Encyclia thienii Dodson

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

35. Encyclia thienii Dodson (1989: t. 458). Type:— ECUADOR. Pastaza: Fazenda San Antonio de Baron von Humboldt, 2 km north of Mera on the Baños-Puyo road, 1100 m, 14 March 1985, Dodson et al. 15726 (holotype: MO) ( Figs. 21 , 26J ) .

Epiphytic herbs, 6.0−26.0 cm tall. Pseudobulbs conical, 1.5−5.5 × 0.6−1.2 cm. Leaves 1−2, oblong to oblanceolate, 4.2−20.0 × 0.5−1.2 cm, apex acute. Inflorescence a 2−7-flowered, simple raceme; peduncle 4.2−16.4 cm long; rachis 0.5−5.8 cm long. Floral pedicel 1.7−2.4 × 0.2 cm; sepals lime green, dorsal lanceolate, 1.2−1.8 × 0.3−0.4 cm, laterals lanceolate, 1.1−1.2 × 0.3−0.4 cm, pendent, margin entire, apex acute; petals lime green, spatulate, 1.1−1.2 × 0.4 cm, pendent, margin entire, apex acute to mucronate; lip claw 0.15−0.20 × 0.10−0.15 cm, lateral lobes free relative to midlobe, 0.6 × 0.2−0.3 cm, white, at a 90° angle to the midlobe (in the flattened lip), not overlapping it, margin entire, apex obtuse, midlobe elliptic-ovate, 0.5 × 0.4 cm, white with few pinkish streaks, conduplicate, margin undulate, apex pointed, callus cymbiform, acute; column clavate, 0.6−0.7 × 0.2 cm, clinandrium apex tridentate, lateral teeth triangular, apex acute, column arms, 0.10−0.15 × 0.10−0.15cm, apex obtuse; stigma elliptic, with basal hooks; anther one, yellow, 0.12−0.15 × 0.15−0.20 cm.

Distribution and habitat:— Previously known only from Ecuador (Govaerts et al. 2013; Dodson 1989), this species is for the first recorded for Brazil, where it has been collected in Amazonas and Pará States ( Fig. 19 ). It is likely that it should be present also in the Peruvian Amazon.

Phenology:— Flowering May–January.

Etymology:— Honouring Leonard Thien, who helped collect the type.

Taxonomic notes:— Encyclia thienii is easily confused with E. chloroleuca and has been considered a synonym of the latter by Withner (2000). However, E. thienii is smaller (ca. 6–26 cm) in relation to E. chloroleuca (ca. 35 cm), and the lip midlobe of E. thienii is elliptic with an apiculate apex, whereas E. chloroleuca it is rounded with a truncate apex.

Selected specimens examined: BRAZIL. Amazonas: Manaus, INPA Campina Biological Reserve, 15 March 1975, Braga 2809 (INPA); Santa Isabel do Rio Negro, February 1991, Silva & Silva 146 (MG). Pará: Oriximiná, Porto Trombeta, 16 January 2010, Silva 3353 (MG); Ourém, Butuira Farm, 21 May 1994, Silva 325 (MG).

Figures

FIGURE 19. Distribution in Brazil of Encyclia pauciflora, E. randii, E. seidelli, E. spiritusanctensis, E. thienii and E. unaensis.

FIGURE 21. A−G. Encyclia spiritusanctensis. A. Dorsal sepal. B. Lateral sepal. C. Petal. D. Lip. E. Detail of lip callus. F. Column front view. G. Column side view (Bastos 326). H−N. Encyclia thienii. H. Dorsal sepal. I. Lateral sepal. J. Petal. K. Lip. L. Detail of lip callus. M. Column front view (Silva 3353). N−U. Encyclia unaensis. N. Habit. O. Dorsal sepal. P. Lateral sepal. Q. Petal. R. Lip. S. Detail of lip callus. T. Column front view. U. Column side view (Azevedo & Alves 4). Illustration by Carla de Lima.

FIGURE 26. A. Encyclia oncidioides. B. Encyclia osmantha. C. Encyclia patens. D. Encyclia patens var. serroniana. E. Encyclia pauciflora. F. Encyclia randii. G. Encyclia replicata. H. Encyclia seidelii. I. Encyclia spiritusanctensis. J. Encyclia thienii. K. Encyclia unaensis. L. Encyclia viridiflora. M. Encyclia xerophytica. (Photographers:A−C, E−M: C. van den Berg. D: A. Peres Júnior).