Monographs Details: Chelonanthus uliginosus (Griseb.) Gilg
Authority: Maguire, Bassett. 1989. The Botany of the Guayana Highland- Part XIII. Mem. New York Bot. Gard. XIII: 1-127.
Family:Gentianaceae
Description:Distribution and Ecology - G U Y A N A . Dense upland forest, Rockstone, 15 Jul- 1 Aug 1921, Gleason 800 (NY); Waramadong, Kamarang River, Mazamni region, Sep 1938-Feb 1939, Pinkus 287 (NY); sandy soil in Wallaba forest edge, 50 miles along Bartica-Potaro Rd., 25 Apr 1944, Maguire & Fanshawe 22977 (NY); Imbaimadai Savannas, 550 m elev.; flowers blue, 45-60 cm taU, 24 Oct 1951, Maguire 32236 (NY); infrequent in savanna, woodland vie, Chenowieng, Mt. Ayanganna, 500-1500 m alt., annual herb 8-10 d m high, flowers purple-blue, stems square, 7-8 Feb 1955, Maguire, Bagshaw & Maguire 40614 (NY); base of Utschi Falls, upper Mazamni River basin, ca. 640 m elev., 22 Oct 1960, Tillett & Tillett 45735 (NY). BRAZIL, terrttory of roraima: Upper slopes of Serra da Lua, 1200-1300 m elev., cloud forest; herb 1 m tall, corolla blue, 24 Jan 1969, Prance et al 9407 (NY upper slopes of Serra Parima, S of Auaris, 1400-1520 m alt., rock outcrop; herb 1 m tall, corolla bright blue, 10 Feb 1969, Prance et al 9809 (NY); plateau of northern massif of Serra Araca, south side of North Mountain,

Discussion:

Type. Not indicated

Chelonanthus uliginosus finds only an indifferent habital accommodation in Chelonanthus, and in pollen character is discordantly removed. Palynologically, although the tetrads do occur in loose aggregates, because of exine character the species cannot be associated with Irlbachia or Celiantha. W e hesitate to provide it with independent generic status, and would not do so at this writing. The species is thus here left dangling. Maas (1985) has placed it in Irlbachia under the new combination /. purpurascens, based on the latter name, and we cannot therefore comment on his decision for synonymy.

The following Guayanan specimens represent typical expression of the species. W e have not attempted an enumeration of extra-Guayanan plants. Ofthe two taxa cited by Nilsson (1970) as palynologically to be associated, Chelonanthus campanuloides is here referred to Irlbachia, and Chelonanthus spruceanus is unknown to us.

Specimens examined. VENEZUELA, territorio Wurdack & Adderiey 43554 (NY); Cordillera Parima amazonas: Dome on right side of Rio Siapa just below en la cumbre del Cerro Cayenama divisor fronterizo Raudal Gallineta, 130-900 m elev.; herb 0.5-1.5 m con Brasil, 1750 m alt., hierba en lajas graniticas Mar high, flowers blue-purple, scmb forest, 21 Jul 1959, 1971, Cardona 3073 (VEN) Bolivar- Along small stream in savanna ca. 4 km E of Santa Teresita de Kavanayen, weak herb to 1 m, flowers blue, infrequent, 1300 m elev., 23 Dec 1953, Maguire & Wurdack 34005 (NY); island on rapids of Rio Caroni just below Uriman, 393 m alt., 13 Jan 1955, Steyermark & Wurdack 68 (NY); Chimanta, rich rainforest on lower N W slopes of Abacapa-tepui, vie. of Camp along Rio Abacapa, 420 m ah., corolla rich purple, 30-31 Mar 1953, Steyermark 74767 (NY); between Bluff" Camp and promontary N of Bluflf Camp, along W-facing portion of Torono-tepui, 1600-1700 m alt., Steyermark 75676 (NY); vie. of Lower Falls of Rio Tirica on N W side of falls, 1000-1090 m alt, 6 Mar 1955, Steyermark & Wurdack 1270 (NY); Auyan-tepui, Angel Falls, 5 Apr 1950, Kunhardt 13 (NY); pequefia meseta del Norte de Serrania Caramban, SE of Canaima, 300-600 m ah., 19 Feb 1964, Agostini 394 (VEN); Cerro Piton, Cordillera Epicara, 400 m alt., Maguire, Steyermark & Maguire 53569 (NY); Mt. Roraima, river side at Arabupu, 4200 ft, flowers blue, 1 Jan 1928, Tate 210 (NY).