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Acianthinae_species
Stigmatodactylus croftianus (Kores) Kores
Nomenclature
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Genus: StigmatodactylusSubgenus: Stigmatodactylus
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Synonyms: 2
- holotype: Kores WEI1679 (BPBM)
- isotype: Kores WEI1679 (BPBM)
- isotype: Kores WEI1679 (BPBM)
SUMMARY
Plant: Small, erect herb, 5-14 cm tall.
Tuber: Globose, 1-2 mm in diameter, whitish brown, finely villose.
Stem: Slender, angular, 5-8 cm long, light green, glabrous, enclosed at base by 1-3 cataphylls.
Cataphylls: Clasping, 5-7 mm long, 1-nerved, light green, distally free for 3-5 mm, the free portion acute.
Leaf: Cordate, 15-22 mm long, 10-16 mm broad, light green throughout, the base decurrent with the stem along the lateral edges, the apex abruptly acuminate or apiculate, the margin undulate; inflorescence up to 4 cm tall, laxly 1 - to 3-flowered.
Bracts: Broadly ovate. 5-6 mm long, 5-7 mm broad, light green, 3- to 5-nerved. base rounded or truncate, apex broadly acuminate.
Ovary: Cylindrical, 3-5 mm long, about 1 mm in diameter, 6-grooved; capsule fusiform, 8-10 mm long by about 4 mm in diameter.
Flowers: Ascending, pale green throughout.
Dorsal Sepal: Broadly spreading, linear-subulate, 9-12 mm long, about 0.5 mm broad, 1-nerved, glabrous, the apex narrowly acute.
Lateral Sepals: Broadly spreading, linear-subulate, 9-12 mm long, about 0.5 mm broad, 1-nerved, glabrous, the apex narrowly acute, slightly dissimilar from dorsal sepal.
Lateral Petals: Spreading, linear-subulate, 7-10 mm long, about 0.5 mm broad, 1 -nerved, glabrous, the apex subulate.
Labellum: Patent and usually slightly curved distally, broadly elliptical, 6-7 mm long. 5-6 mm broad, 7- or 9-nerved, the base truncate, the apex broadly obtuse and ultimately minutely apiculate, the point reflexed, 0.25-0.5 mm long, the lateral margins minutely crenulate distally, the disc with a single, large callus near the base and rarely with a few scattered, tooth-like accessory calli, the main callus prominently 3-lobed, 3-4 mm long, about 0.75 mm broad, about 1.5 mm tall, densely minutely pubescent throughout, the lateral lobes slightly longer than midlobe, more or less parallel, almost completely divided into 4-6 pairs of weakly ascending, blunt teeth, 0.25-0.5 mm long, the midlobe strongly ascending, aliform, somewhat thickened and weakly channeled distally along the upper margin, the apex inflexed, narrowly acute.
Column: 3-5 mm long, the basal 2/3 with a hyaline keel along the ventral surface, the keel with an acutely mucronate, wing- like appendage at apex, the apical 1/3 of column with two pairs of teeth along lateral edges of ventral surface; pollinia four, mealy, obliquely subdeltoid, about 0.7 mm long, about 0.4 mm broad, the viscidium small, transverse oblong; stigma transverse obovate, with a prominent, porrect, obtuse tooth along ventral margin.
Type: P. Kores & T. Surry WEI 1679 (Holotype: BISH)
Etymology: The specific epithet is given in honor of Mr. Jim Croft, of the Canberra Botanic Gardens, a longtime friend and professional associate of the author, who has provided assistance in my botanical endeavors in Papua New Guinea on numerous occasions.