Pteronia lucilioides Dc.

Species

Angiosperms > Asterales > Asteraceae > Pteronia

Characteristics

Erect, intricately branched shrub, to 25 cm tall. Stems pale tan or pale grey, lower layers white, farinose, bark on older stems dark grey, longitudinally fissured, leaf scars conspicuous, spiny remains of parts connecting opposite leaves most conspicuous near branch tips. Leaves decussate-imbricate, densely arranged at branch tips, less imbricate on flowering branches, dehiscent at base of branches, somewhat fleshy, surface minutely papillose, margins ciliate-pectinate, more so towards leaf apex, sometimes abaxial keel pectinate at apex, narrowly oblong to linear-lanceolate, apex obtuse, boat-shaped, convex beneath, midrib indented on slightly concave adaxial surface, 4-5 x 1-1.5 mm; apex obtuse; base sessile, somewhat connate, with spinules between bases of opposite leaves. Capitula solitary, terminal, obconical to ovoid, 10-12 x 4-6 mm; apex constricted, truncate in bud. Receptacle epaleate. Phyllaries multiseriate, gradate, spirally arranged, c. 20 per capitulum, oblong, 3 x 1.5 mm to 10 x 1 mm, pale yellow-green, shiny, papillose towards apex on abaxial surface; apex of outer acute, of inner truncate; margins undulate, membranous and re?exed at right angles. Florets 5-6; corollas 6.5-7 x 1 mm, short papillate at area where translucent part meets opaque part, pale yellow; lobes narrowly acute, short bristly on outer surface; tube gradually widening towards apex, basal third translucent, rest opaque. Stamens 5, filaments fused to base of corolla. Anthers fused into a tube, about half as long as stamens, bases shortly sagittate, tips acute. Style bifid, branches acute, half the length of style; stigmatic papillae short. Ovary obconical to obtrigonous, densely covered with pale yellow, spherical, sessile glands, densely hirsute. Achenes compressed obconical, densely long, white hirsute and densely covered with golden, spherical, sessile glands, 4.5-5 x 2-2.5 mm. Pappus setae fused at base into a ring, 4-8 mm long, bristles barbellate, of different lengths, from half the length of floret to longer than floret, maroon-purple.
More
A slender, much-branched, glaucous shrub; young branches scabrid-puberulous, at length glabrous. Leaves opposite, free from each other at the base, linear or subspathulate-linear, obtuse, 5-8 mm 1ong, about 1-25 mm broad, very convex below, concave above, coriaceous, densely white scabrid-papillous on both surfaces. Heads terminal, solitary, sessile, acutely acuminate in the bud state, at length oblong-cylindric, 2 cm long, nearly 1 cm in diameter, about 12-flowered. Involucral bracts gradually differentiated from the upper leaves, about 6-seriate, yellow when dry, the outermost oblong-oblanceolate, about 6 mm long and 3 mm broad, finely puberulous down the middle outside, the intermediate ones oblong, 1.2 cm long, 5 mm broad, the innermost linear-oblong, 1.8 cm long, 4 mm broad, all scaly membranous and glabrous. Receptacle 3.5 mm in diameter, deeply honeycombed Corolla-tube 8 mm long, gradually widened upwards, glabrous; lobes lanceolate, subacute, 2 mm long. Anthers 4.5 mm long. Achenes 6 mm long, densely glandular and shortly setose with scattered hairs. Pappus straw-coloured, 1 cm long.
Shrub or dwarf shrub, up to 1 m tall. Leaves opposite, free from each other at base, small, linear or subspathulate-linear, obtuse, densely white-scabrid to papillose. Flowerheads terminal, solitary, acute before opening then oblong-cylindrical; outer involucral bracts oblong-oblanceolate, scaly-membranous and glabrous; disc florets yellow. Cypselas densely glandular-hairy, mixed with scattered short hairs; pappus straw-coloured.
Life form perennial
Growth form shrub
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.63
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity -
Soil texture 5-8
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-12

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

Pteronia lucilioides world distribution map, present in Namibia and South Africa

Identifiers

LSID urn:lsid:ipni.org:names:240276-1
WFO ID wfo-0000042441
COL ID 4PZWX
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Pteronia quadrifaria Pteronia lucilioides Pteronia bromoides Pteronia roesemaniana Pteronia lucilioides var. lucilioides Pteronia lucilioides var. sparsifolia