Craterostigma plantagineum Hochst.

Blue gem (en)

Species

Angiosperms > Lamiales > Linderniaceae > Craterostigma

Characteristics

Perennial, succulent, stemless herb, up to 100 mm high. Leaves in basal rosette, oval to broadly ovate, entire, thick, strongly ± parallel-veined, petiolate. Flowers usually several in dense racemes on ± erect, bracteate scapes with short pedicels. Corolla tubular, bilabiate, upper lip hood-like, lobes white with blue or purple marks and 2 orange spots. Anthers 4, glabrous. Flowering time Oct.-Mar.
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Leaves petiolate; lamina broadly ovate to lanceolate, 1.5–5 x 1–3 cm., entire, broadly cuneate at base, subacute at apex, glabrous above, densely pubescent beneath, numerous parallel nerves obscure or indented above, prominent beneath, often purple beneath; petiole short and broad.
Herb, up to 80 mm tall, pubescent. Leaves radical, rosulate, broadly ovate, many-nerved, rather fleshy. Flowers racemose, up to 90 mm long. Filaments not or scarcely appendaged. Flowers pale bluish.
Inflorescence 4–8 cm. long, with flowers racemose in upper third, pubescent; bracts opposite, lanceolate 4–10 mm. long, shorter than the pedicels at least in fruit.
Corolla purple and white, up to 18 mm., long, upper lip short bilobed, lower lip obtusely 3-lobed the central very broad.
Calyx c. 5 mm. long up to 9 mm. in fruit, shortly toothed, pubescent mainly on the nerves.
A rosette perennial with short stout rhizome and numerous orange-yellow roots.
Capsule ovoid-cylindric, glabrous, slightly longer than calyx.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.08 - 0.1
Root system rhizome
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity 1-9
Soil texture 7-9
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-12

Usage

Uses environmental use medicinal
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Leaf

Craterostigma plantagineum leaf picture by Susan Brown (cc-by-sa)
Craterostigma plantagineum leaf picture by susan brown (cc-by-sa)
Craterostigma plantagineum leaf picture by susan brown (cc-by-sa)

Flower

Craterostigma plantagineum flower picture by Susan Brown (cc-by-sa)
Craterostigma plantagineum flower picture by susan brown (cc-by-sa)
Craterostigma plantagineum flower picture by susan brown (cc-by-sa)

Fruit

Craterostigma plantagineum fruit picture by susan brown (cc-by-sa)

Distribution

Craterostigma plantagineum world distribution map, present in Angola, Burundi, Burkina Faso, Botswana, Ethiopia, India, Kenya, Namibia, Niger, Rwanda, Sudan, Somalia, South Sudan, Chad, Tanzania, United Republic of, Uganda, South Africa, Zambia, and Zimbabwe

Identifiers

LSID urn:lsid:ipni.org:names:801738-1
WFO ID wfo-0000625664
COL ID Z94N
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Craterostigma nanum Torenia plantaginea Craterostigma plantagineum