Jorge Brito hanging flower (Ceratostema jorgebritoi) and Siete Iglesias hanging flower (Ceratostema sieteiglesiana)

Jorge Brito hanging flower (Ceratostema jorgebritoi) dan Siete Iglesias hanging flower (Ceratostema sieteiglesiana)

NEWS - Ceratostema jorgebritoi has unique spirally arranged leaves and is the second species in the genus with tetrameric flowers. Ceratostema sieteiglesiana is distinguished by its spirally arranged leaves and distinctive five-winged hypanthium, further enhanced by conspicuous calyx branches. Both are new species.

Jorge Brito hanging flower (C. jorgebritoi) is similar to C. flexuosum (A.C. Sm.) J.F. Macbr., but has tetrameric flowers with oblong (vs. lanceolate) petal lobes, 5-9 acuminate (vs. 3-5 acuminate) and spirally arranged (vs. distichous).

Terminal inflorescence (vs. axillary), larger floral bracts (26.0×9.5 mm vs. 4.0-5.0×2.0 mm), longer hypanthium (3.4-10.1 mm vs. 3.0-4.0 mm), lanceolate-deltaic calyx lobes (vs. oblong) with a pointed apex (vs. acuminate) and narrow triangular corolla lobes (vs. lanceolate).

The species is found in Gualaquiza, Morona-Santiago, southeastern Ecuador. It grows in the eastern Andean foothills at elevations of 1600-1800 meters in primary forest and disturbed secondary areas. The researchers propose a conservation status of EN (Endangered). The name is dedicated to Jorge Brito-Molina, a biologist who has made significant contributions to terrestrial amphibians and micromammals.

Siete Iglesias hanging flower (C. sieteiglesiana) is similar to C. zamorana M.M.Jiménez & Vélez-abarca, but leaves are smaller (1.7-5.5×0.6-2.5 cm vs. 7.7-12.7×3.7-6.5 cm), inflorescences are short to very short-stalked (vs. long-stalked), flower parts are pubescent (vs. pruinose), flower stalks are shorter (1.92.7 cm vs. 2.2-4.1 cm) and subterete (vs. subquadrangular).

Bracteoles subulate (vs. ovate), calyx lobes longer (12.7-19.1 mm vs. 11.3-12.5 mm), sinus and apex pointed (vs. acuminate), corolla lobes longer (28-30 mm vs. 15-16 mm), outer black (vs. magenta) and filaments longer (9.5-13.1 mm vs. 4.5 mm).

C. sieteiglesiana is endemic to the forests around the city of San Juan Bosco, Morona-Santiago, Ecuador. The new species was found at 1500-1700 m elevation in a layered forest containing trees and saplings covered with moss. Conservation status EN (threatened). Named after the type location of this rare species, the Municipal Conservation ecological area Siete Iglesias.

Original research

Marco M. Jiménez, Gabriel A. Iturralde, J.R. Kuethe, Leisberth Vélez-Abarca & Henry X. Garzón-Suárez (2024). New species of Ceratostema (Ericaceae: Vaccinieae) from the southeast Andes of Ecuador-I. Phytotaxa 663 (3): 111-126, DOI:10.11646/phytotaxa.663.3.1

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