Aganisia pulchella Lindley (1839

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 : 11

1.3. Aganisia pulchella Lindley (1839 : misc. 45). Type:—GUYANA. Demerara: ex hort., s.d., Brotherton sub Messrs. Loddiges s.n. (lectotype, here designated, K-L 718362!). Fig. 1 C, 2F–G , 3D

Aganisia brachypoda Schlechter (1925: 126) . Type:—BRAZIL. Amazonas: S"o Gabriel da Cachoeira, River Içana, track in the end of airstrip, 1 September 2008, Fiaschi, Ricardo, Lizardo & Henrique 3262 (neotype, designated here, SPF 186328!). The original type was destroyed: BRAZIL. Amazonas: S"o Gabriel da Cachoeira, Taracuá, High River Negro, March, Hübner 168 (type B†).

Etymology:— From Latin, pulchellus, pretty, due to the beauty of the flowers.

Epiphytic and possibly hemiepiphyte herbs. Pseudobulb 1.8–3.5 × 0.2–0.3 cm, fusiform. Leaves with petiole 2.0– 3.4 cm long; blade 2.0–3.1 × 11.5–18.5 cm, narrowly elliptic, base attenuate, apex acute. Inflorescence 2–3-flowered, 7.5–9.5 cm long; peduncle 5.0–7.5 cm long; rachis 1.5–3.5 cm long. Flowers with pedicellate ovary 0.9–1.4 cm long; sepals and petals white, lip white with disc yellow and red calli, midlobe with yellow face. Sepals 1.5–1.9 × 0.6–0.8 cm, narrowly ovate, base cuneate, apex acute, the laterals oblique. Petals 1.4–1.8 × 0.5–0.6 cm, narrow-elliptic, base cuneate, apex acute. Lip with lateral lobes 0.3–0.4 × 0.2–0.3 cm, semi-trullate, unconstricted, distal portion with hippocrepiform callus with longitudinal and irregularly denticulate lamina, the external pair higher than the inner; midlobe 0.7–0.9 × 0.9–1.1 cm, ovate, base rounded to cordate, apex obtuse, margin entire. Column 0.4–0.5 × 0.2–0.3 cm, semi-terete; anther cap apex obtuse-denticulate; rostellum remnant trilobed, midlobe acute and longer than the lateral ones, lateral trucates. Capsule 2.5–3.2 × 0.8–1.2 cm, fusiform.

Material examined:— BRAZIL. Bahia: Between Porto Seguro and CEPLAC, 28 November 1970, Mello Filho & Emmerich 3013 (CEPEC); Porto Seguro, 29 May 2014, Cavalcanti et al. 713 (UFP); Una, 9 November 2014, Meneguzzo et al. 841 (RB). Maranh"o: 10 km do rio Guripi, 7 January 1994, Silva 224 (MG). Pará: Belém, 2 July 1914, Ducke s.n. (MG, RB); June 1989, Silva 15 (MG); Igarapé do Una, 1877, Jobert 83 (P); Ourém, 2 July 1999, Silva 664 (MG). FRENCH GUYANA. Cayenne: Fleuve Approuague, 29 August 1977, Sastre 5797 (P); Montagne des Nouragues, 13 April 1989, Sarthou 516 (P); Mont Chauve, April 1989, Larpin 514 (P); October 1989, Larpin 682 (P); 19 April 1992, Larpin 1040 (P); 19 April 1992, Larpin 1041 (P); 20 April 1997, Villiers & Sarthou 6137 (P). GUIANA. S.loc., s.d., im Thurn 13 (K). Barima-Waini:Anabisi River, 15 February 1922, de la Cruz 1370 (NY). Cuyuni-Mazaruni. Bartica, 3 August 1922, de la Cruz 2000 (MO, NY); Mazaruni River, 4 October 2006, Redden et al. 4552 (K, NY); Membaru, 29 October 1951, Maguire & Fanshawe 32341 (K); Upper Mazaruni River, 4 November 1922, Leng 21 (NY). Demerara-Mahaica: Georgetown, 22 November 1919, Hitchcock, 16992 (GH, NY). SURINAME. Marowijne: Moengo, 8 October 1948, Lanjouw & Lindeman 730 (U). Para: Jodensavanne, 16 January 1961, Kramer & Hekking 2657 (U); 14 May 1954, Lindeman 3956 (AMES, U). Paramaribo: fluminis Paramaribo, 17 November 1971, Teunissen & Teunissen 11090 (U). Sipaliwini: Lely Mountains, 2 October 1975, Lindeman et al. 657 (U). Wilhelmina Gebergte , 28 July 1963, Irwin et al. 54475 (F, U). Suriname: Paramaribo, 17 December 1962, Wessels Boer 355 (U). TRINIDAD AND TOBAGO. Trinidad: Tunapuna-Piarco, Aripo Savanna, 5 March 1920, Cocker & Rowland s.n. (K, NY); Saint Andrew, 5 March 1920, Cocker & Rowland s.n. (NY). VENEZUELA. Bolívar: El Callao, 29 December 1956, Foldats 2675 (AMES); southeast of Hato de Nuria, 25 January 1961, Steyermark 88818 (MO). Mérida: Bolívar, Paujil, 28 March 1956, Bernardi 2994 (G).

Distribution:— Trinidad, French Guiana, Guyana, Suriname, Venezuela, northern and northeastern Brazil: Amazonas, Bahia Maranh"o, Pará. TDWG code: 81 TRT-OO 82 FRG-OO GUY-OO SUR-OO VEN-OO 84 BZE-BA BZE-MA BZN-AM BZN-PA.

Diagnostic characters:— Characterized by white sepals and petals with yellow disc, lateral lobes unconstricted, hippocrepiform callus with longitudinal and irregularly denticulate lamina, the external pair higher than the inner, and midlobe ovate with entire margin.

Nomenclatural note:— The specimen of Aganisia brachypoda chosen as the neotype is from same type locality as the original destroyed material, and its morphology agrees with the information in the protologue.

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.