Helichrysum tenuiculum Dc.

Species

Angiosperms > Asterales > Asteraceae > Helichrysum

Characteristics

Twiggy, rounded shrub up to 2 m high, old branches bare, rough with leaf bases, branchlets white-woolly, closely leafy. Leaves 7-18 x 1-1.5 mm, linear, apex mucronate, acute, hooked, base broad, half-clasping, margins revolute, upper surface with minute, elongated appressed trichomes, later glabrous or nearly so, lower surface white-woolly. Heads heterogamous, campanulate, 4-5 mm long and as much across the radiating bracts, bases woolly, many in compact terminal corymbose clusters 10-20 mm across. Involucral bracts in ±4-5 series, graded, closely imbricate, glossy, outer palest brown often tipped reddish or orange when young, inner about equalling the flowers, tips obtuse, bright canary-yellow, minutely radiating. Receptacle shortly honeycombed. Flowers 27-45, 7-15 female, 19-30 homogamous. Achenes 0.75 mm long, with duplex hairs. Pappus bristles many, equalling corolla, scabrid, bases cohering by patent cilia.
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Tufted, perennial herb or subshrub, stems wiry, branching mostly basally, decumbent and rooting, then ± erect, up to ± 0.5 m high, thinly greyish white-woolly, closely leafy. Leaves mostly 8-35 x 1-5 mm, smaller and fewer upwards, lanceolate or linear-lanceolate, apex acuminate, base broad, ear-clasping, margins ± revolute, thinly white-woolly below. Capitula mostly heterogamous, cylindric or narrowly campanulate, ± 3 x 2 mm, usually in compact, corymbose panicles; involucral bracts in ± 4 series, graded, apex obtuse, translucent, straw-coloured or the inner yellow. Receptacle fimbrils equalling ovaries. Flowers 8-14. Flowering time Jan., Feb. Pappus of many bristles, ± equalling corolla. Cypselae ± 0.5 mm long, barrel-shaped, glabrous.
Straggling, thinly woolly shrub to 1 m. Leaves broadest below, linear-lanceolate to ovate, glabrous or cobwebby above, thinly woolly beneath, margins slightly revolute. Flower heads disciform, sometimes discoid, crowded in terminal corymbs, cylindric, ± 3 x 1 mm, florets 6-20, straw-coloured or tawny above, ovary glabrous.
Life form perennial
Growth form
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 1.25
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity 4-6
Soil texture 7-8
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-11

Usage

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

Cultivation

Mode -
Germination duration (days) 7 - 10
Germination temperacture (C°) 18 - 23
Germination luminosity light
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Distribution

Helichrysum tenuiculum world distribution map, present in South Africa

Identifiers

LSID urn:lsid:ipni.org:names:213421-1
WFO ID wfo-0000119802
COL ID 6LHJC
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Gnaphalium tenuiculum Helichrysum tenuiculum