Utricularia striatula Sm.

Species

Angiosperms > Lamiales > Lentibulariaceae > Utricularia

Characteristics

Epiphytic or terrestrial. Rhizoids few, capillary, simple. Stolons capillary, branched. Foliar organs numerous and conspicuous at anthesis, rosulate and on the stolons, obovate, orbicular or reniform with a ± distinct pseudopetiole, membranous, 3-10 mm long, up to 6 mm wide, with numerous dichotomously branched nerves. Traps numerous on the stolons, obliquely globose or ovoid, 0.6-0.8 mm long, long stalked, mouth lateral, upper lip projecting with 2 divergent stipitate-glandular appendages. Inflorescence erect, 1-15 cm long; peduncle filiform, glabrous, usually less than 0.3 mm thick; flowers 1-10, distant; scales few, similar to the bracts; bracts medifixed, lanceolate, apex obtuse or acute, base truncate to acute; bracteoles similar; pedicels spreading at anthesis, ± reflexed in fruit, capillary, usually less than 0.2 mm thick. Calyx lobes very unequal, papillose, upper orbicular-obcordate, 1.5-2.5 mm long at anthesis, apex emarginate, lower very much smaller, ovate-oblong, apex truncate or retuse. Corolla white, pink or mauve with a yellow spot on the palate, 3-10 mm long, upper lip minute, semi-orbicular, apex bidentate, very much shorter than the upper calyx lobe, lower lip orbicular or transversely elliptic, 3-10 mm wide, apex ± distinctly 3-5-lobed, palate slightly raised, spur subulate, usually curved, 1-4 mm long, shorter than and ± parallel with or somewhat divergent from the lower lip. Filaments filiform, c. 0.6 mm long, anther thecae subdistinct. Ovary globose, style short but distinct, stigma lower lip semi-orbicular, upper obsolete. Capsule ± globose, obliquely dorsiven-trally compressed, membranous, obscurely ven-trally keeled, dehiscing by a ventral longitudinal slit. Seeds few, pyriform or obovoid, c. 0.25 mm long, hilum terminal, prominent, testa smooth, bearing, especially distally, numerous unicellular apically glochidiate processes.
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Perennials, epiphytic or lithophytic. Rhizoids and stolons capillary, simple. Traps on rhizoids and stolons, stalked, ovoid, 0.6-0.8 mm, mouth lateral; appendage 1, dorsal, deeply 2-cleft, fringed with multicellular stipitate glands. Leaves numerous, from peduncle base and stolons, subsessile to petiolate; leaf blade obovate, orbicular, or transversely elliptic, 3-10 × 2-6 mm, thinly fleshy, veins dichotomously branched, base cuneate, attenuate, or rounded, margin entire, apex rounded. Inflorescences erect, 1-15 cm, 1-10-flowered; peduncle terete, 0.2-0.4 mm thick, glabrous; scales few, similar to bracts; bracts basisolute, narrowly ovate to oblong, 1-1.5 mm, glandular, base truncate, margin irregularly crenulate to denticulate, apex subacute to rounded. Pedicel spreading at anthesis but often pendulous and withered in fruit, 2-6 mm, capillary, slightly dorsiventrally compressed; bracteoles similar to bract but slightly smaller. Calyx lower lobe oblong-elliptic, much smaller than upper lobe, apex rounded to emarginate; upper lobe suborbicular to broadly obcordate, 1.5-2.5 mm, apex rounded to emarginate. Corolla white or violet, with a yellow spot at base of lower lip, 3-10 mm or much smaller when cleistogamous; lower lip transversely elliptic to suborbicular, apex 5-lobed; spur subulate, ± as long as lower lip, straight or curved, apex acute; palate fringed with hairs; upper lip subovate, much shorter than calyx, apex shortly 2-cleft. Filaments ca. 0.6 mm, straight; anther thecae distinct. Ovary ovoid to depressed globose; style very short; stigma lower lip semicircular, upper lip obsolete. Capsule globose, ca. 2.5 mm in diam., dorsiventrally compressed, dehiscing by a single longitudinal ventral slit. Seeds obovoid, 0.2-0.4 mm, densely covered with glochidiate processes except proximal end. Fl. Jun-Oct, fr. Jul-Nov.
Epiphytic herb.. Rhizoids and stolons capillary, numerous from base of the scape.. Leaves numerous and conspicuous at anthesis, rosulate at the scape-base and scattered on the stolons, obovate to reniform, petiolate, 3–10 mm. total length, the lamina 1–6 mm. wide.. Traps numerous, globose or ovoid, 0.6–0.8 mm. long, stalked; mouth lateral; upper lip shortly projecting with 2 divergent appendages densely covered with glandular hairs.. Inflorescence erect, straight, 1–15 cm. high; scape capillary, glabrous; flowers 1–10, distant; scales few, similar to the bracts; bracts medifixed, lanceolate, 1.5–2 mm. long; bracteoles similar to the bracts but smaller; pedicels capillary, 2–6 mm. long, spreading or sometimes reflexed in fruit.. Calyx-lobes very unequal and accrescent; upper lobe orbicular-obcordate, apex emarginate, 1.5–2.5 mm. long at anthesis; lower lobe ovate-oblong, ± half as long as the upper.. Corolla white or mauve with a yellow spot on the throat, 3–6 mm. long or sometimes much reduced (cleistogamous); upper lip minute, much shorter than the upper calyx-lobe, very shortly 2-lobed; lower lip orbicular in outline, 3–10 mm. long, ± regularly 5-lobed; palate slightly raised; spur subulate, curved or straight, ± as long as the lower lip.. Filaments filiform; anther-thecae subdistinct.. Ovary globose, adnate to the base of the upper calyx-lobe; style short; stigma lower lip semi-orbicular, upper lip obsolete.. Capsule globose, obliquely dorsiventrally compressed, carinate on the abaxial surface, dehiscing by a longitudinal abaxial slit.. Seeds numerous, ovoid, 0.25 mm. long, covered with short glochidiate processes.
Corolla white or mauve with a yellow spot on the throat, 3–6 mm. long or sometimes much reduced (cleistogamous); superior lip minute, much shorter than the upper calyx lobe, very shortly 2-lobed; inferior lip circular in outline, 3–10 mm. long, more or less regularly 5-lobed; palate slightly raised; spur subulate, curved or straight, more or less as long as the inferior lip.
Inflorescence erect, straight, 1–15 cm. high; peduncle capillary, glabrous; flowers 1–10, distant; scales few, similar to the bracts; bracts medifixed, lanceolate, 1.5–2 mm. long; bracteoles similar to the bracts but smaller; pedicels capillary, 2–6 mm. long, spreading or sometimes deflexed in fruit.
Calyx lobes very unequal and accrescent; upper lobe circular-obcordate, with apex emarginate, 1.5–2.5 mm. long at anthesis; lower lobe ovate-oblong, more or less half as long as the upper.
Leaves numerous and conspicuous at anthesis, rosulate at the peduncle base and scattered on the stolons, obovate to reniform, petiolate, 3–10 mm. 1–6 mm.
Traps numerous, globose or ovoid, 0.6–0.8 mm. long, stalked; mouth lateral, with a deeply bifid dorsal appendage, densely covered with glandular hairs.
Ovary globose, adnate to the base of the upper calyx lobe; style short; stigma inferior lip semicircular, superior lip obsolete.
Capsule globose, obliquely dorsiventrally compressed, carinate on the ventral surface, dehiscing by a longitudinal ventral slit.
Seeds numerous, ovoid, 0.25 mm. long, covered with short glochidiate processes.
Rhizoids and stolons capillary, numerous from the base of the peduncle.
Small pink or white flowers; very unequal calyx-lobes
Filaments filiform; anther-thecae subdistinct.
A delicate epiphyte of mossy trees or rocks
Numerous orbicular-spathulate leaves
Glochidiate seeds.
Epiphytic herb.
Life form perennial
Growth form herb
Growth support epiphyte
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.01 - 0.15
Root system -
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Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
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Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway -

Environment

Rocks or trees or less commonly damp soil among moss in somewhat shady permanently moist conditions, on mossy tree trunks, on stones in rivers, near waterfalls, on wet talus, from sea-level up to 3300 m. Fl. Jan.-Dec.
Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 8-12

Usage

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

Cultivation

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

Images

Utricularia striatula unspecified picture

Distribution

Utricularia striatula world distribution map, present in Angola, Burundi, Bhutan, Central African Republic, China, Côte d'Ivoire, Cameroon, Ethiopia, Gabon, Ghana, Guinea, Equatorial Guinea, Indonesia, India, Cambodia, Liberia, Sri Lanka, Madagascar, Myanmar, Malaysia, Nigeria, Nepal, Philippines, Papua New Guinea, Sierra Leone, Chad, Thailand, Taiwan, Province of China, Tanzania, United Republic of, Uganda, Viet Nam, South Africa, and Zambia

Conservation status

Utricularia striatula threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:527130-1
WFO ID wfo-0000417422
COL ID 7F59X
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Meloneura purpurea Utricularia striatula Utricularia harlandii Utricularia orbiculata Utricularia glochidiata Utricularia taikankoensis Utricularia rosulata Utricularia anthropophora Melonura striatula Utricularia philetas Lemnopsis minioides Utricularia striatula var. minor