Pseudognaphalium oligandrum (Dc.) Hilliard & B.L.Burtt

Species

Angiosperms > Asterales > Asteraceae > Pseudognaphalium

Characteristics

Annual herb, stiffly erect, 0.4–1 m high, becoming slightly woody at base; stems simple or branching from base, white-woolly, glabrescent on older parts.. Leaves discolorous, green above, grey or whitish beneath, oblong to lanceolate, 1–8 cm long, 0.3–0.8 cm wide, base broad and ± cordate-clasping, occasionally decurrent for up to 3 mm, margins entire and often slightly undulate, apex acute, sparsely pubescent and glandular above, white-felted beneath.. Capitula 3–5 mm long, whitish, sessile, several together in tight clusters, these in turn arranged in a large corymbose panicle 1.5–15 cm across; receptacle shortly honeycombed; phyllaries in ± 4 series, imbricate, proximally green, distally (lamina) white, oblong to lanceolate,3–4 mm long, acute or obtuse, stereome undivided, the outer 2 series lanate.. Outer florets yellow, > 100, tube filiform, 1.8–2.3 mm long, lobes < 0.1 mm long, style included or very briefly exserted, briefly divided; inner florets yellow, 10–30, tube cylindrical, 1.5–1.8 mm long, lobes 0.1–0.2 mm long and glabrous; anthers 0.8–0.9 mm long, briefly caudate, with a short triangular distal appendage, style 2 mm long.. Achenes ellipsoid, 0.4–0.5 mm long, glabrous; pappus of many white bristles, 1.5–2.5 mm long, cohering at base by cilia.
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Annual herb, stems simple or branching from the base, stiffly erect to c. 1 m, branching above into the compound inflorescence, loosely white-woolly, closely leafy. Leaves up to 80 x 4(-8) mm, oblong, oblong-lanceolate or lanceolate, apex subacute to acute, base broad, more or less cordate-clasping, scarcely decurrent, margins entire, often somewhat undulate, upper surface glandular, green drying brown, lower white-felted. Heads c. 4 mm long, broadly campanulate, several together in tight clusters, these arranged in a large corymbose panicle. Involucral bracts in c. 4 series, imbricate, innermost slightly exceeding the flowers, stereome undivided, lamina whitish, the outer 2 series white-woolly on the backs. Receptacle shortly honeycombed. Flowers c. 381-1118 cm our area, 135-415 ('female'), 10-30 ('bisexual'). Achenes c. 0.5 mm long, glabrous. Pappus bristles many, scabrid, bases cohering lightly by patent cilia. Flowering mainly between December and May, but as early as September.
Annual herb, up to 1 m high, erect. Leaves alternate, sessile; blade oblong, oblong-linear or linear, apex acute or subacute, main stem leaves not decurrent, at most base cordate-clasping; upper surface glandular, green, drying brown, lower surface white-felted, discolorous. Heads disciform, with up to at least 145 flowers, several in tight clusters, arranged in corymbose panicles. Involucral bracts ± 4-seriate, whitish, outer 2 rows white-woolly on backs, stereome undivided. Flowers: outer female florets many, filiform; disc florets few; whitish or yellow; Oct.-May. Fruit with cypsela ellipsoid, glabrous. Pappus of many barbellate bristles.
Erect, white-woolly, annual herb, up to 1 m high. Leaves alternate, sessile, oblong, oblong-lanceolate or lanceolate, apex subacute to acute, base cordate-clasping, not decurrent, margins entire, upper surface glandular, lower surface white-felted, discolorous. Capitula disciform, several together in tight clusters arranged in a large, corymbose panicle; involucral bracts whitish. Outer florets female, filiform, more than disc florets, yellowish. Disc florets tubular, yellowish. Flowering time Jan.-Mar. Pappus of barbellate bristles. Cypselae oblong, glabrous.
Annual herb, up to 1 m high. Leaves oblong, oblong-lanceolate or lanceolate, apex subacute to acute, base cordate-clasping, not decurrent, discolorous. Flowers whitish.
Life form annual
Growth form herb
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 1.0
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity 1-3
Soil texture 5-6
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-12

Usage

Uses -
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 -

Images

Pseudognaphalium oligandrum unspecified picture

Distribution

Pseudognaphalium oligandrum world distribution map, present in Angola, Botswana, Cameroon, Eritrea, Ethiopia, Lesotho, Madagascar, Mozambique, Malawi, Namibia, Rwanda, Sudan, eSwatini, South Africa, Zambia, and Zimbabwe

Identifiers

LSID urn:lsid:ipni.org:names:909627-1
WFO ID wfo-0000005683
COL ID 4NXF5
BDTFX ID 31403
INPN ID 101100
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Anaphalis oligandra Gnaphalium oligandrum Pseudognaphalium oligandrum Helichrysum steudelii Gnaphalium steudelii