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Costus Species Botanical Description Botanical Description page for GingersRus plant database number " 4203 ".
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Chamaecostus lanceolatus

Chamaecostus lanceolatus (Petersen) C.Specht & D.W.Stev.



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Photo# 13186 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus


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Photo# 13187 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus - flower is colorful but is actually quite small, about 35 mm across.


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Photo# 13188 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus - this shows the rhizome and thickened root system for survival during the dry season.


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Photo# 13189 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus bracteole, tubular, bicarinate type found in Chamaecostus distinguished from the unicarinate type usually found in Costus.


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Photo# 13190 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus calyx


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Photo# 13191 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus corolla lobes


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Photo# 13192 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus flower, about 5 cm in length, tubular but with an unusual (for Costaceae) flat spreading labellum.


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Photo# 13193 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus inflorescence. Note the elongated shape which distinguishes it from subsp pulchriflorus which has a subcapitate inflorescence.


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Photo# 13194 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus is distinguished from subsp pulchriflorus by the length of the calyx and bract being about equal. Here we have (from top to bottom) the calyx with a flower bud, the very small bracteole, and the bract.


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Photo# 13195 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus root system in young plant


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Photo# 13196 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus stamen and style


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Photo# 13197 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus. Note the ants attracted to the yellow nectar callous on the bracts.


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Photo# 13198 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus. Note the yellow nectar callous on the bract.


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Photo# 13111 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus


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Photo# 13112 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus


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Photo# 13113 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus


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Photo# 13114 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus


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Photo# 13115 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus


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Photo# 13116 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus


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Photo# 13117 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus


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Photo# 13118 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus


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Photo# 13119 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus - flower is colorful but is actually quite small, about 35 mm across.


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Photo# 13120 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus - I often found it growing right next to the roots of large trees, presumably holding more moisture during the dry season.


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Photo# 13121 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus - I often found it growing right next to the roots of large trees, presumably holding more moisture during the dry season.


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Photo# 13122 Specimen# R3249
Chamaecostus lanceolatus subsp lanceolatus - note the distinctive silvery midrib (as in Costus laevis in Central Americ). Makes these easy to recognize even as young plants.


BOTANICAL NAME: Chamaecostus lanceolatus
SUBGENUS:
GROUP:Bracts not appendaged
SECTION:
PRIMARY SOURCE USED FOR DESCRIPTION:Maas, Flora Neotropica No. 8, 1972
SECONDARY SOURCES:
LAST UPDATED:
NOTES AND DISTINGUISHING CHARACTERISTICS:Subsp. lanceolatus (Colombia & Brazil) has calyx about as long as the bract and infl is usually elongated. Subsp. pulchriflorus (Surinam) has calyx 2-2.5 times as long as bract and infl is subcapitate. Both are distinguished from C. congestflorus and C. fragilis by the flower color and the form of the infl.

This species was very common in the Alta Floresta area, Mato Grosso state, Brazil. Photos to the left are from that area and the Cristalino Private Reserve. They are all from subspecies lanceolatus - not from subspecies pulchriflorus as indicated on the Kew website at http://www.kew.org/science/tropamerica/imagedatabase/large1/cat_single1-1091.htm (see photo series at 1089-1093.htm)

I have seen photos of a plant I believe to be subsp. pulchriflorus on the internet at http://www.flickr.com/photos/grandma-shirley/5874278239/in/photostream/. They were taken at Carajas in Para state in Brazil. The plants in these photos do not have the elongated inflorescence, but I cannot tell for sure how the calyx length compares to the bract length.
NATURAL DISTRIBUTION:Colombia, Surinam and Brazil
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
Rhizome




0 to 0 cm0 to 0 cm
Sheath

glabrous to minutely densely puberulous


0 to 0 cm 3 to 8 mm
Ligule

glabrous


1 to 4 mm 0 to 0 mm
Petiole

glabrous


2 to 4 mm 0 to 0 mm
Leaf



narrowly elliptic to narrowly obovate
6 to 20 cm 2 to 7 cm
...upper

glabrous to minutely densely puberulous




...under

glabrous to minutely densely puberulous




...base



cuneate to rounded


...apex



acuminate
5 to 20 mm
Inflorescence terminal on a leafy stem



angular obovode to fusiform
3 to 15 cm 2 to 4 cm
Bract not imbricate, 5-12 mm wide, callus 1-5 mm long
green
glabrous to minutely densely puberulous
herbaceous to chartaceous
triangular
1.0 to 3.5 cm 0.5 to 0.8 cm
Appendage appendage not found on bract




0.0 to 0.0 cm 0.0 to 0.0 cm
Bracteole tubular but often deeply split, 2 lobed
green
glabrous to minutely densely puberulous
herbaceous to chartaceous
tubular but often deeply split, 2 lobed
1.0 to 1.7 cm 0.0 to 0.0 cm
Flower
purplish



0 to 0 cm 0 to 0 cm
Calyx
green
glabrous to minutely densely puberulous
herbaceous to chartaceous

2.0 to 3.2 cm 0.0 to 0.0 cm
Corolla tube 15-25 mm long
fiery red to orange red
glabrous or minutely puberulous


5.0 to 6.0 cm 0.0 to 0.0 cm
Labellum limb suborbicular, margins crenulate
fiery red to deep crimson, drying deep purple
shortly fimbriate or glabrous


2.5 to 3.0 cm 3.0 to 3.5 cm
Stamen Basal part of stamen and labellum joined in a slender tube 45-50 mm long and 4-5 mm wide
orange


apex irreg. Dentate, stigma cup shaped
1.2 to 1.5 cm 0.3 to 0.6 cm

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