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Costus Species Botanical Description Botanical Description page for GingersRus plant database number " 4610 ".
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Chamaecostus subsessilis

Chamaecostus subsessilis (Nees & Mart.) C.Specht & D.W.Stev.



Accession # R2839 identified as Chamaecostus subsessilis from Le Jardin Ombragé
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Photo# 13199 Specimen# R3248
Chamaecostus subsessilis at Alta Floresta study plot - bract, bracteole and calyx


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Photo# 13200 Specimen# R3248
Chamaecostus subsessilis at Alta Floresta study plot - flower parts


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Photo# 13201 Specimen# R3248
Chamaecostus subsessilis at Alta Floresta study plot - immature seeds


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Photo# 13202 Specimen# R3248
Chamaecostus subsessilis at Alta Floresta study plot - inflorescence detail


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Photo# 13203 Specimen# R3248
Chamaecostus subsessilis at Alta Floresta study plot - Lais Alves Lage digging a plant to study the cellular structure of the root tubers.


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Photo# 13204 Specimen# R3248
Chamaecostus subsessilis at Alta Floresta study plot - Lais Alves Lage digging a plant to study the cellular structure of the root tubers.


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Photo# 13123 Specimen# R3248
Chamaecostus subsessilis at Alta Floresta study plot


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Photo# 13124 Specimen# R3248
Chamaecostus subsessilis at Alta Floresta study plot


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Photo# 13125 Specimen# R3248
Chamaecostus subsessilis at Alta Floresta study plot


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Photo# 13126 Specimen# R3248
Chamaecostus subsessilis at Alta Floresta study plot


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Photo# 13127 Specimen# R3248
Chamaecostus subsessilis at Alta Floresta study plot


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Photo# 13205 Specimen# R3247
Chamaecostus subsessilis in Brasilia - immature seeds


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Photo# 13206 Specimen# R3247
Chamaecostus subsessilis in Brasilia - leaves were mostly glabrous with purplish margins on the Brasilia plant


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Photo# 13207 Specimen# R3247
Chamaecostus subsessilis in Brasilia calyx with very sharp, triangular lobes


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Photo# 13208 Specimen# R3247
Chamaecostus subsessilis in Brasilia flower


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Photo# 13128 Specimen# R3247
Chamaecostus subsessilis in Brasilia


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Photo# 13129 Specimen# R3247
Chamaecostus subsessilis in Brasilia


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Photo# 13130 Specimen# R3247
Chamaecostus subsessilis in Brasilia


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Photo# 13131 Specimen# R3247
Chamaecostus subsessilis in Brasilia


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Photo# 13132 Specimen# R3247
Chamaecostus subsessilis in Brasilia


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Photo# 13133 Specimen# R3247
Chamaecostus subsessilis in Brasilia


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Photo# 13134 Specimen# R3247
Chamaecostus subsessilis in Brasilia


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Photo# 13135 Specimen# R3247
Chamaecostus subsessilis in Brasilia - found in a city park in a very small patch of remaining forest


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Photo# 13136 Specimen# R3247
Chamaecostus subsessilis in Brasilia - found in a city park in a very small patch of remaining forest


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Photo# 13137 Specimen# R3247
Chamaecostus subsessilis in Brasilia - Plants were smaller and more upright growing here than the cultivated plant from Bolivia or the plants seen in Cristalino


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Photo# 13138 Specimen# R3247
Chamaecostus subsessilis in Brasilia - they were only found in a section with rocky soil and often next to trees.


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Photo# 13209 Specimen# R3251
Chamaecostus subsessilis at Cristalino


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Photo# 13210 Specimen# R3251
Chamaecostus subsessilis at Cristalino - bracteole and calyx


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Photo# 13211 Specimen# R3251
Chamaecostus subsessilis at Cristalino - inflorescence parts detailed


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Photo# 13212 Specimen# R3251
Chamaecostus subsessilis at Cristalino - root system and tuber


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Photo# 13139 Specimen# R3251
Chamaecostus subsessilis at Cristalino


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Photo# 13140 Specimen# R3251
Chamaecostus subsessilis at Cristalino


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Photo# 13141 Specimen# R3251
Chamaecostus subsessilis at Cristalino


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Photo# 13142 Specimen# R3251
Chamaecostus subsessilis at Cristalino


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Photo# 13143 Specimen# R3251
Chamaecostus subsessilis at Cristalino - a few plants had this greyish appearance to the leaves. Some mineral deficiency?


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Photo# 13144 Specimen# R3251
Chamaecostus subsessilis at Cristalino - growing alongside a large boulder.


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Photo# 13145 Specimen# R3251
Chamaecostus subsessilis at Cristalino - growing around and between rocks.


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Photo# 13146 Specimen# R3251
Chamaecostus subsessilis at Cristalino - growing in leaf mulch in the crack of a boulder.


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Photo# 13147 Specimen# R3251
Chamaecostus subsessilis at Cristalino - growing in leaf mulch on large rocky outcrop


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Photo# 13148 Specimen# R3251
Chamaecostus subsessilis at Cristalino. Here on a large rocky outcrop the C. subsessilis nearly carpeted the rocks, mixed with another unknown plant.


BOTANICAL NAME: Chamaecostus subsessilis
SUBGENUS:
GROUP:Bracts appendaged
SECTION:
PRIMARY SOURCE USED FOR DESCRIPTION:Maas, Flora Neotropica No. 8, 1972
SECONDARY SOURCES:
LAST UPDATED:
NOTES AND DISTINGUISHING CHARACTERISTICS:Dr. Maas says it is a highly variable species, differences in leaf shape and hairiness. Maas has joined together with C. pumilus, C. acaulis, C. paucifolius, C. rosulifer, C. latifolius, C. pilossissimus, C. gagnepainii, C. steinbachii and C. kaempferoides. NOTE: listed in Flora Neotropica No 8 under former name, C. warmingii - Maas determined the earlier name, C. subsessilis is correct.

This is one of the few cultivated species in Costaceae that is deciduous with a natural winter dormancy. It is currently being studied and documented for what is called an "intermittent shoot" adaptation where the plant only sends up new shoots when the rainy season begins, but goes dormant in the dry season.

The photos to the left have been verified as Chamaecostus subsessilis. Specimen R2839 is the cultivated plant that was collected many years ago in Bolivia by Bob See. Specimen R3247 is from the Brazilian Cerrado, found in a small forest patch in a city park in Brasilia. Specimen R3248 is from a forest patch near Alta Floresta, Mato Grosso state, Brazil. Specimen R3251 is from the Cristalino Private Reserve in Brazil.
NATURAL DISTRIBUTION:Wet forests, terra firma or savannas in southern Brazil and Bolivia
HEIGHT:0 to 0 meters
Botanical Description for this Species
For illustrations or explanation of terminology, click on the linked plant part or column header.
Descriptions used for plant identification key are shown in BOLD.
Plant PartGeneralColorHairsTextureShape LengthWidth
Rhizomeroots fleshy with tubers




2 to 5 cm80 to 200 cm
Sheath

variable
membranaceous
obtuse at apex
2 to 6 cm 50 to 200 mm
Ligulevery short




0 to 1 mm 0 to 0 mm
Petiole absent




0 to 0 mm 0 to 0 mm
Leaf 4-6 rosulate



obovate to elliptic
5 to 30 cm 3 to 13 cm
...upper

variable




...under

variable




...base



cuneate


...apex



mucronate or shortly acuminate
0 to 0 mm
Inflorescence terminal on leafy stem




0 to 0 cm 0 to 0 cm
Bract
green
variable
herbaceous

0.0 to 4.0 cm 0.5 to 1.5 cm
Appendage appendage found on bract or apex reflexed
green

foliaceous
mucronate, triangular to deltate
0.0 to 0.0 cm 0.0 to 0.0 cm
Bracteole bicarinate at the abaxial side, 2 lobed at apex

variable
membranaceous
tubular
2.5 to 3.2 cm 0.0 to 0.0 cm
Flower 1 to 4 flowered
yellow



0 to 0 cm 0 to 0 cm
Calyx 21-41 mm long

variable
membranaceous to herbaceous

2.1 to 4.1 cm 0.0 to 0.0 cm
Corolla tube 25-30 mm
yellow
variable

mucronate
5.5 to 7.0 cm 0.0 to 0.0 cm
Labellum
yellow or slightly blotched orange at middle


broadly ovate
6.0 to 7.0 cm 7.0 to 9.5 cm
Stamen anther caudate at the apex
yellow


obovate
0.0 to 0.0 cm 0.0 to 0.0 cm

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