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Bulbophyllum giriwoense J.J.Sm., Bull. Jard. Bot. Buitenzorg, II, 13: 71 (1914).This name is accepted.

Distribution: New Guinea

Award number 20124311

Northeast Judging Center

B. giriwoense J.J. Sm.,
Bull. Jard. Bot. Buitenz. s. 2, 13: 71, 1914; Nova Guinea 12: 424, 1916
{Section Brachypus}

Description: Habit creeping epiphyte; roots arising
along rhizome; rhizome elongated, branched, c. 0.37 in diam., final
internode (under pseudobulb) short, discoid, almost as wide as pseudobulb; pseudobulbs
c. 2.8 apart, at an acute angle to rhizome, elongated, linear, compressed,
elliptical in transverse section, with two grooves in front, angles obtuse,
fleshy, unifoliate to 7.0 x 0.8; leaves lanceolate, obtuse, margins
recurved at apex, base gradually narrowed, folded, leathery, c. 18.0 x 3.6; inflorescence
arising from rhizomal nodes, probably in groups, single-flowered; peduncle
c. 7.4 l., with tubular bracts
slightly enlarged towards apex, acute, keeled, c. 0.75 l.; floral bracts tubular, acuminate,
acute, keeled, c. 0.88 l.; pedicel
c. 6.0 l., with a joint c. 0.7 above
base; ovary 6-grooved, c. 0.7 l.;
flowers size average for section, violet; dorsal sepal oblong-ovate,
subacute, very concave, margins incurved towards apex, 7-veined at base, veins
reticulated, c. 1.9 x 0.78; lateral sepals oblique, oblong, acute,
concave, margins incurved particularly towards apex, c. 6-veined, reticulated,
thickened towards base on inside, lower half with dense warts on inside,
remainder smooth, c. 1.95 x 0.7; petals small, oblong-elliptical,
slightly contracted towards base, apex obtuse, slightly recurved, very concave,
apical two-thirds downy-papillose on inner and outer surfaces, 1-veined, c. 0.6
x 0.3; lip small, recurved, tongue-shaped, narrowly obtuse, base
truncate-excavate, margins elevated towards base, channel thus formed v-shaped
with two low, obtuse ridges inside, margins in basal third ciliated, underside
with two wide, downy-papillose ridges separated by a channel, 0.5 x 0.2; column
slightly laterally compressed, with two wide, obtuse, triangular wings, c.
0.57 l.; stelidia elongated,
awl-like, longer than anther. Reference:
Smith, 1916 [in Latin & German]

Illustration: Smith, 1916 Fig. 160, 301

Distribution: Papua New Guinea (JJS'16)

Habitat: Grows as a forest epiphyte (JJS'16)

Flowering: In July (JJS'16); in Mar.-Apr., Aug.-Sept.

Similar species: Closely related to B. lorentzianum J.J. Sm.
from which it may be distinguished by its narrower pseudobulbs and leaves, much
longer peduncle and with regards to the flower, longer, narrower sepals, thinner
lip, shorter stelidia and different coloration (JJS'16). Also resembles B. brevilabium Schltr.

B. brevilabium Schltr.,
Orch. Germ. New Guinea. 808, 1928 {Section Brachypus (Sch)}

Description: Habit creeping epiphyte, 15.0-25.0 tall; roots
smooth, slender, arising from each internode; rhizome short, to 0.4 in
diam.; pseudobulbs 2.0-4.0 apart, narrowly conical, unifoliate, to 3.5 x
0.65; leaves erect, obliquely strap-shaped, subacute to minutely
apiculate, base gradually narrowing into a petiole, 20.0 x 2.2; petiole <1.0 l.; inflorescence single-flowered; peduncle
short, with few bracts, to 2.5 l.;
floral bracts small, many times shorter than the very long pedicel;
pedicel and ovary c. 3.5 l.; flowers
erect, yellow densely dotted brown, petals pale with violet spots, lip white
spotted violet; dorsal sepal oblong-lanceolate, acute, 1.1 l.; lateral sepals obliquely oblong,
somewhat obtuse, 1.4 l.; petals
obliquely oblong, somewhat obtuse, margins obtusely angled above base, margins
in apical half papillose, 0.4 l.; lip
broadly rhomboid, narrowed towards apex, obtuse, recurved, fleshy, 0.4 l., distinctly shorter than column; column
average; stelidia slender, linear, subacute, with an obtuse tooth on
the upper margin near base. Reference:
Schlechter, 1928 (trans.1982) [in Latin]

Illustration: Schlechter, 1928 (trans.1982) Fig. pg. 919; Cootes,
1997

Distribution: (Germ.) New Guinea (Sch)

Habitat: Alt. c. 700
m. as an epiphyte growing in the lower areas of the mist forest on
perpendicular tree trunks with scant moss (Sch)

Flowering: In Sept. (Sch)

Similar species: B. giriwoense
J.J. Sm.; B. lorentzianum J.J.
Sm.

B. lorentzianum J.J. Sm.,
Bull. Dép. Agr. Ind. Néerl. 39: 3, 1910 {Section Brachypus (Sch)}

Description: * Habit creeping epiphyte; rhizome elongated, branched, c. 0.35-0.5 in diam.;
pseudobulbs c. 3.0 apart, erect, elongated, compressed, obtusely
quadrangular in cross-section, broadly channelled longitudinally, unifoliate,
to 6.5 x 1.2; leaves erect, lanceolate, recurved at obtuse, apiculate
apex, base narrowed to petiole, to 18.0 x 5.0; petiole short, robust, to
1.5 l.; inflorescence from
rhizomal nodes, single-flowered; peduncle c. 2.0 l.; floral bracts
appressed, tubular, acute, keeled
bracts to 0.6 l.; pedicel c. 4.4
l.; ovary shiny, 6-grooved, c. 0.5 l.; flowers moderately open, c.
2.0 wide, dorsal sepal greenish yellow, lateral sepals yellow, dotted dingy
purple on lower half, petals yellow in basal half, paler and spotted and
margined dark purple towards apex, lip whitish spotted dark purple, base
yellow; dorsal sepal ovate, acute, 5-veined, very concave, fleshy, shiny
on both sides, c. 1.75 x 0.95; lateral sepals horizontal, decurrent on
column-foot, obliquely ovate, acute, falcate, basal half verrucose, c. 2.0 x
0.85; petals small, obovate-oblong, very obtuse, concave, margin finely
ciliated in apical half, c. 0.43 x 0.28; lip small, fleshy, laterally
compressed, acute, base with two rounded lateral lobes, surface with two
longitudinal, papillose ridges, two smaller ridges between these at base, c.
0.48 x 0.2; column thick, laterally compressed, shiny, greenish yellow,
c. 0.63 l.; stelidia parallel,
arching, broadly triangular, obtuse, sparsely dotted dark purple; scent not unpleasant, slightly fishy smell. Reference: Smith, 1911a [in Latin
& Germ.]

Illustration: Smith, 1911a Fig. 99A

Distribution: (Dutch) New Guinea (Sch)

Habitat:
[not given]

Similar species: Smith, 1911a expresses the opinion that this species,
more or less, occupies a transition position between the sections Sestochilus
and Monanthaparva with closer affinities to the former. Various features
suggest, to him, relationships with B. pahudii Rchb.f., B.
binnendijkii J.J. Sm. and B. uniflorum Hassk.

* Note: A plant in the author’s
collection is undoubtedly this species but has dimensions for the inflorescence
and floral segments which are quite different from those given by Smith. The peduncle is up to 20.0 l., the dorsal sepal 2.6 x 0.8, the lateral
sepals 2.6 x 0.95, the petal very glandular-papillose towards apex, 0.6 x 0.3,
the lip surface papillose, margins and lateral ridges spinous towards base, 0.5
x 0.19, and the stelidia finger-like, obtuse with a small slightly bifid tooth
along the upper margin and a low rounded wing lateral to the stigma.

Bulbophyllum giriwoense , award number 20124311 , has been confirmed to be Bulbophyllum lorentzianum by SITF (July 2012), with assistance of Doris Jensen.

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