Stylidium tenellum Sw. ex Willd.

Species

Angiosperms > Asterales > Stylidiaceae > Stylidium

Characteristics

Herbs 5-20[-27] cm tall, annual. Stems slender, simple or laxly dichotomously branched, glabrous. Leaves alternate, sessile or subsessile; leaf blade oblong-obovate to oblanceolate, 6-10 mm, apical ones smaller and grading into bracts, glabrous, veins 3, base cuneate, margin entire, apex obtuse. Inflorescences dichotomously branched lax spikes or with flowers solitary; scapes absent; bracts linear, ca. 2 mm. Flowers sessile. Calyx tube (hypanthium) linear, with sparse glandular trichomes or glabrous; lobes partly connate, with 3 distinct and 2 connate into a shallowly 2-lobed segment. Corolla white or rose-purple, less than 2 mm, with sparse glandular trichomes; tube slightly longer than calyx lobes; throat appendages minute; labellum minute, subulate; lower pair of lobes longer than upper pair, lobe apices shallowly 2-lobed. Gynostemium 4-5 mm. Capsule thinly columnar, to 2 cm. Fl. and fr. Oct.
More
Annual, erect, 5-20 cm high. Stem simple or very sparingly dichotomously branched, glabrous, with a few leaves only. Leaves scattered, (sub)sessile, (oblong-)obovate, blunt, the lower leaves somewhat rosulate and 10 mm long at the utmost, the upper ones smaller and gradually passing into the linear bracts. Inflorescences composed of 2-3 flowers or subdichotomously branched. Flowers very small, sessile. Calyx thinly sprinkled with glandular hairs or glabrous; tube (ovary) very narrow, about 10 mm long; two of the segments connate into a slightly bifid lobe. Corolla very small, white (or violet?), very sparingly glandular hairy; tube hardly longer than the calyx lobes; appendages of the throat minute though distinct; segments free, the posterior ones bifid, the anterior segments much smaller; labellum very small, subulate. Capsule linear, up to 2 cm long.
Life form annual
Growth form herb
Growth support free-standing
Foliage retention -
Sexuality -
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.05 - 0.15
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway -

Environment

Rare, found twice in Sumatra: once in Tapanuli in a swamp, 1100 m, and once in the Padang Uplands in rice-fields, 800 m.
Light -
Soil humidity 7-9
Soil texture 5-6
Soil acidity -
Soil nutriment -
Hardiness (USDA) 8-12

Usage

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

Cultivation

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

Distribution

Stylidium tenellum world distribution map, present in Australia, Bangladesh, China, Indonesia, India, Iceland, Cambodia, Lao People's Democratic Republic, Myanmar, Malaysia, Thailand, and Viet Nam

Identifiers

LSID urn:lsid:ipni.org:names:826236-1
WFO ID wfo-0001041953
COL ID 539H5
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Stylidium roseum Stylidium tenellum