Monographs Details: Chomelia tenuiflora Benth.
Authority: Maguire, Bassett. 1967. The botany of the Guayana Highland--Part VII. Mem. New York Bot. Gard. 17: 1-439.
Family:Rubiaceae
Description:Distribution and Ecology - Suriname, British Guiana, and Venezuela. SURINAME. Near village of Jacob Kondre, Saramacca River headwaters, Maguire 23S46. BRITISH GUIANA. Basin of Rupununi River, near mouth of Charivais Creek, lat. about 2°35'N, A. C. Smith 2314: Robert Schomburgk 314 (type of C. tenuiflora), Tuma-tumari, Gleason 295. VENEZLELA. Amazonas: forest near Base River (Cano Negro), southeastern base of Cerro Duida, Steyermark 57923.

Discussion:

Type. Banks of stream and rivers, 1837, British Guiana, Robert Schomburgk 314.

The following note was published by Rusby (Bull. Torrey Club 52: 138. 1925) concerning the specimen of Gleason 295; “Chomelia, purpusii (Rusby) Brandeg., n. comb. (Anisomeris purpusii Brandegee, Univ. Calif. Publ. Bot. 6: 60. 1914). Gleason’s no. 295, from dense upland forest. Tumatumari, British Guiana is said by N. E. Brown to be near C. tenuiflora Benth.' to which species Standley refers it. Gleason’s plant is a Chomelia. with the corolla-appendages stout, brown and indurated and with the basal lobes of the anthers rather short, the anthers projecting beyond the mouth of the corolla." Anisomeris purpusii is a species described from Mexico, and Rusby s attempt to associate Gleason's collection with this species was ill-conceived and added confusion to the situation.

I have examined the type specimen of Schomburgk 314 (K). It has a corolla-tube 9-10 mm long and corolla-lobes 6 mm long by 0.8-1 mm wide. The corolla-tube length in this specimen is shorter than that of the Gleason 295 sheet, which measures 25-30 mm long. The Steyermark 57923 specimen from the base of Cerro Duida has corolla-tubes only 17-18 mm long, and is intermediate between the Gleason 295 and Schomburgk 314 sheets.

As contrasted with C. spinosa Jacq., with which it is sometimes confused, C. tenuiflora has the leaf-blade broadest at or above the middle instead of near the base, and the bracteoles are united at the base of the hypanthium or inflorescence instead of free and separate.

Distribution:Suriname South America| Guyana South America| Venezuela South America|