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Gingersrus Database Taxon ID 4325

Dimerocostus rurrenabaqueanus


OLD NAME: Dimerocostus strobilaceus subsp. gutierrezii

NEW NAME: Dimerocostus rurrenabaqueanus

NAME CHANGE NOTES: Split out as a separate species from D. strobilaceus. Name changed due to error in interpretation of Dimerocostus gutierrezii, determined type specimen to really be D. argenteus.

FULL SCIENTIFIC NAME: Dimerocostus rurrenabaqueanus (Kuntze) Maas & H.Maas

STATUS : stat. nov.

CONTINENT: Neotropical

FIELD OBSERVATIONS:(If field observations are available, you can click on the link to open in a new window.)
FIELD OBSERVATIONS

PHOTOS:(If photos are available, you can click on the link to open in a new window.)
GOOGLE PHOTO ALBUM

SYNONYMS:
- Dimerocostus tessmannii Loes. (1929) - Dimerocostus williamsii J.F.Macbr. (1931)

BOTANICAL NOTES:
Proposed for publication in 2022, this former subspecies of D. strobilaceus will become a separate species and the name D. rurrenabaqueanus will be applied in lieu of D. gutierrezii, due to misinterpretation of that type specimen.In his 1972 monograph Paul Maas described three subspecies of the species Dimerocostus strobilaceus. One of these was subspecies gutierrezii which was based upon an 1892 collection in southern Bolivia on the Rio Yapacaní by Otto Kuntze. The holotype at NY is in poor condition and contains only an inflorescence, lacking leaves or stems that might be used to further identify the taxon. On the tag at the NYBG herbarium there is a note interpreting the locality of the collection as the town of Puerto Gutiérrez at 17° 11' S, 63° 57' W. The explanation of the locality as given in 1898 by Kuntze himself is (translated from the German): "Bolivia: common on the Rio Yapacani, especially at the 'Puerto', the shipping point, which is used by Dr. Guttierez in San Ignazio and to which he had an 8 leagues long path, 5 of which were made through primeval forest." The Kuntze description in Rivisio Generum Planterum III.III, pg 301-302 is as basic as the specimen and gives no information whatsoever about the flowers.

In March of 2017 I traveled to that region to look for the living plants to see what Kuntze' Dimerocostus gutierrezii might look like in vivo. What I found was all consistent in form to Dimerocostus argenteus, throughout the region on both sides of the Rio Yapicaní, from a small reserve south of Buena Vista to the La Chonta sector of the Amboro National Park. This form has leaves with silvery undersides and a hooded pale yellow flower - with no morphological basis to describe the Kuntze plant as a separate species. When I later explained what I had found and showed my photos to Paul Maas, he agreed that the plants growing there are examples of D. argenteus, and that the Kuntze type specimen had been misinterpreted. He decided to use the next oldest name for the form he had been calling D. strobilaceus subsp. gutierrezii, and chose Dimerocostus rurrenabaquianus as the substitute. See that page at http://www.gingersrus.com/DataSheet.php?PID=6148 for details.

HORTICULTURAL NOTES:
Based on information at the Botanic Gardens Conservation International (BGCI) this species is in ex situ cultivation at 10 botanical gardens world wide. I have found this species to be relatively easy to grow in my garden and greenhouses at Le Jardín Ombrage.

ACCESSIONS:Click links (if any) to see details of individual collections. R2272- R2853- R3261- R3262- R3337- R3552-


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Photos (if available) of Taxon ID 4325
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Dimerocostus rurrenabaqueanus, photo from Maas, Jana DSC08486a - Click to see full sized image
Photo# 372 Accession# R0
Dimerocostus rurrenabaqueanus, photo from Maas, Jana DSC08486a


Dimerocostus rurrenabaqueanus, photo by Skinner at Waimea Arboretum and Botanical Garden, Hawaii - Click to see full sized image
Photo# 373 Accession# R0
Dimerocostus rurrenabaqueanus, photo by Skinner at Waimea Arboretum and Botanical Garden, Hawaii


Dimerocostus rurrenabaqueanus, Skinner R3261, from Manu Learning Centre, Madre de Dios, Peru - Click to see full sized image
Photo# 370 Accession# R3261
Dimerocostus rurrenabaqueanus, Skinner R3261, from Manu Learning Centre, Madre de Dios, Peru


Dimerocostus rurrenabaqueanus, Skinner R3261, from Manu Learning Centre, Madre de Dios, Peru - Click to see full sized image
Photo# 371 Accession# R3261
Dimerocostus rurrenabaqueanus, Skinner R3261, from Manu Learning Centre, Madre de Dios, Peru