukonlhal's treat-
R. in
(
1
ment of the subfamily Rhynchosporideae s. o ,'. included Gale's (1944)
ei
i i -
Rhynchospora and
section u Mil ib (in part), series
' i
I
Rariflorae Gale (in pait I. in st placed in R. sec-
' - i t
tion Glaucoe C. Clarke as circumscribed by Guaglianone (1979). The obovate or
B.
oopvnfomi, yollo bio n hen- npiiu inaip mat urfacc interrupted by
ith
i i
hi
m
conugath
transverse tin n h tu of species in that
i > i
i i
section. However, the narrow (0.S mm),stiff,ihickonod,otten v shaped or crescentiform
>
mm),
blades of R flattened
leaf 5
I
leaf blades typk al of p in u >' >> in In tinoui'hed
ti
li
. /
i
at once by this featuie fiom closely teiated species such as R. brownii ssp. americana
Ginglnnon< h mini
h; R.zacualtipanensis
ih nil
il
i ' a r i I i
m
him/
and II The
has longer bristles « /ens bristles of
I i i I
m
m one
R.zacualtipanensis typically equal or exceed body with severa
tin
it! ' tl
> -
some two
tirmo equaling ihe tip ot tin- stvlo uase, while in the iatlm species, there are
mm
Tb :>,<•> o
of the style base jMll t-1 length
in
,,,
t l> t -i , | ,
mm
while those of R rugosa range from 0.5-0.8
hi
it \
I
Mosoamermm
Thomas
length. treatment of Rhvnchospora by
(1992),
in In a R.
zacualtipanensis falls out at couplet 79[b] rugosa) in the pari of the key that treats
(/?.
ml
species of sectiot lotn unshed from the wide-
R.
m
ranging rugosa by iiph o kK oously discussed) and
R. tin tin 1,
it
>i . >i I I | i<
and smooth
further distinguishes long)
1
margins of the style lease (ollen anlroiselv enrow, proximally in R.rugosa).
s<
Eleocharis R. Brown is a widely distributed genus of ca. 200 species with 43 species
recorded by Espejo Serna & Lope,' t-emni (imp/) liom Mexico, the taxonomy of the ge-
it
nus difficult in pat hi u n n uters represented,
is iii
1 il
1 | I i
moorei
Eleocharis 2 XICO
Fig. .Hidalgo
Stail:
I
mooreiM. &
Ekocharis Strong Gonzj
Fig. 2. S.
summit
of leaf sheath with acute, mucronal
membranous
orifice (left). C. Inflorescence
(s
35 flonferae;squam
e,9
Achae
longis. Stylus Trifidus.
m
m
Perennial mi iMI k ca. (1.5-)2.5-3.5
i i ' - Ii i li i -
mm
onspe Minus Culms
thick, coveted by Lioir,,ek)i mt«\,M m;\Ul ike, da: k u.i ph d scalps.
u
i
i I |
m mm
sometime htm M tsu 14 un
caespitose, or n (0.2-)0.4-1
lall,
' il - • «
i I
mem-
wide,angularto terete, soih fattened vvlu^n tiiH:l,linclv mi lcaic,p,-ilc< jreen;sheaths
< I
branous, purple, 01 tta.mii irpl tn it iteen to translucent
i ii I | I t i
mm
mu upmimt
0.1-0.2 long ml, n-.m d upper sheaths with
th nl
1.
i i , 1
m
dm uhth uncate somewhat
the ventral orifice il to
r il 'i t
, I i I i
"mm mm
Hk
convex.Spikelets ovoid to ovoid ok. id lonp 2 wide, usually acute
•'.
. . - .
mm
to siihuummit 0.3 0.4 wide, 9 ic floweret:; scales polyst
at In
i|
i I <
mm mm
'o lout
J a i) in btt u nl
li
\ il |<
I i ' I
'Mm
m pmp Mil
stramineous midvonmh, id nil mini ind apo^
h
I.
I
mm mm
narrowly most wide); basal stabs shorter, 1-2.3 long, 1-
hyaline, (at 0. 0.2 -2
1 M1
mm
mmo
wide, ovatf in th >ame color and ap-
1.8
t i i I
pearance as the culm, the sides put pie, du Lot hv. no, .mo the margins and apex hya-
ill
I
mm 1mm
0.3-0.5 long, the
line,
'
M
Mil
mm
connective 14 b long
shottlv (in-
t it
| I i I | t I I t 1
mm
cluding the style-base), 0.75-1 wide, very obtusely triangular or biconvex with a
Ot
co lula in tin live h im ill uloim e
k
,| t i t I I I II t
|
oiown, shallowly mi mate, often or
us; |d line .irnl el lulu
is; iv it
c i
i i
III
m
ml nl ]u n ntu in i-
-i
i t i i i I
mm
doisallv sublluttened, 0.4 0.5 lono and wide base, sometimes slightly widei
.is
<il
hinhm
in ndqe
mcilesoltht In n o h atjunction with
1
it
i i i i
the body oftheachene; bristles 4 7,;edoish brown or vellovvish, rottcarsely barbed 1/2 to
On ngth T oxcot dino heme
2 ilin at
1 i I. •- n ' tl >
km
ckO horde con Hidalgo,2100
Pakaiypl.MEXICO.Verao;;u/Ssas oiarrotera sur luayat ocolla, del
al /
i
Ueod uooOom
883 (F,US 2879357) [distributed as uu, R
hi
i
,
]
r—Eleocharismoorei known from two
only
localitii
is it
t i i , i
m
ose proximity to h old, ilu nni,' imitotth Oriental moun-
c<]< u u ire
t i i f 1
lin range in the states of Hidalgo and Veracruz.These at approximately 20° 33' 00"N,
lie
00"W
3° 29' to 20° 43' 00"N, 98° 39' 00"W, the Hidalgo locality near Zacualtipan being
km estwib
Dproximately 25-30 noiib
- u locality neat luavacocotla. E.moore/
> . r I
sphagnum
ccurs in hi in to est at about 2100 m.
i d-
i r I ,
name m
The of the ne til ml Moore, 917-
II. i\ Jr. (1
\ [ i t i i [ t i
world renowned Arecace T md
980), a -in lot of the LH. Bailey
t
i | i i i i
New
ortorium at Cornell University, Ithaca, York from 960-1 980.
1
e| iio/mes of Svenson
t
' I i | i t- ,
195^i m
329, 1932, 1939, sub " " the subgenus How-
in t in Eleocharis.
•
( , .
,
oom
achene ml
with
b tmguishes from
/er, its -
I it> , I I t i it all
G m m
:her species in the oh u[ u m nimntly costulate, but
,i r<
, i
cross section the\ n tin a "</ are very obtusely triangular
i i i I ^
much
earing shot and imthei mlobate
a u n in ilut nor decurrent,
*
i i I
mi
id they lack bristles. Furthermor tl h rh + if 7 differ as well in
I
?ing lighter-colored,and the subrounded
e to
apex while those of £ moorei are ute to subacuminate. nioorei from £
a< differs
I.
im
in hi achenes
in buret with
r
II iii
< i i I | i i t i I t I i i i
m
md
different tubercle an From £
n coarser.
il
I i i i t i I i I i , , I
md
the Inlpuipl
differs in l fibrous scales
it ,i
t
i I
nM
m
im nle
the
spikelets
Hi
I t i i I i ' i
biconvex or veiv uselv liuricjuLu achene with cost u late angles;
ill
it
n
lowest spikelet scale being
ul
ii
tl
I i I i
obtusely tnoonous henes
scales,; trie a biconve.-. as with
: o
,11
! ' i ,
ACKNOWLEDGMENTS
ml
Je would like to thlankDan Nicolson (U ml Goetghebeur (GENT) reviewing
1 for
.)
I
iemanuscnpt;ancmonymousie m
od manu-
pro the
ie
1, tl it
t , | t 1 1 1 i i
:ript;BobDirig(Bh and
for collection biographical information on H.E.Moore; curators
I)
UC
B, G, M, MICH, an d for seamh'u n H E Moore specimens; and
t tl
II t
i i t I
all wi ]i| lie fo: the fine drawing of Rhynchospora zacualtipanensis.
1 ,1
,
REFERENCES
joSERNA,A.andA Monocotiledbneas Una
sp F ,R. Lopez Ferrari. 997. Las Mexicanas. Sinopsis
1
Florfstica. Lista de Referencia, Parte V. Cyperaceae. Consejo Nacional de Flora de
1 la
.
Mexico, Un Autbnoma Metiopo
A.C., iversidad Nacional para
t,n el
,1
1
1
ConocimientoylJsode
Biodiversidad. Mexico,
la D.F.
in
and
United
Uaii, hin in h States,
s. 1
it
I ) I I i I i
West Rhodora 46:255-278.
the
Indies.
Gon/an/ i/cMX), M.S. and I'M h 1 1°" A la mIm ilr >n .m e\ tothesiipraspecific
Ei it
i i 1 ^ . . 1 1
(Cyperaceae).Taxon 46:433-449.
taxa Eleocharis
in
19'" iM'Uih algunas
'' K \|k laceae)
Guagiianone, R It y
'*
' , • '
M
^2
I'M
,|n ,lm<- in
»1
._ i. it 1
M
1950 Voi in ind hhtl
Kukeniiial, G. n in h h bcji
ii it
i i > i I t I
t
75(1):90-126;(2):127-195.
nth
M
hodora 21-1
Svenson, H.K. 1929 »n >phi tu in j- hi 31:1 35.
it ' . ' I
Monographic Rhodora 34:193-203;
1932. studios in ihc cy tins icoci a
'
215-227.
Mm
na 1-1 43-77.
1939 Mill 41
hi in 3;
ir if li i t > i :
i
Amencan
1957. Eleocharis (Cyperaceae). North lora 18:509-540.
In:
I
W.W. 1992 n oamerica. Bnttonia
Thomas, n in u
,i il
' i t i i
, |
f