Finding
SITF confirms that this plant is Maxillaria bicentenaria (Jan 2024). This plant matches the description and photos of M. bicentenaria species in the Novataxa paper: "Species New to Science" novataxa.blogspot.com/2021/09/maxillaria-bicentenaria.html. The species is similar to M. pyhalae, but differs in the shape of the lip, callus and a keel-shaped ridge towards the top of the anther. There is an excellent article in Researchgate, "An Homage to Peru's Bicentenary Maxillaria bicentenaria orchidaceae, A New Species previously misidentified as M. pyhalae". This article has excellent photos, drawings and descriptions comparing and contrasting the two species.
Overall Length Of Growth Cane: 47 cm
Number Of Leaves Per Growth Or Cane: 2
Leaf Length: 42 cm
Leaf Width: 5.2
Leaf Margin: rolled underneath
Leaf Shape: lanceolate
Leaf Petiole Length: 12 cm
Pseudobulb Length: 5.5 cm
Pseudobulb Width: 4.0 cm
Pseudobulb Margin: fusiform
Pseudobulb Distance: 11 cm
Pseudobulb Root Tip: not visible
Inflorescence Overall Length: 32 cm
Inflorescence Arrangement: upright, curved at apex, flower facing backwards
Inflorescence Dist Base To Bud: 32 cm
Inflorescence Dist Bet Flowers: n/a
Inflorescence Dist To Sepal: 4 cm
Floral Bracts Length: 4.5 cm
Floral Bracts Width: 2 cm
Ovary Length: 4 cm
Ovary Width: .4 cm
Ovary Shape: sickle shape...half circle
Ovary Color: dark brown
Ovary Texture: 6 longitudinal ridges glabrous, slightly smurfy
Flower Natural Spread Length: 4.2
Flower Natural Spread Width: 3.8
Dorsal Sepal Length: 3.8
Dorsal Sepal Width: 0.8
Dorsal Sepal Cauda Length: 0
Dorsal Sepal Cauda Width: 0
Lateral Sepals Length: 4.0
Lateral Sepals Width: 1.7
Lateral Sepals Caudae Length: 0
Lateral Sepals Caudae Width: 0
Petals Length: 3.1
Petals Width: 1.5
Judging Center: WPBJC
Award Number: 20231686
Award Date: November 16, 2023
Awarded As: CBR
Daniel Piedrahita, Country of origin Peru, previous identification provided by Kew Gardens. Pending SITF identification66cm total length, upright climbing rhizome, one inflorescence per bulb, flower ovary curves to make flower face inward.