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Botanical Description page for GingersRus plant database number " 3108 ".

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

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Costus varzearum

Costus varzearum Maas

Accession # R1394 identified as Costus varzearum from Le Jardin Ombragé
Accession # R3282 identified as Costus varzearum 'Maldonado' from Le Jardin Ombragé
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Photo# 12054 Specimen# R1394 Costus varzearum bracteole

Photo# 12055 Specimen# R1394 Costus varzearum bracts

Photo# 12056 Specimen# R1394 Costus varzearum bracts

Photo# 12057 Specimen# R1394 Costus varzearum bracts sequence

Photo# 12058 Specimen# R1394 Costus varzearum bracteole and calyx

Photo# 12059 Specimen# R1394 Costus varzearum calyx

Photo# 12060 Specimen# R1394 Costus varzearum corolla lobes

Photo# 12061 Specimen# R1394 Costus varzearum corolla lobes

Photo# 12062 Specimen# R1394 Costus varzearum labellum

Photo# 12063 Specimen# R1394 Costus varzearum labellum

Photo# 12064 Specimen# R1394 Costus varzearum labellum

Photo# 12065 Specimen# R1394 Costus varzearum labellum

Photo# 12066 Specimen# R1394 Costus varzearum labellum

Photo# 12067 Specimen# R1394 Costus varzearum labellum with stamen

Photo# 12068 Specimen# R1394 Costus varzearum labellum with stamen

Photo# 12069 Specimen# R1394 Costus varzearum leaf abaxial side

Photo# 12070 Specimen# R1394 Costus varzearum leaf apex

Photo# 12071 Specimen# R1394 Costus varzearum flower bud shown in bract-bracteole-calyx

Photo# 12072 Specimen# R1394 Costus varzearum petiole and ligule

Photo# 12073 Specimen# R1394 Costus varzearum stamen

Photo# 12074 Specimen# R1394 Costus varzearum stamen

Photo# 12075 Specimen# R1394 Costus varzearum leaf apex

Photo# 12076 Specimen# R1394 Costus varzearum ligule

Photo# 12077 Specimen# R1394 Costus varzearum

Photo# 12078 Specimen# R1394 Costus varzearum

Photo# 12079 Specimen# R1394 Costus varzearum

Photo# 12080 Specimen# R1394 Costus varzearum

Photo# 12081 Specimen# R1394 Costus varzearum

Photo# 12082 Specimen# R0 Costus varzearum at Fairchild Tropical Gardens, Miami,

Photo# 12841 Specimen# R0 Costus varzearum at Lyon Arboretum, Oahu, Hawaii

Photo# 12842 Specimen# R0 Costus varzearum at Lyon Arboretum, Oahu, Hawaii

Photo# 17274 Specimen# R2994 Costus varzearum

Photo# 17275 Specimen# R2994 Costus varzearum

Photo# 17397 Specimen# R3282 Costus varzearum 'Maldonado' form

Photo# 17398 Specimen# R3282 Costus varzearum 'Maldonado' form

Photo# 17399 Specimen# R3282 Costus varzearum 'Maldonado' form

Photo# 17400 Specimen# R3282 Costus varzearum 'Maldonado' form

Photo# 17401 Specimen# R3282 Costus varzearum 'Maldonado' form

Photo# 17402 Specimen# R3282 Costus varzearum 'Maldonado' form

Photo# 17403 Specimen# R3282 Costus varzearum 'Maldonado' form

Photo# 17404 Specimen# R3282 Costus varzearum 'Maldonado' form

Photo# 17405 Specimen# R3282 Costus varzearum 'Maldonado' form

Photo# 17406 Specimen# R3282 Costus varzearum 'Maldonado' form

Photo# 17407 Specimen# R3282 Costus varzearum 'Maldonado' form

BOTANICAL NAME: Costus varzearum
SUBGENUS:Costus
GROUP:1-bracts with appendage
SECTION:I-Costus
PRIMARY SOURCE USED FOR DESCRIPTION:Maas, Flora Neotropica No. 18, 1977
SECONDARY SOURCES:
LAST UPDATED:
NOTES AND DISTINGUISHING CHARACTERISTICS:This species was named by Maas from the C. claviger group. He says it is closely related to the Guianan plant, Costus claviger, distinguished by a longer ligule, smaller leaves, smaller flowers, and terminal inflo. instead of basal.

The photos are from a plant in horticulture, and this seems to match perfectly with Maas' description of the species. He has an excellent drawing of this plant in Flora Neotropica No. 18. I have sometimes seen this plant incorrectly named as "Costus sanguineus" in US horticulture.
NATURAL DISTRIBUTION:Inhabits only the varzea forests of Brazil - states of Amazonus and Acre
HEIGHT:0 to 1 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		green, tinged purple-red	glabrous to densely hairy	scabrid		0 to 0 cm	10 to 15 mm
Ligule	unequally 2 lobed	purplish	glabrous to densely hairy		lobes rounded	20 to 30 mm	0 to 0 mm
Petiole		purplish	densely hairy like sheaths			5 to 10 mm	0 to 0 mm
Leaf	Leaves not plicate, apex ending in a densely hairy filiform point				elliptic-obovate	13 to 25 cm	5 to 10 cm
...upper		green	glabrous
...under		red-purple	densely puberulous	soft
...base					cuneate to obtuse
...apex					acute to very shortly acuminate	2 to 4 mm
Inflorescence	terminal on 3-7 leaved shoot				ovoid	4 to 6 cm	3 to 4 cm
Bract	all bracts with foliaceous, green appendages, or apices of all bracts reflexed., callus dark green	pinkish red	densely, appressed hairs	coriaceous	ovate	2.0 to 2.5 cm	1.0 to 1.8 cm
Appendage	5-15 mm by 8-16 mm, horizontally spreading	green	densely puberulous	foliaceous	triangular-ovate, rounded apex	0.5 to 1.5 cm	0.8 to 1.6 cm
Bracteole		pinkish red	densely puberulous		boat shape	1.5 to 1.8 cm	0.0 to 0.0 cm
Flower						0 to 0 cm	0 to 0 cm
Calyx	8-10 mm	pinkish red	densely puberulous		lobes shallow triangular	0.8 to 1.0 cm	0.0 to 0.6 cm
Corolla	47-55 mm, tube yellow 10-20 mm	yellow to pink				4.7 to 5.5 cm	0.0 to 0.0 cm
Labellum	large, spreading limb, lateral lobes reddish striped, middle lobes reflexed, 40-45 mm by 25-28 mm	creamy white to pale yellow			narrowly ovate	4.0 to 4.5 cm	2.5 to 2.8 cm
Stamen	gradually narrowed towards red apex, anther 6-7 mm long	creamy white				3.5 to 3.8 cm	0.7 to 0.8 cm

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