Monographs Details: Chelonanthus alatus (Aubl.) Pulle
Authority: Maguire, Bassett. 1989. The Botany of the Guayana Highland- Part XIII. Mem. New York Bot. Gard. XIII: 1-127.
Description:Distribution and Ecology - Mexico to Peru and Brazil. Widely distributed in Guayana with chief concentration in Edo. Bolivar at low or medium altitudes. Often weedy. GUYANA. Kamarang River Crossing, Kamarang Head, 2700 ft alt., herbaceous annual with white reflexed flowers 5-15 dm high, 5 Mar 1952, Maguire 33262 (NY); Mt. Ayanganna, Pakaraima Mts., occasional in savanna, woodland vie. Chenowieng, 550- 1500 m alt., annual 1 m high with square stems, flowers greenish-white, 7-8 Feb 1955, Maguire, Bagshaw & Maguire 40607 (NY).


Type. French Guiana. Aublet, B M .

Lisianthus alatus Aublet, Hist. Pl. Guiane 1: 204. t. 80. 1775.

Irlbachia alata (Aublet) Maas subsp. alata, Proc. Kon. Ned. Akad. Wetensch. Ser. C. 88(4): 408. 1985.

Specimens examined. VENEZUELA, territorio amazonas: Occasional along edge and tree islands of Esmeralda Savanna, Rio Orinoco, 150 m alt., flowers greenish-white, 23 Mar 1953, Maguire, Wurdack & Maguire 34629 (NY), bolivar: Sororopan-tepui, crest of cerro between E and W end, 2255 m alt., 14 Nov 1944, Steyermark 60118 (NY); Sororopan-tepui, cumbre, 1800 m alt., herb 1.5 m, flowers white, 17 Dec 1952, Maguire & Wurdack 33929 (NY); morichal 2 km S of Ciudad Piar, flowers white, stems 4-winged, infrequent, 18 Oct 195?>, Maguire, Wurdack & Bunting 35847 (NY); upper slopes Cerro Toribio, 450-500 m alt., flowers greenish-white, fmit green, stems 4-winged, infrequent, 22 Oct 1953, Maguire, Wurdack & Bunting 35924 (NY); savannas 2 k m S of Rio Chibau, righthand bank, 100 m alt., herb to 1 m high, stems square, somewhat winged, flowers white, 1 Sep 1962, Maguire, Steyermark & Maguire 53522 (NY); swampy savanna between lobes of Cerro Altamira (east of Cerro Bolivar), 400 m alt., herb 1.5 m, flowers white, 30 Apr 1955, Wurdack & Wright 411 (NY); cloud forest, summit of W-facing wooded escarpment, E of Miamo, Hato de Nuria, Altiplanicie de Nuria, 500-600 m alt., 16 Jan 1961, Steyermark 88556 (NY).