Encyclia randii (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

32. Encyclia randii (Barb.Rodr.) Porto & Brade (1935: 29). Basionym: Epidendrum randii Barbosa Rodrigues

(1891: 123). Type:— BRAZIL. Rio Solimões , October, no collector (lectoype designated by Fowlie & Duveen (1992):

unpublished illustration by Barbosa Rodrigues in Iconographie des orchidées du Brésil: t. 5!) ( Figs. 20 , 26F ).

Synonym (no type):

Encyclia randiana (Barb.Rodr.) Withner (2000: 122) , nom illeg. Basionym: Epidendrum randianum Barbosa Rodrigues ex Stein (1892: 237) , nom inval.

Heterotypic synonym:

Encyclia randii var. rondoniensis González (1991: 47) , nom. inval. Type:— BRAZIL. Rondônia: Ariquemes–Guajará-Mirim , km 105, October 1986, Stivali s.n. (personal material).

Epiphytic herbs, up to 23.5 cm tall. Pseudobulbs ovoid, 2.5 × 1.0 cm. Leaves 1, oblong to linear, 20.6 × 0.5 cm, apex acute. Inflorescence a 4–8-flowered, simple raceme; peduncle c. 27.5 cm long; rachis c. 10.0 cm long. Flowers with pedicel 2.3−3.5 × 0.2−0.5 cm, warty; sepals purple, the dorsal lanceolate, 2.8−3.2 × 0.6−1.0 cm, laterals lanceolate to falcate, 2.7−3.3 × 0.7−0.9 cm, pendent, margin undulate, apex acute; petals purple, spatulate to falcate, 2.8−3.8 × 0.9−1.2 cm, pendent, margin undulate, apex acute to mucronate; lip with claw 0.14−0.25 × 0.40−0.60 cm, lateral lobes free relative to midlobe, 1.2−1.5 × 0.5−0.7 cm, white, at a ˂45° angle to the midlobe (in the flattened lip), sometimes overlapping it, margin entire, apex obtuse, midlobe reniform to quadrate, 1.1−2.2 × 1.3−2.9 cm, white with pink spot in the centre, flat, margin lobed, apex emarginate, callus cymbiform, acute; column clavate, 1.30−2.30 × 0.17−0.50 cm, clinandrium apex tridentate, lateral teeth horn-like, apex premorse, arms of the column quadrate, 0.1−0.2 × 0.2−0.3 cm, apex obtuse; stigma elliptic, with basal hooks; anther 1, yellowish, 0.5 × 0.3−0.4 cm.

Distribution and habitat:— Northern Brazil ( Fig. 19 ).

Phenology:— Flowering August–January.

Etymology:— Honouring the collector of the type, Edward Sprague Rand.

Taxonomic notes:— Encyclia randii is similar to E. cordigera in floral shape and colour; both species have flowers with purplish-brown sepals and petals with undulate margins and a white lip with a central pink spot. The main differences are that E. randii has a smaller, reniform to square midlobe, whereas in E. cordigera the midlobe is larger and elliptic.

Epidendrum randianum was not validly published by Barbosa Rodrigues ( Sprunger 1996) . Because Epidendrum randianum is invalid, the combination E. randiana proposed by Withner (2000) is also invalid. Unaware of the previous lectotypification by Fowlie & Duveen (1992), Meneguzzo et al. (2010) re-lectotypified this species with the same illustration.

Encyclia randii var. rondoniensis has been recorded thus far only in Rondônia State; it is a variant of E. randii that differs in its larger midlobe, both length and width, that is square with an emarginate apex. However , this is an invalid name because the type was not designated in the protologue ( McNeill et al. 2012). The authors also failed to specify the herbarium in which the type was deposited (article 40.7).

Selected specimens examined: BRAZIL. Amazonas: Iranduba, road to Novo Airão, 16 January 2002, Salles et al. 4089 (HEPH). Pará: Água Azul do Norte, Xinguara− São Félix do Xingu road, 23 August 1996, Silva 588 (MG); Altamira, Xingu River, 17 August 1986, Dias et al. 32 (MG); Marabá, Carajás, 15 September 1984, Silva 39 (MG); Monte Alegre, Maicuru River, 18 December 1990, Silva & Silva 141 (MG); Óbidos, Sapucuá, 25 October 1913, Ducke s.n. (MG 15050, SP 40314); São Félix do Xingu, 214 m, 15 August 2001, Salles et al. 2254 (HEPH, MBM). Rondônia: Alvorada d’Oeste, bed of the dry bayou, 27 October 1986, Lobato et al. 302 (MG); Vilhena, 14 October 2009, Bastos 309 (HUEFS).

Figures

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

FIGURE 20. A−H. Encyclia pauciflora. A. Dorsal sepal. B. Lateral sepal. C. Petal. D. Lip. E. Detail of lip callus. F. Column front view. G. Column side view (Bastos 287). H. Variation in the lip (Jung s.n. HB 2581). I−S. Encyclia randii. I. Habit. J. Dorsal sepal. K. Lateral sepal. L. Petal. M. Lip. N. Detail of lip callus. O. Column front view. P. Column side view (Salles 4089). Q. Variation in the lip (Bastos 292). R. Variation in the lip (Pires s.n. HB 41031). S. Variation in the lip (Bastos 309). T−W.Encyclia seidelii. T. Dorsal sepal. U. Lateral sepal. V. Petal. W. Lip (Seidel 1111). 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).