Eurystyles crocodilus Szlach. (Orchidaceae), a new species from Brazil

2 Pages·1994·0.87 MB·English

by  D L Szlachetko

Mus.
Bull. natl Hist. nat„ Paris, 4*^ ser., 16, 1994,
section B, Adansonia, n° 103-104.
1
:
Eurystyles
crocodilus Szlach. (Orchidaceae)^
new
from
a
species Brazil
D. SZLACHETKO
L.
Summary
Description of Eurystyles new from
crocodilus, a species Brazil, related to E,
:
actinosophila (Barb. Rodr.) Schlecht. and E. ananassocomos (Rchb. Schlecht.
f.)
Resume
Description de Eurystyles crocodilus, une nouvelle espece du de
Bresil affine E.
:
actinosophila (Barb. Rodr.) Schlecht. et de E. ananassocomos (Rchb. Schlecht.
f.)
Garay.
Dariusz L. Szlachetko, Department of Plant Ecology and Nature Protection, University of Gdansk,
Al PL
Lesionow 80-441 Gdansk. Poland.
9.
The Wawra
genus Eurystyles embraces 15 species of neotropical, small, epiphytic orchids
of new
the subtribe Spiranthinae In the course of preparing a revision of the genus a
species
.
of Eurystyles has been discovered. described here for the time.
It is first
—
Eurystyles
crocodilus Szlach., nov, Fig.
sp.
1.
Planta E. actinosophilae similis. Ldbellum auriculis valde reductis supra faciem labelli vix exsertis.
Rostellum viscidiumque Ovarium perianthiumque glabra.
nulla.
Type & Hymenopolis Sao WU).
Wettstein Schieffner Sued-Brazilien, bei Paulo, 9.1901 (holo-,
s.n.,
:
Only known
material.
mm mm
Small epiphyte. Leaves subsessile or sessile, 8-20 long, 3-7 wide, forming a
4,
on
basal rosette, lanceolate to broad lanceolate, acute, minutely ciliate margins. Inflorescence
mm
16 long, dense, more or less ovate, set on very dehcate, densely glandular axis. Flowers
on Ovary
small, erect, tubular. Floral bracts ovate-lanceolate, acute, ciliate margins. untwisted,
membraneous,
glabrous. Perianth segments transparent, very dehcate, glabrous, with
thin,
mm mm
papillate epidermis the apices of sepals. Dorsal sepal 3.5 long, 0.7 wide,
at
mm mm
oblong-lanceolate, acute. Lateral sepals 5.6 long, 0.6 wide, linear with lanceolate
mm
nmi Lipe on broad claw
apices. Petals 3 long, 0.6 wide, lanceolate-spathulate, acute. set
and
adnate to the sepaline tube, indistinctly divided into the hypochile epichile. Basal part 2
mm
mm
mm
long by wide, ovate with knob-Uke, small, fleshy auricles apical part 1.3 long
1.3
;
mm mm
Gynostemium Column
by
wide, rhomboid-ovate, papillate, erect, 2.3 long. foot
1.1
adnate Anther oblong-lanceolate. Stigma narrow, horizontal, forming a
to the ovary.
No
transverse staminodes.
ridge.
104
4
4
E
E
f
—
apex
Fig. 1. Eurystyles crocodilus Szlach. a, flower and floral bract b, dorsal sepal and petal c, lateral sepal d,
: ; ; ;
of lateral sepal from the outside e, lip gynostemium, bottom view.
f,
; ;
Etymology
form
crocodilus
:
general outline, resembles a head of
this reptile.
and
Eurystyles crocodilus seems to be related to E. actinosophila (Barb. Rodr.) Schlecht.
and
E. ananassocomos (Rchb. f.) Schlecht., but it differs from the both in the lip form
gynostemium The Up between
structure. basal auricles of E. crocodilus are intermediate in size
E, actinosophila, in which they are large, and E. ananassocomos which has none. All of these
and
species are autogamous. Both E. actinosophila and E, ananassocomos have long, linear
membraneous
staminodes, while in E. crocodilus staminodes are completely reduced.