Utricularia salwinensis Hand.-mazz.

Species

Angiosperms > Lamiales > Lentibulariaceae > Utricularia

Characteristics

Terrestrial. Rhizoids few, capillary, simple. Stolons capillary, sparsely branched, up to 5 cm long. Foliar organs present at anthesis, sparsely rosulate and on the stolons, flabellate, cuneate or obovate-spathulate to orbicular, with a distinct pseudopetiole, 1.5-3.5 mm wide, up to 2.5 cm long. Traps rather few on the stolons, ovoid, long stalked, c. 0.8 mm long, mouth lateral, upper lip with a relatively large flabellate appendage c. 1 mm long and 2 mm wide including c. 8 marginal subulate multicellular gland-tipped processes. Inflorescence erect, up to 8 cm long; peduncle filiform, terete, glabrous; flowers 1-3, ± distant; scales 0 or 1 in the upper part of the peduncle, similar to the bracts; bracts medifixed, ovate, membranous, sparsely glandular, 1.2-1.5 mm long, apex acute, base truncate, apiculate; bracteoles similar but base obliquely truncate; pedicels erect at anthesis, strongly recurved in fruit, 2-4 mm long. Calyx lobes very unequal, papillose, upper ± orbicular, c. 1.5 mm long at anthesis, up to 3 mm long in fruit, apex emarginate, lower much smaller, ovate-oblong, c. 1 mm long, apex truncate or retuse. Corolla white (in Mal.) with a yellow (fide DE WILDE) or brown (fide VAN STEENIS) spot on the palate or pink (in Yunnan, fide HANDEL-MAZZETTI), 4-6 mm long, upper lip transversely oblong, cucullate, apex emarginate, much shorter than upper calyx lobe, lower lip flabellate, 4-5 mm wide, 3-lobed, midlobe quadrate or semi-orbicular, side lobes smaller, obliquely and obscurely unequally 2-lobed, palate scarcely raised, shortly fimbriate, spur narrowly cylindrical, apex obtuse, much shorter than the lower lip. Filaments filiform, c. 1 mm long, anther thecae distinct. Ovary globose, c. 0.6 mm long, style very short, stigma lower lip orbicular, upper lip minute, deltoid. Capsule globose, obliquely dorsiventrally compressed, c. 2 mm long, dehiscing by a longitudinal ventral slit. Seeds few, ovoid, c. 0.5 mm long, shortly densely echinate.
More
Probably perennials, terrestrial or lithophytic. Rhizoids capillary, simple. Stolons capillary, branched. Traps on rhizoids and stolons, stalked, ovoid, ca. 1 mm, mouth lateral; appendage 1, dorsal, flabellate, fringed with multicellular stipitate glands. Leaves few, from peduncle base and stolons, long petiolate, glabrous; leaf blade obovate to orbicular, 2-12 × 1-2 mm, membranous, veins dichotomously branched, base attenuate, margin entire, apex rounded. Inflorescences erect, 3-7 mm, 1-flowered, glabrous; peduncle terete, 0.2-0.4 mm thick; scales absent; bracts basisolute, oblong, ca. 1.5 mm, base truncate, margin 2-cleft or erose, apex acute to truncate. Pedicel erect, spreading, or ± recurved, 2-10 mm; bracteoles basisolute, similar to bracts. Calyx lower lobe oblong, much smaller than upper lobe, apex emarginate; upper lobe suborbicular, ca. 2 mm, apex emarginate. Corolla white or pale pink, with a yellow spot at base of lower lip; lower lip 3-lobed, middle lobe much larger than lateral lobes, apex rounded; spur narrowly cylindric, ca. 2 × as long as upper calyx lobe, apex obtuse; palate with a slightly raised rim, fringed with moniliform hairs; upper lip subquadrate, much shorter than upper calyx lobe, apex emarginate. Filaments 0.5-0.7 mm, curved; anther thecae ± distinct. Ovary globose; style very short; stigma lower lip circular, upper lip obsolete. Capsule and seeds not seen. Fl. Jul-Aug.
Life form perennial
Growth form herb
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Sexuality hermaphrodite
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OctNovDec
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Environment

Moist sandy rocky or mossy places in open or low scrub, 2500-3300 m. Fl. Febr.-May.
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Hardiness (USDA) 7-12

Usage

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Cultivation

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Distribution

Utricularia salwinensis world distribution map, present in China, Indonesia, and Viet Nam

Conservation status

Utricularia salwinensis threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:527077-1
WFO ID wfo-0001230110
COL ID 7F4V7
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Utricularia salwinensis