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Datasheet for Costus productus

Plant Datasheet for Costus productus

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Costus productus at Atlanta Botanic Garden, Atlanta, GA No tag on plant, identification uncertain. - Click to see full sized image
Photo# 11465 Accession# R0
Costus productus at Atlanta Botanic Garden, Atlanta, GA No tag on plant, identification uncertain.


Costus productus by Kathleen Kay, Michigan State University In horticulture as Costus curvibracteatus - - Click to see full sized image
Photo# 11466 Accession# R0
Costus productus by Kathleen Kay, Michigan State University In horticulture as Costus curvibracteatus -


Costus productus at Como Park Conservatory, St. Paul, MN  - Click to see full sized image
Photo# 11467 Accession# R0
Costus productus at Como Park Conservatory, St. Paul, MN


Costus productus at Como Park Conservatory, St. Paul, MN Note long lobed ligule. - Click to see full sized image
Photo# 11468 Accession# R0
Costus productus at Como Park Conservatory, St. Paul, MN Note long lobed ligule.


Costus productus at Como Park Conservatory, St. Paul, MN  - Click to see full sized image
Photo# 11469 Accession# R0
Costus productus at Como Park Conservatory, St. Paul, MN


Costus productus at Selby Botanical Gardens, Sarasota, FL  - Click to see full sized image
Photo# 11470 Accession# R0
Costus productus at Selby Botanical Gardens, Sarasota, FL


Costus productus at Selby Botanical Gardens, Sarasota, FL  - Click to see full sized image
Photo# 11471 Accession# R0
Costus productus at Selby Botanical Gardens, Sarasota, FL


Costus productus at Lyon Arboretum, Oahu, Hawaii  - Click to see full sized image
Photo# 12724 Accession# R0
Costus productus at Lyon Arboretum, Oahu, Hawaii


Costus aff. productus at Lyon Arboretum, Oahu, Hawaii  - Click to see full sized image
Photo# 12725 Accession# R0
Costus aff. productus at Lyon Arboretum, Oahu, Hawaii


Costus aff. productus at Lyon Arboretum, Oahu, Hawaii  - Click to see full sized image
Photo# 12726 Accession# R0
Costus aff. productus at Lyon Arboretum, Oahu, Hawaii


Costus aff. productus at Lyon Arboretum, Oahu, Hawaii  - Click to see full sized image
Photo# 12727 Accession# R0
Costus aff. productus at Lyon Arboretum, Oahu, Hawaii


Costus aff. productus at Lyon Arboretum, Oahu, Hawaii  - Click to see full sized image
Photo# 12728 Accession# R0
Costus aff. productus at Lyon Arboretum, Oahu, Hawaii


Costus productus  - note bract margins curved INWARDS.  Plant tagged as Costus curvibracteatus - Click to see full sized image
Photo# 11439 Accession# R2693
Costus productus - note bract margins curved INWARDS. Plant tagged as Costus curvibracteatus


Costus productus  - bracts.  Plant tagged as Costus curvibracteatus - Click to see full sized image
Photo# 11440 Accession# R2693
Costus productus - bracts. Plant tagged as Costus curvibracteatus


Costus productus - bracts.  Plant tagged as Costus curvibracteatus - Click to see full sized image
Photo# 11441 Accession# R2693
Costus productus - bracts. Plant tagged as Costus curvibracteatus


Costus productus - calyx and bracteole.  Plant tagged as Costus curvibracteatus - Click to see full sized image
Photo# 11442 Accession# R2693
Costus productus - calyx and bracteole. Plant tagged as Costus curvibracteatus


Costus productus  - calyx and bracteole.  Plant tagged as Costus curvibracteatus - Click to see full sized image
Photo# 11443 Accession# R2693
Costus productus - calyx and bracteole. Plant tagged as Costus curvibracteatus


Costus productus  - corolla lobes.  Plant tagged as Costus curvibracteatus - Click to see full sized image
Photo# 11444 Accession# R2693
Costus productus - corolla lobes. Plant tagged as Costus curvibracteatus


Costus productus - corolla lobes.  Plant tagged as Costus curvibracteatus - Click to see full sized image
Photo# 11445 Accession# R2693
Costus productus - corolla lobes. Plant tagged as Costus curvibracteatus


Costus productus  - flower.  Plant tagged as Costus curvibracteatus - Click to see full sized image
Photo# 11446 Accession# R2693
Costus productus - flower. Plant tagged as Costus curvibracteatus


Costus productus  - note hairs on leaves, adaxial side.  Plant tagged as Costus curvibracteatus - Click to see full sized image
Photo# 11447 Accession# R2693
Costus productus - note hairs on leaves, adaxial side. Plant tagged as Costus curvibracteatus


Costus productus  - entire inflorescence.  Plant tagged as Costus curvibracteatuse - Click to see full sized image
Photo# 11448 Accession# R2693
Costus productus - entire inflorescence. Plant tagged as Costus curvibracteatuse


Costus productus - inflorescence.  Plant tagged as Costus curvibracteatus - Click to see full sized image
Photo# 11449 Accession# R2693
Costus productus - inflorescence. Plant tagged as Costus curvibracteatus


Costus productus  - labellum.  Plant tagged as Costus curvibracteatus - Click to see full sized image
Photo# 11450 Accession# R2693
Costus productus - labellum. Plant tagged as Costus curvibracteatus


Costus productus  - labellum.  Plant tagged as Costus curvibracteatus - Click to see full sized image
Photo# 11451 Accession# R2693
Costus productus - labellum. Plant tagged as Costus curvibracteatus


Costus productus  - labellum.  Plant tagged as Costus curvibracteatus - Click to see full sized image
Photo# 11452 Accession# R2693
Costus productus - labellum. Plant tagged as Costus curvibracteatus


Costus productus  - leaf apex. Plant tagged as Costus curvibracteatus - Click to see full sized image
Photo# 11453 Accession# R2693
Costus productus - leaf apex. Plant tagged as Costus curvibracteatus


Costus productus  - leaves.  Plant tagged as Costus curvibracteatus - Click to see full sized image
Photo# 11454 Accession# R2693
Costus productus - leaves. Plant tagged as Costus curvibracteatus


Costus productus  stamen - Click to see full sized image
Photo# 11455 Accession# R2693
Costus productus stamen


Costus productus  stamen - Click to see full sized image
Photo# 11456 Accession# R2693
Costus productus stamen


Costus productus  Plant tagged as Costus curvibracteatus - Click to see full sized image
Photo# 11457 Accession# R2693
Costus productus Plant tagged as Costus curvibracteatus


Costus productus  Plant tagged as Costus curvibracteatus - Click to see full sized image
Photo# 11458 Accession# R2693
Costus productus Plant tagged as Costus curvibracteatus


Costus productus  Plant tagged as Costus curvibracteatus - Click to see full sized image
Photo# 11459 Accession# R2693
Costus productus Plant tagged as Costus curvibracteatus


Costus productus  Plant tagged as Costus curvibracteatus - Click to see full sized image
Photo# 11460 Accession# R2693
Costus productus Plant tagged as Costus curvibracteatus


Costus productus  ligule - Plant tagged as Costus curvibracteatus - Click to see full sized image
Photo# 11461 Accession# R2693
Costus productus ligule - Plant tagged as Costus curvibracteatus


Costus productus - Click to see full sized image
Photo# 11462 Accession# R2693
Costus productus


Costus productus - Click to see full sized image
Photo# 11463 Accession# R2693
Costus productus


Costus productus - Click to see full sized image
Photo# 11464 Accession# R2693
Costus productus


Costus productus   stigma - Click to see full sized image
Photo# 12429 Accession# R2693
Costus productus stigma


Costus productus   stigma - Click to see full sized image
Photo# 12430 Accession# R2693
Costus productus stigma


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 #R2693 . (opens in new window).
BUY THIS PLANT from Gingers R Us (opens in new window).

PLANT FAMILY: Costaceae
BOTANICAL NAME: Costus productus
FORMAL SCIENTIFIC NAME: Costus productus Gleason ex Maas
STATUS :Accepted
CONTINENT: Neotropical
SYNONYMS:


BOTANICAL NOTES:
This is an accepted neo-tropical Costus species described by Paul Maas under the species name Costus juruanus in his 1972 monograph, then the name C. juruanus was moved into synonymy with Costus productus in his 1977 monograph. This species name and description is attributed to botanist Henry A. Gleason (1882–1975) who was also the author of Costus bracteatus, and the type specimen was det'd as C. productus Gleason in 1931, then changed by Maas in 1968 to C. juruanus and then changed back to C. productus by Maas in 1976. Maas in 1977 states that he was excluding C. juruanus from C. productus as an insufficiently known species.

The species is described as a low plant between 0.3 and 1.5 meters tall, with a long (20-40 mm) two-lobed ligule. The inflorescence (normally terminal) is comprised of red appendaged bracts and tubular red to orange-red flowers. Maas says C. productus is characterized by its red bract appendages, a very long, fragile ligule and a relatively long callus of the bracts.

Maas describes two varieties of C. productus - var. productus and var. strigosus, in another example of describing varieties based on the indument. Var. productus has leaves glabrous to sparsely puberulous and var. strigosus has leaves rather densely strigose. I have not seen enough examples of these plants in the wild to have a good grasp of the two varieties, so for now on this website I have included all specimens and photos on this page or on a page pertaining to a named cultivar that is attributed to this species. In US horticulture, this plant has many forms such as 'Maroon Chalice', 'Emerald Chalice' and various plants referred to in error as "Costus curvibracteatus".

Maas gives the distribution as eastern Peru for var. productus - with var. strigosus only listed in its type locality of Colombia, Putumayo, Rio Putumayo near La Loma, Puerto Ospina at 230-250 meters. GBIF records do not reflect any other records for var. strigosus and nearly all (except one Brazilian collection) as eastern Peru, centered around its type locality in Dept. Junin. I did see Costus productus in the lobby of a small hotel in Tarapoto, Dept. San Martin, Peru (a known locality for this species) and I am guessing that plant was locally collected.

The plant that I received from a nursery in Florida, is typical of the plant I have seen in horticulture that is often sold and incorrectly identified as Costus curvibracteatus. It is actually Costus productus. There are several major differences between this plant and the description in Maas. His description has the sheaths, ligules, petioles and most importantly the UNDERSIDES of the leaves as being densely hirsute to strigose, and this character is included as part of his identification key. However, in the plant sold in US horticulture by this name the sheath is glabrous, as are the ligules (save a few sericious hairs), the petioles, and undersides of the leaves. The UPPER sides of the leaves of this specimen are minutely puberulous, but the undersides are glabrous. The other difference from Maas' description is the curvature of the very distinctive bracts, described in Maas as being curved outwards at the apex, but very definitely curved INWARDS in this specimen.

After review by Chelsea Specht and Dr. Maas, I have determined that the plant common in the hort. trade under the name "curvibracteatus" is actually Costus productus. To see a description of the true species Costus curvibracteatus, go toPID #4317.

ACCESSION NOTES:
R1945, R1947, and R2693 were received from nurseries or in trade and are the common form that is often incorrectly tagged as C. curvibracteatus. I am guessing that this cultivated plant is the Peruvian collection by Tim Plowman, #11560 collected 1981 in Peru, dept San Martin, Mariscal Caceres at 530 meters. It has circulated around a number of botanical gardens in Hawaii and elsewhere. R2693 has been vouchered at the UC Berkeley, Jepsen Herbarium, UC2045802.R3185 has yet to flower and be identified for certain.

GINGERSRUS CATALOG LISTING:
Costus productos flower This is the plant that is sometimes sold in the US under the name Costus curvibracteatus, but it has been incorrectly identified years ago and the error has persisted. Costus productus in native to the eastern foothills of the Andes in Peru. Costus curvibracteatus is an entirely different plant that grows in the mountains of Costa Rica and Panama. They may be superficially similar, but botanically they are entirely different.

This Costus has the typical spiral foliage in a medium green color and the inflorescence is terminal at the end of a mature sheath. The color of the bracts is bright red-orange (some other forms sold are red) and the flowers peek out one by one from between the bracts in a bright buttery yellow color.

I have seen the hardiness of this plant rated anywhere from zone 10 to zone 9 to zone 8B, so it is hard to say for sure. I have found it to be marginally hardy here in Tallahassee (USDA zone 8B). I left it outdoors in the ground over winter for a couple of years and it came back strong and was blooming by late July. Many Costus plants are lost by gardeners (myself included) if the rhizomes are kept too wet when not in active growth. Most sources indicate this Costus prefers shady conditions, and I have tested it in filtered shade and up to about 3 hours of direct sun.

Costus productus is easy to start from cuttings and it can bloom the first year from cuttings. It has a very long bloom period and can make a showy garden plant with its colorful bracts and flowers. The patch pictured below started blooming in late June and bloomed through the summer.


Costus productus in the garden

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