Helichrysum sessile Dc.

Species

Angiosperms > Asterales > Asteraceae > Helichrysum

Characteristics

A well-branched, very compact cushion-forming dwarf shrublet, 40-100 mm high, old main stems woody, gnarled, up to 15 mm diam., branches densely tufted, clothed below in dead dry leaves, upper leaves closely imbricate, appearing rosetted from above. Leaves ±5-40 x 1-4 mm, narrowly elliptic or oblong, apex subacute to obtuse, both surfaces enveloped in thick white indumentum, surface silky-smooth, drying like crumpled tissue paper, breaking down with age to felt. Heads homogamous, campanulate, ±5-7 x 8-12 mm across the radiating involucral bracts, solitary or 2-12 together on short or long (up to 100 mm) leafy peduncles terminating the branchlets. Involucral bracts in ±4-6 series, loosely imbricate, base woolly, lamina silvery translucent, sometimes crimson above the stereome, tips opaque milk-white, deltoid, acute, radiating, Receptacle scarcely honeycombed. Flowers ±20-38, yellow. Achenes 1.5 mm long, with elongated highly myxogenic duplex hairs. Pappus bristles many, about equalling corolla, scabrid, apical cells thickened, bases cohering by patent cilia.
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Dwarf shrub, 40-100 mm high; very compact, cushion-forming; old stems gnarled, branches densely tufted. Leaves: upper leaves closely imbricate, appearing rosetted; blade narrowly elliptic or oblong, 5-40 x 1-4 mm, apex subacute to obtuse, both sides with thick, white indumentum, surface silky-smooth, drying like crumpled tissue paper, becoming felty. Heads discoid, campanulate, 5-7 x 8-12 mm, solitary or 2-12 on leafy peduncles, terminal. Involucral bracts in 4-6 series, loosely imbricate, base woolly, sometimes crimson on backs, tips opaque milk-white, acute, radiating, stereome divided. Receptacle epaleate, scarcely honeycombed. Flowers: disc florets only, 20-38; corolla narrowly campanulate above, yellow; Dec., Jan. Fruit with cypsela hairy. Pappus of many scabrid bristles, bases cohering by patent cilia.
Very compact, cushion-forming shrublet, 40-100 mm high. Leaves 5-40 x 1-4 mm, narrowly elliptic or oblong, both sides with thick white indumentum, surface silky-smooth, drying-like crumpled tissue paper, becoming felty. Capitula homogamous, campanulate, 3-7 mm long, solitary or 2-12 on leafy peduncles, terminal; involucral bracts in 4-6 series, apex opaque milk-white, radiating. Receptacle ± honeycombed. Flowers 20-38, yellow. Flowering time Dec., Jan. Pappus of scabrid bristles, bases cohering by patent cilia. Cypselae 1.5 mm long, hairy.
Life form -
Growth form shrub
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.04 - 0.1
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light 7-9
Soil humidity 1-4
Soil texture 7-8
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-10

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°) -7
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Distribution

Helichrysum sessile world distribution map, present in South Africa

Identifiers

LSID urn:lsid:ipni.org:names:213323-1
WFO ID wfo-0000133948
COL ID 3K79H
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Gnaphalium ernestianum Helichrysum ernestianum Gnaphalium evaciforme Helichrysum laevigatum Helichrysum sessile