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Datasheet for Costus amazonicus subsp. krukovii

Plant Datasheet for Costus amazonicus subsp. krukovii

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Costus collected in Ecuador by Ray Baker, possibly C. amazonicus subsp. krukovii or a new species. - Click to see full sized image
Photo# 15065 Accession# R2262
Costus collected in Ecuador by Ray Baker, possibly C. amazonicus subsp. krukovii or a new species.


Costus collected in Ecuador by Ray Baker, possibly C. amazonicus subsp. krukovii or a new species. - Click to see full sized image
Photo# 15066 Accession# R2262
Costus collected in Ecuador by Ray Baker, possibly C. amazonicus subsp. krukovii or a new species.


Costus collected in Ecuador by Ray Baker, possibly C. amazonicus subsp. krukovii or a new species. - Click to see full sized image
Photo# 15067 Accession# R2262
Costus collected in Ecuador by Ray Baker, possibly C. amazonicus subsp. krukovii or a new species.


Costus collected in Ecuador by Ray Baker, possibly C. amazonicus subsp. krukovii or a new species. - Click to see full sized image
Photo# 15068 Accession# R2262
Costus collected in Ecuador by Ray Baker, possibly C. amazonicus subsp. krukovii or a new species.


Costus collected in Ecuador by Ray Baker, possibly C. amazonicus subsp. krukovii or a new species. - Click to see full sized image
Photo# 15069 Accession# R2262
Costus collected in Ecuador by Ray Baker, possibly C. amazonicus subsp. krukovii or a new species.


Costus collected in Ecuador by Ray Baker, possibly C. amazonicus subsp. krukovii or a new species. - Click to see full sized image
Photo# 15394 Accession# R2262
Costus collected in Ecuador by Ray Baker, possibly C. amazonicus subsp. krukovii or a new species.


Costus collected in Ecuador by Ray Baker, possibly C. amazonicus subsp. krukovii or a new species. - Click to see full sized image
Photo# 15395 Accession# R2262
Costus collected in Ecuador by Ray Baker, possibly C. amazonicus subsp. krukovii or a new species.



PLANT FAMILY: Costaceae
BOTANICAL NAME: Costus amazonicus subsp. krukovii
FORMAL SCIENTIFIC NAME: Costus amazonicus (Loes.) J.F.Macbr.
STATUS :Accepted
CONTINENT: Neotropical
SYNONYMS:


BOTANICAL NOTES:
This subspecies differs from subsp. amazonicus in having bract margins entire (not fibrous) and corolla lobes glabrous. The indument on the ligules and leaves is variable from glabrous to densely villose. The type is from the state of Amazonas in Brazil. I have not seen any verified plants or photos of this subspecies.

Costus sp. in collection at Smithsonian Greenhouse #94-679, plant acquired from Lyon Arboretum, Hawaii. Note: two plants in greenhouse with same acession number, both photographed, one specimen has exceptionally wide sheaths that feel spongy-hollow when squeezed. Dr. Maas responded that this is probably Costus amazonicus (Loes.) J.F. Macbr. var krukovii Maas.

Specimen at Lyon #82-1252 - Collected in Ecuador, 33 km south of Rio Aguarico on Coca-Lago Agrio Road at elevation of 350 m. K. Nagata #2824. Ray Baker collected. "Stems 70-80 cm tall, red, 2 cm diameter at base, leafy only at apex. Leaaf blades broadly obovate, the veins prominent, sheaths inflated on stem. Infl. separate from leafy stems, on red peduncles 25 cm ht., ovoid, 10 cm long, 5 cm diameter, bracts green. Corolla white, 6.5 cm long, staminodes yellowish with oragne at apex, the lip yellow. Photos 2661 and 2663. Also at Waimea as #82P806 obtained from Lyon.

Costus amazonicus (Loes.) J.F. Macbr.: subsp. krukovii Maas - Isotype: 1934 Krukoff, Brazil, Amazonas, Humaita. Basin of Rio Madeira Municipality Humayata, on plateau between Rio Livramento and Rio Ipixuna. 7.51 S, 63.02 W. Other specimens det by Maas at Herbario do Jardim Botanico do Rio de Janeiro. Prance No. 3445, Nov. 1966, Road Humaita to Porto Velho, km 10. Low forest on terra firme. 1.5 m tall, corolla yellow with red streaks. Both these specimens show inflorescence on a separate basal leafless shoot.

From: "Specht, Chelsea" - The collection you mention of Ray's and Helen's in Ecuador (SEE NOTES UNDER PID#7119 - Costus unknown at Smithsonian #SM1994-679) is currently identified as Costus amazonicus subsp. krukovii. Its strange, because I honesly think it looks like something different and new. But if you look at Maas' dets of this subsp. for his revision, the plant matches when dried and dead and flat. The issue then becomes to compare the plants when alive. I've never seen Costus amazonicus subsp. krukovii alive, and I'm not sure that anyone has. If the plant that Ray and Helen collected is indeed what is on all those herbarium sheets with dets as C. amazonicus subsp krukovii, then the plant - now observed living - is certainly not a subspecies of amazonicus and will become Costus krukovii. Until I talked to the Maas', I was convinced it was a new species and was all ready to name it after ray. Unfortunately, there was already a Costus bakerii so that wouldn’t have worked. I was getting pretty used to the idea of Costus raybakerii, but now its either a strange form of amazonicus or a species named krukovii. Ah well.

ACCESSION NOTES:
R2262 - Smithsonian USBRG 1994-679, did not survive here.

R2654 - Received cuttings from Smithsonian specimen #1998-276 in April 2002, did not survive, possible subsp. krukovii.


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