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Datasheet for Costus glaucus

Plant Datasheet for Costus glaucus

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Costus glaucus on trail near Rancho Quemado, Osa Peninsula, Costa Rica In natural habitat, - Click to see full sized image
Photo# 10791 Accession# R0
Costus glaucus on trail near Rancho Quemado, Osa Peninsula, Costa Rica In natural habitat,


Costus glaucus on trail near Rancho Quemado, Osa Peninsula, Costa Rica In natural habitat, - Click to see full sized image
Photo# 10792 Accession# R0
Costus glaucus on trail near Rancho Quemado, Osa Peninsula, Costa Rica In natural habitat,


Costus glaucus on trail near Rancho Quemado, Osa Peninsula, Costa Rica In natural habitat, - Click to see full sized image
Photo# 10793 Accession# R0
Costus glaucus on trail near Rancho Quemado, Osa Peninsula, Costa Rica In natural habitat,


Costus glaucus on trail near Rancho Quemado, Osa Peninsula, Costa Rica In natural habitat, - Click to see full sized image
Photo# 10794 Accession# R0
Costus glaucus on trail near Rancho Quemado, Osa Peninsula, Costa Rica In natural habitat,


Costus glaucus on trail near Rancho Quemado, Osa Peninsula, Costa Rica In natural habitat, - Click to see full sized image
Photo# 10795 Accession# R0
Costus glaucus on trail near Rancho Quemado, Osa Peninsula, Costa Rica In natural habitat,


Costus glaucus at Fairchild Tropical Gardens, Miami, Florida  - Click to see full sized image
Photo# 10796 Accession# R0
Costus glaucus at Fairchild Tropical Gardens, Miami, Florida


Costus glaucus at Fairchild Tropical Gardens, Miami, Florida ligule - Click to see full sized image
Photo# 10797 Accession# R0
Costus glaucus at Fairchild Tropical Gardens, Miami, Florida ligule


Costus glaucus at Fairchild Tropical Gardens, Miami, Florida  - Click to see full sized image
Photo# 10798 Accession# R0
Costus glaucus at Fairchild Tropical Gardens, Miami, Florida


Costus glaucus at La Gamba Biological Research Station, Costa Rica flower - Click to see full sized image
Photo# 10799 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica flower


Costus glaucus at La Gamba Biological Research Station, Costa Rica flower - Click to see full sized image
Photo# 10800 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica flower


Costus glaucus at La Gamba Biological Research Station, Costa Rica flower - Click to see full sized image
Photo# 10801 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica flower


Costus glaucus at La Gamba Biological Research Station, Costa Rica flower - Click to see full sized image
Photo# 10802 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica flower


Costus glaucus at La Gamba Biological Research Station, Costa Rica flower - Click to see full sized image
Photo# 10803 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica flower


Costus glaucus at La Gamba Biological Research Station, Costa Rica flower - Click to see full sized image
Photo# 10804 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica flower


Costus glaucus at La Gamba Biological Research Station, Costa Rica flower - Click to see full sized image
Photo# 10805 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica flower


Costus glaucus at La Gamba Biological Research Station, Costa Rica ligule - Click to see full sized image
Photo# 10806 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica ligule


Costus glaucus at La Gamba Biological Research Station, Costa Rica glaucus new shoot - Click to see full sized image
Photo# 10807 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica glaucus new shoot


Costus glaucus at La Gamba Biological Research Station, Costa Rica corolla lobe - Click to see full sized image
Photo# 10808 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica corolla lobe


Costus glaucus at La Gamba Biological Research Station, Costa Rica labellum - Click to see full sized image
Photo# 10809 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica labellum


Costus glaucus at La Gamba Biological Research Station, Costa Rica labellum - Click to see full sized image
Photo# 10810 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica labellum


Costus glaucus at La Gamba Biological Research Station, Costa Rica labellum and stamen - Click to see full sized image
Photo# 10811 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica labellum and stamen


Costus glaucus at La Gamba Biological Research Station, Costa Rica stamen - Click to see full sized image
Photo# 10812 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica stamen


Costus glaucus at La Gamba Biological Research Station, Costa Rica stamen - Click to see full sized image
Photo# 10813 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica stamen


Costus glaucus at La Gamba Biological Research Station, Costa Rica inflorescense - Click to see full sized image
Photo# 10814 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica inflorescense


Costus glaucus at La Gamba Biological Research Station, Costa Rica ligule - Click to see full sized image
Photo# 10815 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica ligule


Costus glaucus at La Gamba Biological Research Station, Costa Rica over 20 feet tall! - Click to see full sized image
Photo# 10816 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica over 20 feet tall!


Costus glaucus at La Gamba Biological Research Station, Costa Rica leaves - Click to see full sized image
Photo# 10817 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica leaves


Costus glaucus at La Gamba Biological Research Station, Costa Rica inflorescense - Click to see full sized image
Photo# 10818 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica inflorescense


Costus glaucus at La Gamba Biological Research Station, Costa Rica bracts - Click to see full sized image
Photo# 10819 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica bracts


Costus glaucus at La Gamba Biological Research Station, Costa Rica bracts - Click to see full sized image
Photo# 10820 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica bracts


Costus glaucus at La Gamba Biological Research Station, Costa Rica bracteole and calyx - Click to see full sized image
Photo# 10821 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica bracteole and calyx


Costus glaucus at La Gamba Biological Research Station, Costa Rica bracteole - Click to see full sized image
Photo# 10822 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica bracteole


Costus glaucus at La Gamba Biological Research Station, Costa Rica bracteole - Click to see full sized image
Photo# 10823 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica bracteole


Costus glaucus at La Gamba Biological Research Station, Costa Rica calyx - Click to see full sized image
Photo# 10824 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica calyx


Costus glaucus at La Gamba Biological Research Station, Costa Rica calyx - Click to see full sized image
Photo# 10825 Accession# R0
Costus glaucus at La Gamba Biological Research Station, Costa Rica calyx


Costus glaucus  at Alto Concepcion, Costa Rica glaucus new shoot and stem (has powdery white substance that rubs off) - Click to see full sized image
Photo# 12358 Accession# R0
Costus glaucus at Alto Concepcion, Costa Rica glaucus new shoot and stem (has powdery white substance that rubs off)


Costus glaucus  at Cerro Nara, Costa Rica bract, bracteole and calyx - Click to see full sized image
Photo# 12359 Accession# R0
Costus glaucus at Cerro Nara, Costa Rica bract, bracteole and calyx


Costus glaucus  at Cerro Nara, Costa Rica corolla lobes - Click to see full sized image
Photo# 12360 Accession# R0
Costus glaucus at Cerro Nara, Costa Rica corolla lobes


Costus glaucus  at Cerro Nara, Costa Rica corolla lobes - Click to see full sized image
Photo# 12361 Accession# R0
Costus glaucus at Cerro Nara, Costa Rica corolla lobes


Costus glaucus  at Cerro Nara, Costa Rica flower - Click to see full sized image
Photo# 12362 Accession# R0
Costus glaucus at Cerro Nara, Costa Rica flower


Costus glaucus  at Cerro Nara, Costa Rica labellum - Click to see full sized image
Photo# 12363 Accession# R0
Costus glaucus at Cerro Nara, Costa Rica labellum


Costus glaucus  at Cerro Nara, Costa Rica inflo. of plant in front of Cerro Nara Lodge - Click to see full sized image
Photo# 12364 Accession# R0
Costus glaucus at Cerro Nara, Costa Rica inflo. of plant in front of Cerro Nara Lodge


Costus glaucus  at Cerro Nara, Costa Rica flower - Click to see full sized image
Photo# 12365 Accession# R0
Costus glaucus at Cerro Nara, Costa Rica flower


Costus glaucus  at PN Manuel Antonio, Costa Rica ligule - Click to see full sized image
Photo# 12366 Accession# R0
Costus glaucus at PN Manuel Antonio, Costa Rica ligule


Costus glaucus  at Quebrada Grande, La Cangreja, Costa Rica ligule - Click to see full sized image
Photo# 12367 Accession# R0
Costus glaucus at Quebrada Grande, La Cangreja, Costa Rica ligule


Costus glaucus  at Quebrada Grande, La Cangreja, Costa Rica old inflo. (same plant as seen on Island in May without flowers) - Click to see full sized image
Photo# 12368 Accession# R0
Costus glaucus at Quebrada Grande, La Cangreja, Costa Rica old inflo. (same plant as seen on Island in May without flowers)


Costus glaucus at Dave Skinner at Waimea Audubon Center, Oahu, Hawaii  Audubon Center, Oahu, Hawaii  #86P447  - Click to see full sized image
Photo# 12668 Accession# R0
Costus glaucus at Dave Skinner at Waimea Audubon Center, Oahu, Hawaii Audubon Center, Oahu, Hawaii #86P447


Costus glaucus at Rafiki, near Quepos, Costa Rica - showing powdery white covering - Click to see full sized image
Photo# 17979 Accession# R0
Costus glaucus at Rafiki, near Quepos, Costa Rica - showing powdery white covering


Costus glaucus at Rafiki, near Quepos, Costa Rica - ligule - Click to see full sized image
Photo# 17980 Accession# R0
Costus glaucus at Rafiki, near Quepos, Costa Rica - ligule


Costus glaucus at CATIE type locality. - Click to see full sized image
Photo# 18025 Accession# R3363
Costus glaucus at CATIE type locality.


Costus glaucus at CATIE type locality. - Click to see full sized image
Photo# 18026 Accession# R3363
Costus glaucus at CATIE type locality.


Costus glaucus at CATIE type locality - new shoot - Click to see full sized image
Photo# 18027 Accession# R3363
Costus glaucus at CATIE type locality - new shoot


Costus glaucus at CATIE type locality - ligules - Click to see full sized image
Photo# 18028 Accession# R3363
Costus glaucus at CATIE type locality - ligules


CLICK HERE for a detailed botanical description and identification key for this species (opens in new window).
CLICK HERE to see a description of accession #R3271 . (opens in new window).
CLICK HERE to see a description of accession #R3270 . (opens in new window).
CLICK HERE to see a description of accession #R3269 . (opens in new window).
BUY THIS PLANT from Gingers R Us (opens in new window).

PLANT FAMILY: Costaceae
BOTANICAL NAME: Costus glaucus
FORMAL SCIENTIFIC NAME: Costus glaucus Maas
STATUS :Accepted
CONTINENT: Neotropical
SYNONYMS:


BOTANICAL NOTES:
This is an accepted neo-tropical Costus species described by Paul Maas in 1976. As he describes it, this plant can grow quite tall, up to 4 meters. The young plants are completely glaucus (white powdery covering) but older plants not so much. The ligules are long and bi-lobed. It is terminal flowering with light green and glaucus non-appendaged bracts on the exposed part, pinkish underneath. The flowers are rather distinctive, with red and yellow colors. The corolla is yellow but sometimes with an unusual red center. The labellum is mostly red striped with yellow and a yellow throat.

Holotype: collected in 1974 by Paul Maas at Cartago, Turrialba, Rio Reventazón at 600 m.

I have seen this species several places in Costa Rica, with a wide range but not common, usually below 500 m, Golfo Dulce area, Cerro Nara, La Cangreja
At La Gamba Research Station - cultivated in garden, over 20 feet tall, inflo very large, over 12 inches. flower parts photographed July 2, 2005.
Several specimens observed between Drake and Rincon on Osa Peninsula.
Along Quebrada Grande in La Cangreja
In Cerro Nara area at higher altitudes (ca 900 m), local specimen planted in front of Cerro Nara Lodge

In 2014 I completed an IUCN Red List assessment for this species and it is now classified as Near Threatened. My assessment rationale can be found at http://www.iucnredlist.org/details/full/56345900/0.

I can usually recognize it by the white powdery substance on the newly emerging stems and sometimes also on mature stems and bracts. It is a very large plant in stature and the ligules are long and deeply lobed. The inflorescence is usually round at the apex except in very old plants where it is more elongated. I have seen two plants that look to be very close to C. glaucus and have them described and photos on separate pages atPID 7566 (now called Costus 'Red Baron') andPID 7525 (Costus from Tulipe) .

Specimen at Waimea 86P447 (had as Costus sp.) - received 1986 from Rob Montgomery, Costa Rica. Collected 14 km NE of Palmar.

In July 2016 I went to the type locality at the organization CATIE near Turrialba in Cartago Province, Costa Rica. Costus glaucus was found there, both in habitat and in the botanical garden there.

ACCESSION NOTES:
R2951 was received from Tom Wood, origin unknown. This collection has been vouchered at the UC Berkeley, Jepsen Herbarium, UC2045816.R3363 and R3364 - seeds and stem cutting collected at CATIE type locality, germinated and growing well as of January 2017.

OBSERVATION NOTES:

CATIE, Turrialba, Cartago, Costa Rica, Latitude 9.905270154, Longitude -83.76970723, at meters elevation.

Cerro Nara, Londres, Santa María, Costa Rica, Latitude 9.449427787, Longitude -84.16521999, at 800 meters elevation.

Trail near Rancho Quemado, Osa Peninsula, Costa Rica, Latitude 8.668424387, Longitude -83.50529271, at 400 meters elevation.

Rafiki, San José Province, Pérez Zeledón, Costa Rica, Latitude 9.509429684, Longitude -83.90862117, at 168 meters elevation.

GINGERSRUS CATALOG LISTING:
Costus glaucus is named for the whitish "glaucus" covering on the new shoots, bracts (usually) and other vegetative parts, but it is not the only Costus that ever has that appearance. It is closest to Costus laevis and I have sometimes gotten them confused in the wild. What distinguishes C. glaucus besides the glaucus is the longer lobed ligules, over 15 mm and up to 55 mm. It is also usually much taller, up to 20 feet tall and with straighter stems.

It has large leaves and a colorful flower against the green bracts. I have usually found it growing in sunny areas and it should do well in full to part sun. I have not tested this for hardiness and assume it would only be hardy in frost free areas.



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