Encyclia yauaperyensis (Barb. Rodr.)

Bastos, Cláudia A., Meneguzzo, Thiago E. C. & Berg, Cássio Van Den, 2018, A taxonomic revision of the Brazilian species of Encyclia (Orchidaceae: Epidendroideae: Epidendreae), Phytotaxa 342 (1), pp. 448-450 : 448-450

39. Encyclia yauaperyensis (Barb. Rodr.) Porto & Brade (1935: 29) as “ jauaperiensis ”. Basionym: Epidendrum yauaperyense Barbosa Rodrigues (1891: 1223) . Type:— BRAZIL. Rio Yauapery, March, no collector (lectoype designated by Meneguzzo et al. (2010): illustration by Barbosa Rodrigues (AMES) published in Iconographie des orchidées du Brésil 4: t. 855, reproduced in Sprunger et al. 1996: 268, t. 5B!) ( Fig. 22 , 23 ).

Epiphytic herbs, 50.0 cm tall. Pseudobulbs conical, 9.4 × 2.3 cm. Leaves 2, lanceolate, 41.4 × 1.7 cm, apex acute. Inflorescence a densely 6−15-flowered, compound raceme; peduncle c. 35.0 cm long; rachis 16.0 cm long. Floral pedicel c. 2.3 × 0.1 cm, warty; sepals green-olive, brown stained, dorsal lanceolate, 1.7 × 0.4 cm, laterals lanceolate, 1.7 × 0.4 cm, pendent, margin entire, apex acute; petals green-olive, brown stained, spatulate, 1.7 × 0.4 cm, pendent, margin entire, apex acute; lip claw 0.1 × 0.2 cm, lateral lobes free relative to midlobe, 0.8 × 0.4 cm, greenish, at about a 45° angle to the midlobe (in the flattened lip), not overlapping it, margin entire, apex obtuse, midlobe vertical elliptic to narrow triangular, 0.8 × 0.4 cm, yellowish, sinuous, margin undulate, apex mucronate to acute, callus cymbiform, bifid; column dolabriform, 0.6 × 0.3 cm, clinandrium apex tridentate, lateral teeth triangular, apex acute, arms of the column linear, 0.15 × 0.08 cm, apex obtuse; stigma elliptic, with basal hooks; anther 1, pinkish.

Distribution and habitat:— Endemic to the Amazon ( Fig. 22 ).

Phenology:— Flowering January–April.

Etymology:— A reference to the original location of the type near the Yauaperi River, Amazonas State.

Taxonomic notes:— Encyclia yauaperyensis has flowers that are distinctive for the genus, especially the broad midlobe, which varies from vertical-elliptical to narrow and triangular, with a mucronate to acute apex and triangular lateral lobes.

Selected specimens examined:— BRAZIL. Amazonas : Beruri , Ayapuá Lake (Purús River), 22 January 2000, Silva s.n. ( SP 340014 ) ; margin of the Uaupés River , April 1973, Richter. s.n. ( HB 87612 ) ; no locality, January 1957, Stern s.n. ( HB 177 ) .

Figures

FIGURE 22. Distribution in of for E. viridiflora, E. xerophytica and E. yauaperyensis.

FIGURE 23. A−I. Encyclia viridiflora. A. Inflorescence (Bastos 329). B. Flower pedicel. C. Dorsal sepal. D. Lateral sepal. E. Petal. F. Lip. G. Column front view. H. Column side view (Bastos 324). I. Variation in the lip (s. leg. K 583894). J−P. Encyclia xerophytica. J. Dorsal sepal. K. Lateral sepal. L. Petal. M. Lip. N. Detail of lip callus. O. Column front view. P. Column side view (Meneguzzo 474). Q−W. Encyclia yauaperyensis. Q. Dorsal sepal. R. Lateral sepal. S. Petal. T. Lip. U. Detail of lip callus. V. Column front view. W. Column side view (Stern s.n. HB177). Illustration by Carla de Lima.