Utricularia caerulea L.

Bladderwort (en)

Species

Angiosperms > Lamiales > Lentibulariaceae > Utricularia

Characteristics

Terrestrial. Rhizoids few to very numerous, capillary, simple. Stolons capillary, sparsely branched. Foliar organs not always conspicuous at anthesis, rosulate and on the stolons, narrowly obovate-spathulate, up to 7 mm long and 1.5 mm wide, apex rounded, 1-nerved. Traps rather few on the vegetative organs, ± dimorphic, ovoid, shortly stalked, mouth terminal, oblique, the larger traps up to 1.5 mm long including a long carinate beak on the upper lip, the smaller traps about half as long with a relatively shorter beak, mouth and beak of both types densely stipitate-glandular. Inflorescence erect, 5-30 cm long; peduncle filiform to relatively stout, 0.3-1.5 mm thick, terete, glabrous; flowers 1-20 or more very variably disposed, distant to quite densely congested and sub-capitate; scales numerous, similar to the bracts; bracts medifixed, variably attached above or below the middle, narrowly rhombic, acuminate at both extremities, 2-2.5 mm long; bracteoles similar but often shorter and narrower; pedicels erect at anthesis, spreading or reflexed in fruit, filiform, terete, 0.5-1 mm long. Calyx lobes unequal, usually minutely papillose, upper ovate-oblong, cucullate, 2-3 mm long, apex rounded, lower shorter, transversely elliptic with conspicuously inrolled margins. Corolla pink, mauve, purple or blue, often white and sometimes ? yellow, 4-10 mm long, externally minutely papillose, upper lip narrowly ovate-oblong, longer than upper calyx lobe, apex rounded or truncate, lower lip larger, ± orbicular, apex retuse, palate raised, ± conspicuously transversely crested, spur narrowly conical or cylindrical from a broader conical base, straight or curved, usually longer than and ± parallel with the lower lip. Filaments filiform, straight, c. 1 mm long, anther thecae distinct, minutely papillose. Ovary ovoid, style variably in length, usually distinct, stigma lower lip orbicular, upper lip minute, deltoid. Capsule globose, c. 2 mm long, firm, opaque, dehiscing by a ventral longitudinal slit. Seeds numerous, obliquely oblong-ellipsoid, c. 0.3 mm long, testa thin, smooth to distinctly papillose, obscurely reticulate, reticulations elongate.
More
Annuals, terrestrial. Rhizoids and stolons capillary, branched. Traps on stolons and leaves, stalked, ovoid, 0.2-1 mm, with stipitate glands on appendage and mouth margin, mouth lateral; appendage 1, dorsal, subulate, beaklike. Leaves numerous, from peduncle base and stolon nodes, glabrous; leaf blade linear to linear-obovate, 0.3-2 cm × 0.5-2 mm, membranous, veins 3, base attenuate onto petiole, margin entire, apex rounded. Inflorescences erect, 5-44 cm, 1-15-flowered, glabrous; peduncle terete, 0.3-1.2 mm thick; scales 1-12, similar to bracts; bracts basisolute, oblanceolate, 1.5-3 mm, base cuneate, apex acute. Pedicel erect at anthesis but spreading to deflexed in fruit, 0.2-1 mm, minutely papillose; bracteoles basisolute, ovate-lanceolate, 1-2 mm. Calyx lobes minutely papillose, glabrous; lower lobe suborbicular, smaller than upper lobe, apex retuse; upper lobe ovate-oblong, 2-3 mm, apex rounded. Corolla violet, pink, or white, marked with yellow at throat, 4-10 mm; lower lip broadly ovate, with a basal 4-ridged swelling, apex rounded to emarginate; spur narrowly conic, usually longer than lower corolla lip, apex subacute; upper lip oblong to ovate-oblong, apex retuse. Filaments 1-2 mm, straight; anther thecae ± distinct. Ovary globose; style short; stigma lower lip semicircular, upper lip deltoid. Capsule globose to ellipsoid, 1.5-2 mm, dehiscing by a short longitudinal ventral slit. Seeds obovoid to oblong-ellipsoid, 0.2-0.3 mm; seed coat with prominent elongate reticulations and conic to clavate papillae. Fl. Jun-Jan, fr. Jul-Feb. 2n = 36, 40.
Life form annual
Growth form herb
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
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Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway -

Environment

Damp or wet open situations on sand (also on kerangas and in heath-forest) or mud both under everwet and seasonal climatic conditions, from sea-level to 2700 m. Fl. Jan.-Dec.
Light -
Soil humidity -
Soil texture -
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Hardiness (USDA) 8-12

Usage

Uses medicinal
Edible -
Therapeutic use Wound (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) -
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Images

Utricularia caerulea unspecified picture

Distribution

Utricularia caerulea world distribution map, present in Australia, Bangladesh, China, Guam, Indonesia, India, Japan, Cambodia, Lao People's Democratic Republic, Sri Lanka, Myanmar, Malaysia, Nepal, Philippines, Palau, Papua New Guinea, Korea (Democratic People's Republic of), Singapore, Thailand, Taiwan, Province of China, United States of America, and Viet Nam

Identifiers

LSID urn:lsid:ipni.org:names:526656-1
WFO ID wfo-0001230105
COL ID 7F5F6
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Utricularia racemosa f. leucantha Calpidisca takenakai Utricularia complanata Calpidisca tatenakae Utricularia cavalerii Utricularia caerulea Utricularia filicaulis Utricularia obtusiloba Utricularia nivea Utricularia capillaris Utricularia squamosa Utricularia albina Utricularia roseo-purpurea Utricularia sampathii Utricularia campestris Utricularia ramosa Utricularia racemosa Pelidnia caerulea Utricularia paucifolia Utricularia ophirensis Utricularia sootepensis Utricularia kerrii Utricularia charnleyensis Utricularia rosea Utricularia racemosa var. filicaulis Utricularia racemosa var. rosea Utricularia nivea var. rosea Utricularia caerulea var. filicaulis Utricularia filicaulis var. papillosa