Click on logo above to go to GingersRus HOMEPAGE. Botanical Description page for GingersRus plant database number " 3597 ".

You can select the botanical description of a different plant from this list: Click arrow to see list, then click GO Chamaecostus congestiflorus Chamaecostus curcumoides Chamaecostus cuspidatus Chamaecostus fragilis Chamaecostus fusiformis Chamaecostus lanceolatus Chamaecostus subsessilis Cheilocostus globosus Cheilocostus lacerus Cheilocostus speciosus Cheilocostus sopuensis Costus "El Whiskey" Costus sp. from Cabo Matapalo Costus acreanus Costus afer Costus albus Costus allenii Costus amazonicus Costus arabicus Costus asplundii Costus asteranthus Costus barbatus Costus beckii Costus bracteatus Costus chartaceus Costus claviger Costus claviger aff Costus comosus var. bakeri Costus comosus Costus cordatus Costus cupreifolius Costus curvibracteatus Costus deistelii Costus dewevrei Costus dirzoi Costus dubius Costus erythrocoryne Costus erythrophyllus Costus erythrothyrsus Costus fissiligulatus Costus foliaceus Costus gabonensis Costus geothyrsus Costus glaucus Costus guanaiensis Costus guanaiensis var. macrostrobilacius Costus guanaiensis var. tarmicus Costus juruanus Costus laevis Costus lasius Costus lateriflorus Costus letestui Costus leucanthus Costus ligularis Costus lima Costus longebracteolatus Costus lucanusianus var. major Costus lucanusianus Costus Maas species A Costus Maas species B Costus maboumiensis Costus macranthus Costus maculatus Costus malortieanus Costus montanus Costus nitidus Costus nudicaulis Costus oblongus Costus osae Costus phaeotrichus Costus pictus Costus plicatus Costus plowmanii Costus potierae Costus productus Costus pulverulentus Costus quasi-appendiculatus Costus ricus Costus sarmentosus Costus scabe Costus spectabilis Costus spicatus Costus spiralis Costus sprucei Costus stenophyllus Costus subbiflorus Costus tappenbeckianus Costus tonkinensis Costus vargasii Costus varzearum Costus villosissimus Costus vinosus Costus violaceus Costus viridis Costus wilsonii Costus woodsonii Costus zamoranus Costus zingiberoides Paracostus englerianus Paracostus paradoxus

Costus dubius

Costus dubius (Afzel.) K.Schum.

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Photo# 15199 Specimen# R0 Costus dubius tagged dallachyi at NTBG 77-059001

Photo# 15198 Specimen# R0 Costus dubius tagged dallachyi at NTBG 77-059001

Photo# 15220 Specimen# R0 Costus dubius compared to Costus maculatus

Photo# 15197 Specimen# R2614 Costus dubius From cultivated,

Photo# 15196 Specimen# R2614 Costus dubius From cultivated,

Photo# 15195 Specimen# R2614 Costus dubius From cultivated,

Photo# 15219 Specimen# R2614 Costus dubius From cultivated,

Photo# 15194 Specimen# R0 Costus dubius at Marie Selby Gardens

BOTANICAL NAME: Costus dubius
SUBGENUS:Costus
GROUP:
SECTION:
PRIMARY SOURCE USED FOR DESCRIPTION:Lock - Flora of Tropical East Africa, 1985
SECONDARY SOURCES:
LAST UPDATED:
NOTES AND DISTINGUISHING CHARACTERISTICS:Description from Lock and Polhill, Flora of Tropical East Africa. Note that Lock says Koechlin's Costus albus is syn. for Costus dubius.
NATURAL DISTRIBUTION:Moist places at forest edges, 750-1250 m, through forest zone of tropical Africa westward to Sierra Leone - Cameroon, Tanzania, Uganda
HEIGHT:1 to 3 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 Part	General	Color	Hairs	Texture	Shape	Length	Width
Rhizome						0 to 0 cm	0 to 0 cm
Sheath			glabrous	sulcate		0 to 0 cm	0 to 0 mm
Ligule			glabrous	coriaceous		7 to 10 mm	0 to 0 mm
Petiole						7 to 20 mm	0 to 0 mm
Leaf					elliptic	24 to 36 cm	6 to 9 cm
...upper			ciliate margin toward apex	somewhat succulent
...under			midrib appressed pubescent, otherwise glabrous
...base					cuneate
...apex					acuminate	0 to 0 mm
Inflorescence	Basal - on separate leafless shoot					0 to 0 cm	0 to 0 cm
Bract		green with purple markings, darker margins			obtuse	2.5 to 3.5 cm	1.5 to 0.0 cm
Appendage						0.0 to 0.0 cm	0.0 to 0.0 cm
Bracteole		pale green, glossy			boat, thickened toward apex	2.0 to 2.5 cm	1.0 to 1.5 cm
Flower	single flower per bract	white w/ yellow center				0 to 0 cm	0 to 0 cm
Calyx		pale green	glabrous	fleshy	urceoate, 3 lobed	1.2 to 1.5 cm	0.0 to 0.0 cm
Corolla	tube 1.5 cm, hairy inside	white, semi transparent			slightly hooded at apex	2.0 to 2.5 cm	0.8 to 1.0 cm
Labellum	anther 7-8 mm long	white, central lemon yellow mark		thin, waivy margin	triangular, funnel shaped	2.5 to 0.0 cm	2.0 to 0.0 cm
Stamen					petaloid, eliptic, obtuse	2.0 to 2.5 cm	1.0 to 0.0 cm

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