Key-words:
Brazil, Minas Gerais, Atlantic Forest, Orchidaceae, Epidendrum,
E. josianae, E. warasii, E. zappii
Abstract
A species from the mountain ranges of Minas Gerais, Brazil, described
as Epidendrum josianae. This species has some features in
common with Epidendrum warasii Pabst and Epidendrum zappii
Pabst which are compared. Information on its ecology and geographic
occurrence is given.
The
very specific xerophyte flora and the strong endemism of the granitic
inselbergs in the Atlantic Forest will provide a great number of
new species. Apparently, this flora is less studied than those situated
in the forest strictly speaking and than those from the restingas
(coastal sandbank). This article described a big rupicolous Epidendrum
which makes, by certain aspects, thinking about Epidendrum warasii
Pabst or Epidendrum zappii Pabst, however it is strongly
distinguished from them when attentively studied as it is showed
here.
Epidendrum
josianae M. Frey & V.P. Castro
Richardiana V(2) April 2005
Planta herbacea, rupicola, in genero grandis, caulibus non pseudobulbsis,
strictis, distiche foliatis, foliis amplexicaulibus, crassis, ovatis,
apice rotundatis, inflorescencia terminale, in caulibus vetis producta,
paniculata cum 3-7 ramis, pedunculo rhachidique erectis, ramis patentibus,
unoquoque cum 4-7 floribus, pedicellis cum ovario 3-4 cm longis,
nutantibus, floribus olivaceis cum labelo albo-viridescente, sepalis
petalisque ovatis, concavis, labelo bilobato, coluna alba, anthera
lilacina.
Type
Brazil, Minas Gerais, in the municipality of Lajinha, Imbiruçu,
Pedra Santa, 20° 11’ S, 41° 26’ W, altitude
1 200 m, October 2004 (flowers), M.Frey 711 (holotype : MBML, n°22785).
Description
herbaceous, lithophyte, caespitose plant; Very short rhizome,
whitish fleshy roots, reaching 30 cm long, 6 mm diameter;
erect stem, slightly curved, with until 1,20 (1,50) m long,
2 cm diameter, very slightly flattened laterally, recovered with
scarious imbricate base with 2cm long, old leaves; leaves until
30 (40), distic, amplexicaul then extended, caniculated at the base,
elliptic with round edge, slightly retuse and dissimetric, glabrous,
smooth margins, prominent central nervure, abaxial, green, fleshy
lateral (1,2 mm thick); Erect terminal inflorescence, reaching
15 (20) cm, paniculate, strongly flattened (8 × 5 mm), provided
by scarious sheath applicate, soon deciduous, rachis 8 (10) cm long,
carrying until 6 short ramifications, extended, 4-7 flowers each
one; triangular acute, membranous sheaths 5 mm long, light green
spotted with red-wine; pedicel-ovaries nutant, reaching 40 mm long,
light green pedicel 10-15 mm long, 2 mm diameter, ovary 25-30
mm long, crescent diameter until 4 mm, purple, slightly hexa-sulcate;
well flattened flowers, at about 32 × 32 mm, olive-green
tepals, adaxial lateral, purple marks, mainly the sepals, abaxial
lateral; Elliptic concave, fleshy sepals, recurved edges,
slightly apiculate glabrous extremity, smooth margins, 3 nervures
visible (little) in transparence, more clearly when dry, (15)-18-(20)
mm long, (6)-8-(11) mm width; Oblong, fleshy, a little concave petals,
obtuse glabrous extremity, smooth margins, 3 nervures well
visible when dry, (12)-15-(18) mm long, (5)-7-(10) mm width; lip
adnate to the column along the length, forming a small 5 mm long
nail fused to the column, then fused towards the lower part, opening
in oval transverse lobe, 10-12 mm long, 14-18 mm width, white at
the base and at the center, green at the periphery, bilobate extremity,
external serrate margins, having at the end of the small nail two
white and semi-cylindrical calli that change into three white and
little prominent, the median twice bigger than the lateral ones;
column 8 mm long, slightly recurved, crescent width varying
from2 to 4 mm, 2 to 5 mm thickness, green at the base, becomes white,
supplied with two descendent wings with sub-retangular extremity
which hides the stigma; Triangular round white-pinkish terminal
anther, supplied by a median vertical callus and interiorly
provided of 4 anther-caps containing four yellow discoid-truncate
pollinia, at about 1,2 mm, gathered two by two over the flattened
with serrulate edges which are joined at the base over a small viscidium,
unknown capsule.
See drawing 1 and photographies.
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