Cheiradenia cuspidata Lindley (1853b: 1)

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 : 12-15

2.1. Cheiradenia cuspidata Lindley (1853b: 1) .

Type: — FRENCH GUYANA. S.loc., s.d., Leprieur 108 (lectotype, designated by Christenson (1996: 14), K-L 857193!, isolectotype P 612125!); idem, Leprieur 114 (remaining syntype K-L 857194, P 612124). Fig. 3 E, 4 , 5A–C

Cheiradenia imthurnii Cogniaux (1906a: 481) . Type: — FRENCH GUYANA. Pomeroon, Waini Falls, 19 February 1883, im Thurn 1966 (lectotype, designated by Christenson (1996: 14), K 589033!, isolectotype BR 564050 !).

Etymology:— From Latin, cuspidatus, sharp, acute, in reference to the apex of the lip keel.

Epiphytic herbs. Pseudobulbs 0.3–0.5 × 0.3–0,4 cm, ovoid. Leaves with petiole 0.2–0.3 cm long; blade (2.0–)3.5– 6.5 × (0.5–)0.9–1.8 cm. Inflorescence 4.5–8.5 cm long, 2–5 flowered; peduncle 4.0–8.0 cm long, rachis 0.2–0.7 cm long. Flowers with pedicellate ovary 0.3–0.4 cm long; sepals, petals and lip whitish-rose and lip whitish-rose with dark red concentric, transverse-oblong spots, lip callus yellow. Sepals 0.20–0.25 × 0.20–0.25 cm, base cuneate, apex obtuse. Petals 0.20–0.25 × 0.20–0.25 cm, obovate, base not cuneate, apex rounded. Lip 0.3-0.4 × 0.3–0.4 cm, weakly trilobed, transversely oblong, strongly concave, margins erect, apex truncate. Column 0.3–0.4 × 0.2 cm, semi-terete. Capsule 0.6–0.8 × 0.3–0.6 cm, ellipsoid.

Material examined:— BRAZIL. Amapá: Calçonoe, Rio Carnot, 1898, Geay s.n. (P). FRENCH GUYANA. Cayenne: Crique Jean-Pierre, 7 December 1994, Cremers et al. 13558 (P); eastern plateau of Montagne Tortue, 12 June 1988, Feuillet & Montagne Tortue expedition members 10001 (MO, NY, U); Haut Oyapock, 22 March 1976, Sastre 4507 (M, P); Kaw, 10 March 1994, Chauvet, & Chiron s.n. (P); Korou, 1877, Crevaux s.n. (P); Montagne Bellevue de l’Inini, 22 August 1985, de Granville 7739 (P, U); 25 August 1985, de Granville 7822 (P, U); Monts Bakra, 17 June 2002, de Granville et al. 14834 (P); Montagne des Chevaux, 25 March 2009, Tostain et al. 2711 (P); Montagne de Kaw, 11 February 1980, Cremers 6298 (P); Mont Bakra, 15 April 1993, Cremers 13110 (P, U); Mont Saint-Marcel, 24 July 2002, de Granville et al. 15449 (P); Montagnes de la Trinité, Sommet Nord, 9 January 1984, de Granville 5793 (BR, P, U); Petit Saut, 25 February 1988, Billiet & Jadin 4478 (BR); 18 February 2009, Billiet & Jadin 8332 (BR); Saint-Elie, 15 September 2000, de Granville et al. 14083 (NY, P); Station des Nouragues, 24 August 1987, Feuillet 4281 (P); December 1989, Larpin 818 (P); 30 March 1992, Larpin 1019 (P); 4 March 1987, Prévost 2224 (P); Richard s.n. (BR). Saint Laurent du Maroni: Charvein, 15 February 1914, Benoist, 1311 (P); Montagne de l’Inini, 10 April 1986, Feuillet 3370 (P). Saül: March 1993, Billiet & Jadin 5812 (BR); 8 August 1993, Mori et al. 23176 (NY); Eaux Claires, 11 February 1993, Mori et al. 22931 (NY). GUYANA. Carsona Head, March 1938, Beddington 65 (K); Mabura Hill, 28 October 1981, Maas et al. 5904 (U); Risque Tout near Montsinéry, 22 June 1988, Maas et al. 7122 (U). Cuyuni-Mazaruni: Base of Meamu Mountains Range, 20 March 2007, Redden et al. 5713 (NY); Eboropu Mountain, 13 April 1979, Edwards 1268 (K); Headwaters of Kangu River, 5 March 1987, Pipoly et al. 11004 (NY); Essequibo River, 18 August 1929, Sandwith 50 (K); Pakaraima Mountains, 15 February 2004, Redden et al. 1886 (K, NY); Wareshema Mountain Range, 26 February 2007, Redden et al. 5360 (NY); Paruima, 6 July 1997, Clarke et al. 5427 (NY); Samwarakna-tipu, 9 November 1951, Maguire & Fanshawe 32489 (AMES); Upper Mazaruni, 27 February 1985, Renz 1491 (RENZ); 10 February 1985, Renz 1492 (RENZ); 6 February 1985, Renz 14090 (RENZ). Essequibo Islands-West Demerara: West Demerara, 15 April 1985, ter Steege & Cornelissenr 57 (U); White Creek, 19 April 1993, Henkel et al. 1941 (NY, U). Potaro-Siparuni: Ebini Mountain, 21 May 1991, Kelloff et al. 697 (K); Iwokrama Rainforest Reserve, 20 March 1997, Clarke et al. 4155 (U); 24 November 1995, Clarke & Hoffman 642 (NY). Upper Demerara-Berbice: Mabura region, 14 December 1993, Ek et al. 968 (U). Upper Takutu-Upper Essequibo: Acarai Mountains, 28 February 1994, Henkel et al. 4826 (NY, U); Maparri River, 3 June 1996, Clarke & McPherson 1888 (U); 6 June 1996, Clarke & McPherson 2020 (NY, U). SURINAME. Brokopongo: Bosreservaat Brownsberg, 5 July 1924, Boswezen 6614 (MBM, U). Marowijini: Moengo. 17 April 1955, Maguire & Maguire 40809 A (MO, NY). Saramacca: Between Saramacca River and Goliath Mountains, 4 June 1956, Schulz 7675 (U). Sipaliwini: Augustas Falls, 19 June 2001, Hawkins 1950 (MO); Nassau Mountains, 21 February 1949, Lanjouw, & Lindeman 2226 (AMES, U); Montibus Bakhuis, 24 February 1965, Florschütz & Maas 3001 (A, U); 16 March 1949, Lanjouw, & Lindeman 2754 (AMES, U); Plateau A, 1 January 1955, Maguire 39054 (NY); Plateau C, 26 January 2003, Jansen-Jacobs et al. 6283 (K, U); 30 January 2003, Jansen-Jacobs et al. 6420 (U); 1 March 1953, Maguire & Maguire 40731 (NY); Tapanahony, 3 March 1955, Maguire & Maguire 40750 (MO, NY). TRINIDAD AND TOBAGO. Trinidad: Tunapuna-Piarco. Blanchisseuse, 13 September 1994, Soo-Ping Chow 468 (BM). VENEZUELA. Bolívar: Raul Leoni, September 1986, Fernandez 3242 (VEN); Sierra de Imataca, 24 July 1989, Collella 1521 (NY).

Distribution:— Trinidad, French Guyana, Guiana, Suriname, Venezuela, northern Brazil: Amapá. TDWG code: 81 TRT-OO 82 FRG-OO GUY-OO SUR-OO VEN-OO 84 BZN-AP.

The only specimen found in Brazil (Geay s.n. at P) was labelled as French Guyana, Rivière Carnot, in the Contested French-Brazilian area, which was annexed to Amapá state in 1900. The first occurrence for Trinidad and Tobago is reported here (Chow 468, BM).

Nomenclatural notes:— Christenson (1996: 14) mistakenly cited the holotype of Cheiradenia cuspidata as Leprieur 108 deposited at K with an isotype at P. In the same way, he cited for C. imthurnii the specimen im Thurn 1966 with the holotype at K. This is here corrected to lectotype and isolectotype ( McNeill et al. 2012: art. 9.9).

Figures

FIGURE 3. Aganisia cyanea f. cyanea. A. Plant in situ. B. Cultivated specimen. C. Aganisia cyanea f. alba. D. Aganisia pulchella. E. Cheiradenia cuspidata. Paradisanthus bahiensis. F. Typical colour form. G. Southern colour form. A. Pessoa et al. 369 (INPA), by Edlley M. Pessoa. B – C. By AWZ Orchids. D. Cavalcanti et al. 713 (UFP). By D. Cavalcanti. E. By Rudolf Jenny. Available through Swiss Orchid Foundation at Herbarium Jeny Renz. F. By Alex Popovkin. G. van den Berg et al. 184 (ESA). By Cássio van den Berg.

FIGURE 4. Distribution of Cheiradenia (sole species C. cuspidata).

FIGURE 5. Cheiradenia cuspidata.A. Habit.B. Flower. C. Dissected perianth. Paradisanthus bahiensis. D. Habit. E. Flower. F. Dissected perianth, callus lobes laterally spread.A–B. Fernandez 3242 (VEN). C–F. Monteiro 314 (RB). By Maria Alice Rezende.