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Isertia haenkeana DC. Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical GardenSearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font

Published In: Prodromus Systematis Naturalis Regni Vegetabilis 4: 437–438. 1830. (Sept 1830) (Prodr.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 1/25/2011)
Acceptance : Accepted
Project Data     (Last Modified On 1/25/2011)

This species can be recognized by its deeply divided stipules, that often appear to be four free stipules; its rather robust habit; its showy terminal inflorescences with cymose axes; its good-sized tubular 6-lobed corollas that are yellow to red and densely bearded in the throat; and its drupaceous fruits, with each pyrene containing numerous seeds. Isertia haenkeana is common in secondary vegetation and apparently has a long flowering season, and is rather frequently collected. The flowers are diurnal and apparently pollinated by hummingbirds. Within Isertia, this species is particularly frequently confused with Palicourea; however Palicourea can be recognized by its usually 5-merous flowers that are not densely bearded in the throat and its fruits with a single seed in each pyrene.

Boom (1984) agreed with some previous authors in recognizing two varieties of Isertia haenkeana: var. haenkeana is found almost throughout the range of the species, while var. mirandensis is restricted to the Coastal Cordillera of northern Venezuela, a biogeographically rather distinctive region. Most specimens however are identified only as I. haenkeana in most databases, and the majority of floras use only the species name. These varieties seem rather distinct and may deserve re-evaluation with the additional specimens now available, as to their status (variety, subspecies, distinct species, or better all treated as one species). These varieties were separated by Boom (1984: p. 441) as detailed in the key below.

Distribution: Cuba and Guatemala through Colombia to northern Venezuela, generally in secondary vegetation, at 0-2300 m.


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Key to Varieties of Isertia haenkeana

1. Stipules 8-13 mm long; corolla tube strigulose to glabrate outside, the lobes usually with a tubercule at point of junction with the tube in bud; widespread in Central America, NW South America, and Cuba.......var. haenkeana

1'. Stipules 20-45 mm long; corolla tube hispid outside, the lobes without a tubercle at point of junction with the tube in bud; restricted to Cordillera de la Costa, Venezuela.......var. mirandensis



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