Crassula decumbens Thunb.

Crassule du Langeberg (fr)

Species

Angiosperms > Saxifragales > Crassulaceae > Crassula

Characteristics

Small glabrous, annual herb, dense and much-branched but not forming mats; stems 2-7-(10) cm long, decumbent to erect, rooting at lowest nodes, especially in moist conditions. Lvs connate at base, decussate, 3-6 × 0.4-1.5 mm, 0.4-0.9 mm thick, linear-lanceolate, flattened, convex above and beneath, green or greenish brown, without hydathodes; apex subacute or acute. Infl. of 1-several, elongated, much-branched cymes; bracts leaflike. Fls 4-merous, several to many, not star-like, 3-4 mm diam.; pedicels c. 1-2 mm long at anthesis, at least some 5-10-(15) mm long at fruiting. Calyx 1.5-3.5 mm long; lobes lanceolate to triangular-lanceolate. Petals united at base, c. 1.3-2 × 0.7-1 mm, broadly ovate, white, often tinged pink, obtuse, usually slightly < or ± = calyx, occasionally slightly > calyx. Stamens 0.8-1.1 mm long, > carpels at anthesis. Scales 0.15-0.2 mm long, widely T-shaped or very broadly wing-like, dark red. Follicles with 4-10 seeds, smooth. Seed 0.3-0.4 × c. 0.15 mm, oblong, strongly papillate. Fruiting infl. lacking plantlets.
More
Annuals with erect or decumbent branches 40-120 mm long, rarely much shorter, glabrous. Leaves sessile, linear-lanceolate to elliptic or oblanceolate, 3-8(-10) x 0.5-2 mm, acute or obtuse, more or less flat above, usually strongly convex below, glabrous, very fleshy, green to reddish-brown. Inflorescence a thyrse with many dichasia, rarely reduced to one terminal flower, with pedicellate 4 or 5-merous flowers. Calyx: lobes lanceolate, 1-2(-3) mm long, acute, glabrous or with denticulate margins, slightly fleshy, green. Corolla cup-shaped, scarcely fused basally, white or cream; lobes lanceolate to broadly ovate, 1.5-3 mm long, acute to acuminate, spreading. Stamens with yellow anthers. Squamae T-shaped to transversely oblong-cuneate, 0.2-0.3 x 0.1-0.5 mm, usually truncate, more or less abruptly constricted downwards, almost membranous and slightly thickened towards apex, pale yellow or white. Seeds (2-)4-8(-12), released through apical pore of follicle.
Annual, succulent herb, erect or decumbent branches 0.04-0.12 m long. Leaves sessile, linear-lanceolate to elliptic, 3-8 x 0.5-2.0 mm, acute or obtuse, glabrous, fleshy, green to reddish brown. Inflorescence a thyrse with many dichasia; flowers pedicellate, 4-or 5-merous. Calyx glabrous with denticulate margins. Corolla cup-shaped, scarcely fused at base, white or cream-coloured; lobes lanceolate, 1.5-3.0 mm long, acute to acuminate, spreading. Flowering time Sept.-Nov.
Annual, with erect to decumbent branches, up to 120 mm tall. Leaves sessile, linear-lanceolate to elliptic or oblanceolate, ± terete, 3-8 x 0.5-2 mm. Flowers in ± sessile clusters arranged along stems, rarely solitary in axils, on slender pedicels, cup-shaped, petals 1.5-3 mm long, white or cream.
Erect or sprawling annual to 12 cm. Leaves opposite, linear-lanceolate to oblanceolate. Flowers in terminal and axillary cymes, cup-shaped, white, perianth 1.5-3.0 mm long.
Life form annual
Growth form herb
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.07 - 0.09
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity 4-6
Soil texture 5-6
Soil acidity -
Soil nutriment -
Hardiness (USDA) 7-11

Usage

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

Cultivation

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

Images

Crassula decumbens unspecified picture

Distribution

Crassula decumbens world distribution map, present in Australia, Chile, China, New Zealand, Tunisia, and South Africa

Identifiers

LSID urn:lsid:ipni.org:names:273090-1
WFO ID wfo-0000624966
COL ID Z77B
BDTFX ID 19316
INPN ID 92791
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Thisantha decumbens Crassula decumbens Crassula langebergensis Gomara decumbens Crassula leipoldtii Crassula macrantha Crassula mongolica Tillaea radicans Tillaea macrantha Tillaea trichotoma Tillaea ovallei Tillaea rencana Tillaea mongolica Crassula ovallei Crassula macrantha var. nuda Crassula radicans Crassula decumbens var. decumbens Tillaea macrantha var. sepalosa

Lower taxons

Crassula decumbens var. brachyphylla