Helichrysum arenicola M.D.Hend.

Species

Angiosperms > Asterales > Asteraceae > Helichrysum

Characteristics

Low-growing annual or short-lived (?) perennial with a long woody taproot, branches many from the crown, mostly 50-200 mm long, prostrate or suberect, slender, subsimple or much branched in upper half, thinly white-woolly, glabrescent, leafy. Leaves 4-13 x 1(-2) mm, linear-oblong, narrowed in upper two thirds, obtuse, margins revolute, lower third broadened, half-clasping, margins flat, both surfaces glandular, thinly woolly-cobwebby, glabrescent. Heads homogamous, campanulate, ±3 x 2 mm, several in tight clusters up to 10 mm diam. at the branch tips closely surrounded by reduced leaves and webbed to them with wool, old clusters overtopped by several younger flowering branchlets. Involucral bracts in 3 series, subequal, equalling flowers, not radiating, pellucid, yellow or straw-coloured, glossy, tips obtuse, erose, soon caducous. Receptacle with flattened tubercles. Flowers 16-28, yellow. Achenes 0.75 mm long, elliptic, glabrous or with myxogenic duplex hairs. Pappus bristles many, equalling corolla, scabrid, bases with patent cilia not cohering. Probably flowers in any month, but most records are in spring (August to November) with others in December, February, March and May.
More
Annual or short-lived perennial herb, up to 200 mm high; low-growing, stems many from crown, procumbent or suberect, slender, subsimple or much branched in upper half, thinly white-woolly, glabrescent, leafy. Leaves: blade linear-oblong, 4-13 x 1(-2) mm, narrowed in upper 2/3, apex obtuse, margins revolute, lower 1/3 broadened, base half-clasping, margins flat; both surfaces glandular, thinly woolly cobwebby, glabrescent. Heads discoid, campanulate, ± 3 x 2 mm, several in tight clusters at branch tips, closely surrounded by reduced leaves and webbed to them with wool, old clusters overtopped by several younger flowering branchlets. Involucral bracts in 3 series, subequal, equalling florets, not radiating, pellucid, yellow or straw-coloured, glossy, tips obtuse, erose, soon caducous, stereome divided. Receptacle epaleate, with flattened tubercles. Flowers: disc florets only, 16-28; corolla narrowly funnel-shaped, yellow; Oct., Nov. Fruit with cypsela (and ovary) glabrous or hairy. Pappus of many barbellate bristles, bases with patent cilia not cohering.
Life form
Growth form herb
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.2
Root system tap-root
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity -
Soil texture 5-6
Soil acidity -
Soil nutriment -
Hardiness (USDA) 8-12

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 arenicola world distribution map, present in Botswana, Namibia, and South Africa

Identifiers

LSID urn:lsid:ipni.org:names:212419-1
WFO ID wfo-0000125223
COL ID 3K6DD
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Helichrysum arenicola Helichrysum rangei