Aganisia fimbriata Reichenbach (1874: 452)

Thiago E. C. Meneguzzo, José F. A. Baumgratz & Cássio Van Den Berg, 2015, Taxonomic studies in the Aganisia complex (Orchidaceae, Zygopetalinae), Phytotaxa 238 (1), pp. 1-39 : 9-11

1.2. Aganisia fimbriata Reichenbach (1874: 452) .

Acacallis fimbriata (Rchb.f.) Schlechter (1918a: 16) . Type:— GUYANA. Demerara: ex hort., s.d., Sillem s.n. (lectotype,, designated here, W-R 40596!). Fig. 1 B, 2C–E

Aganisia caerulea Reichenbach (1876: 226) . Acacallis caerulea (Rchb.f.) Schlechter (1918a: 14) . Type: BRAZIL. S.loc., ex hort., s.d., s.leg. s.n. (type W-R not found). Type:—BRAZIL. Pará: Moju, Fazenda Bonal, ca. 50 km W from road PA-150, 30 km of access to Tailândia, 24 August 1991, Vieira, Skorupa & Pereira da Silva 861 (neotype, designated here, CEN 15650!, isoneotypes HEPH s.n.!, SP 318547!).

Aganisia oliveriana Reichenbach (1878: 558) . Acacallis oliveriana (Rchb.f.) Schlechter (1914: 419) . Type:—BRAZIL. S. loc., ex hort., July 1876, s. leg. s.n. (lectotype, designated here, W-R 40589 only upper left packet!). S. loc., ex hort., s.d., s. leg. s.n. (original material W-R 33794!); ex hort., June 1876 / December 1877 / 15 April 1878 / s.d., s.leg. s.n. (original material W-R 40588 four icons!).

Etymology:— From the Latin, fimbriatus, fringed, referring to lip margin.

Epiphytic herbs. Pseudobulbs 4.0–5.5 × 0.8–1.3 cm, fusiform. Leaves with petiole 1.5–3.5 cm long; blade 21.0– 27.0 × (3.0–)4.5–6.0(–7.9) cm, elliptic to narrowly elliptic, base attenuate, apex acute. Inflorescence 9–21 cm long, 3–5(–9)-flowered; peduncle 8–12 cm long; rachis 1.5–7.5 cm long. Flowers with pedicellate ovary 0.9–1.6 cm long; sepals, petals and lip lilac. Sepals 1.5–1.8 × 0.8–1.1 cm, narrowly ovate, base cuneate, apex acute, laterals oblique. Petals 1.4–1.5 × 0.4–0.6 cm, narrowly elliptic, base cuneate, apex obtuse. Lip with lateral lobes 0.4–0.6 × 0.2–0.3 cm, semi-trullate, highly constricted distally, callus in distal part, hippocrepiform, laminar, antrorse, margins erose; midlobe 0.9–1.3 × 0.6–0.9 cm, elliptic to ovate, base and apex rounded, margin frimbriate, longer in proximal half than distally. Column 0.6–0.7 × 0.2–0.3 cm, semi-terete; anther cap with digitiform apex; rostellum remnant trilobed, midlobe acute and longer to truncate lateral ones. Capsule 4.0–4.5 × 0.8–1.2 cm, fusiform.

Material examined:— BRAZIL. Acre: Cruzeiro do Sul, 14 February 1976, Monteiro & Damião 362 (INPA); 28 February 1976, Ramos & Mota 144 (INPA). Amazonas: Estrada de Munguba, 20 June 1969, Silva 2148 (IAN); Margem do rio Jarí, 20 May 1969, Silva 1998 (IAN); Coari, 13 March 2007, Rocha & Petrobom 640 (MG); Manaus, 20 March 1955, Chagas s.n. (HB); 18 March 1974, Prance et al. 20687 (INPA, NY); S"o Gabriel da Cachoeira, 10 June 1995, Silva 413 (MG). Pará: s.loc., 15 May 1975, Corrêa 68 (HB); Almeirim, 10 June 1969, Silva 2148 (IAN); Benevides, 18 April 1994, Silva 316 (MG); Itaituba, 6 May 1983, Amaral et al. 1194 (INPA, NY). GUYANA. Upper Takutu-Upper Essequibo: Kuyuwini Landing, Kuyuwini river, 16 October 1992, Jansen-Jacobs et al. 2966 (U). PERU. Huánuco: Pachitea, 2 March 1967, Schunke V. 1701 (F). Loreto: Maynas, 4 September 1974, Foster & Foster 4089 (F); 13 August 1980, Foster 4434 (MO); 21 July 1980, Gentry 28881 (MO); 19 March 1982, Gentry et al. 36487 (MO); 5 June 1985, Vásquez et al. 6540 (MO); 28 July 1988, van der Werff et al. 9829 (MO); 18 August 1988, van der Werff et al. 10192 (MO); 24 November 1929, Killip & Smith 29984 (NY); April 1930, Klug 1239 (F, NY); April 1930, Klug, 1257 (F, NY). San Martín: Chazuta, March 1935, Klug 3985 (AMES, F, K, MO, NY). Ucayali: Coronel Portillo, 21 June 1981, Young 981 (NY). VENEZUELA. Amazonas: San Carlos de Río Negro, 27 October 1970, Rutkis 219 (VEN); 17 May 1979, Liesner 7508 (VEN).

Distribution:— Guyana, Venezuela, Peru and Brazil:Acre, Amazonas, Pará. TDWG code: 82 GUY-OO VEN-OO 83 PER-OO 84 BZN-AC BZN-AM BZN-PA.

Diagnostic characters:— Distinguished by its lilac flowers, lip with lateral lobes strongly constricted, callus hippocrepiform, antrorse callus with erose and laminar margins, and midlobe strongly concave, elliptic to ovate with fimbriate margin.

Nomenclatural notes:— For Aganisia caerulea, Schultes (1958) reported being unable to locate the type at W-R, and due to lack of information in the protologue it is not feasible to determine if any of the specimens at W-R are types. Thus, we selected here a neotype.

Herbarium sheet W-R 40589 named as Aganisia oliveirana contains four flower spikes, three leaves and three capsules. The packet chosen as a neototype is the only one that contains a flower and was identified by Reichenbach as “ Aganisia H.H. July 1976 ”. AMES 68569 must not be considered part of the neotype because it is not possible to make a connection between the two sheets.

Figures

FIGURE 1. Distribution of Aganisia. A. Aganisia cyanea f. alba (rhombus), A. cyanea f. cyanea (dot). B. Aganisia fimbriata. C. Aganisia pulchella.

FIGURE 2. Aganisia cyanea f. cyanea. A. Flower. B. Dissected perianth of A. fimbriata. C. Habit. D. Flower. E. Dissected perianth of A. pulchella. F. Flower. G. Dissected perianth. A–B Lima et al. 5663 (RB). C–E Kluge 1239 (F). F–G from Ducke s.n. (MG). By Maria Alice Rezende.