Utricularia minutissima Vahl

Species

Angiosperms > Lamiales > Lentibulariaceae > Utricularia

Characteristics

Terrestrial. Rhizoids few, capillary, simple. Stolons capillary, sparsely branched. Foliar organs sparsely rosulate and on the stolons, narrowly linear to narrowly obovate-spathulate, up to 2 cm by 0.5-1 mm, apex obtuse, 1-nerved. Traps numerous on the vegetative organs, broadly ovoid, c. 0.2 mm long, stalked, mouth lateral, upper lip with a solitary multicellular subulate appendage, lower lip with radiating rows of basally connate obliquely gland-tipped processes. Inflorescence erect, 3-12 cm long, glabrous or with a few short septate hairs on the peduncle; peduncle terete, filiform; flowers 1-10, distant; scales numerous, similar to the bracts; bracts basifixed, narrowly ovate, acute, 0.8-1 mm long; bracteoles similar or less acute; additional bracts subtending dormant (inflorescence branch) buds usually present on inflorescence axis a short distance above each or most of those subtending flowers; pedicels erect, capillary terete, c. 1 mm long. Calyx lobes sub-equal, broadly ovate, 1-2 mm long, apex of upper obtuse, of lower emarginate, nerves obscure, not raised. Corolla mauve or white, 2.5-7 mm long, upper lip narrowly oblong, much longer than upper calyx lobe, apex emarginate or rounded, lower lip larger, ± orbicular, obscurely to distinctly 3-lobed, palate raised, spur subulate, obtuse, straight, usually much longer than and parallel with the lower lip. Filaments linear curved, anther thecae ± confluent. Ovary ovoid, style short, stigma lower lip orbicular, upper lip much smaller, deltoid. Capsule obliquely oblong-ovoid, 1.5-2 mm long, membranous in texture, translucent, dehiscing by a longitudinal ventral slit which is marginally scarcely thickened. Seeds few globose, 0.17-0.2 mm long, testa smooth, reticulate, reticulations relatively large, ± isodiametric.
More
Annuals, terrestrial. Rhizoids capillary, simple. Stolons capillary, sparsely branched. Traps on rhizoids, stolons, and leaves, stalked, ovoid, ca. 0.2 mm, mouth lateral; appendage 1, dorsal, subulate, with 1 or 2 ventral pairs of trichome rows. Leaves few, from peduncle base and stolons, glabrous; leaf blade narrowly obovate to linear, 0.3-2 cm × 0.4-0.8 mm, membranous, vein 1, base attenuate onto petiole, margin entire, apex slightly obtuse. Inflorescences erect, 3-12 cm, 1-10-flowered, glabrous; peduncle terete, 0.2-0.4 mm thick; scales few, similar to bracts; bracts basifixed, narrowly ovate, 0.5-1 mm, apex acute. Pedicel erect, ± as long as bracts, filiform; bracteoles similar to bracts but sometimes narrower or less acute. Calyx lobes convex, 1.5-2 mm, subequal, glabrous; lower lobe apex emarginate; upper lobe ovate, apex obtuse. Corolla violet or white, 3-7 mm; lower lip suborbicular, base with a rounded 4-lobed swelling, margin distinctly 3-lobed; spur subulate, much longer than lower corolla lip, apex acute; upper lip oblong to obovate, apex emarginate to rounded. Filaments ca. 0.8 mm, slightly curved; anther thecae distinct. Ovary ovoid; style short; stigma lower lip transversely elliptic, upper lip deltoid. Capsule obliquely ellipsoid, 1.5-2 mm, dehiscing by a single longitudinal ventral slit. Seeds globose to broadly ellipsoid, 2-3 mm; seed coat with prominent reticulations. Fl. Sep-Nov, fr. Nov-Dec. 2n = 16.
Life form annual
Growth form herb
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Sexuality hermaphrodite
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OctNovDec
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OctNovDec
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Environment

Damp open sandy or rocky places and peaty swamps, also found on wet limestone, mostly at low altitude but ascending to 2100 m on G. Tahan (Malaya). Fl. March-Dec.
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Hardiness (USDA) 8-12

Usage

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Cultivation

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Images

Utricularia minutissima unspecified picture

Distribution

Utricularia minutissima world distribution map, present in Australia, China, Indonesia, India, Japan, Cambodia, Lao People's Democratic Republic, Sri Lanka, Myanmar, Philippines, Papua New Guinea, Singapore, Thailand, and Viet Nam

Conservation status

Utricularia minutissima threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:526925-1
WFO ID wfo-0001230103
COL ID 7F4RG
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Utricularia minutissima f. albiflora Meionula parviflora Utricularia minutissima Utricularia nipponica Utricularia pygmaea Vesiculina pygmaea Utricularia siamensis Utricularia nigricaulis Utricularia calliphysa Utricularia brevilabris Utricularia lilliput Utricularia evrardii Utricularia nipponica f. albiflora Utricularia brevilabris var. parviflora