Hypoxis obtusa Burch.

Species

Angiosperms > Asparagales > Hypoxidaceae > Hypoxis

Characteristics

Leaves 5–15, trifarious, shiny green, erect at first soon becoming arcuate to ± straggling, conduplicate at least towards the base, overlapping and sheathing at the base, the sheaths with broad hyaline wings; lamina 10–70 × 0.6–3 cm (width measured when folded blades are spread apart and flattened), linear, gradually tapering to a narrowly acute apex, 35–70-ribbed with ribs uniformly broad and mostly very closely spaced, glabrous on both surfaces, or sometimes thinly loosely strigose-pubescent in young leaves, the margins and abaxial midrib conspicuously very densely matted white strigose, the hairs 3–6-armed (stellate) with ± flattened arms; outermost leaves reduced to membranous sheaths with or without blades, the entire outer surface obscured by a sericeous indumentum soon glabrescent; pseudostem up to 5 cm long and up to 12 mm in diameter.
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Perennial herb, 200-450 mm high; robust, growing singly. Rhizome subglobose, oblong or turbinate, 4-12 x 4-8 mm. Leaves 8-15, well developed at flowering, coriaceous, erect or recurving, arranged one above the other in 3 ranks, rigid, spirally twisting towards apex with age, waxy; blade lanceolate, sometimes linear-lanceolate, 100-700 x 6-30 mm; ribbed, bases sometimes red or purple; almost glabrous or hairy towards base, margins and midrib outlined in white by a thickened band of squat hairs (ciliate); hairs stellate. Flowers: 5-12-flowered, racemose, 2-5 per plant; perianth segments 10-20 x 6-10 mm, ovate-elliptic, yellow; Aug.-Feb. Fruit a capsule, 6-7 x 5-7 mm, opening by a circular slit.
Outer tepals (7)11–18(22) × 4–7.5 mm, lanceolate, ± involute on the margins, somewhat coriaceous, ± densely greyish-white strigose-sericeous to tawny hispid outside; the inner 10–14 × 6–10 mm, broadly elliptic to ovate, ± involute on the margins, membranous, glabrous, or the abaxial midrib strigose-sericeous; the indumentum hairs 3–6-armed (stellate) with one arm strongly developed, ascending and up to c. 5 mm long.
Scapes up to c. 30 cm long, flattened in cross-section and up to 5 mm wide, ± densely white strigose particularly towards the apex and on the margins towards the base, the hairs unequally 3–6-armed (stellate) with 1–2 strongly developed arms directed to the apex and 1–2(4) arms directed to the base.
Perennial geophyte, similar to H. hemerocallidea. Leaves stiff and strongly ribbed, due to the many veins (30-70) close to each other, thickened and raised on upper surface, blade waxy, nearly hairless, margins and midrib outlined in white by a thickened band of squat hairs. Flowering time Aug.-Feb.
Flowers 2–13, erect-ascending, in a raceme-like ± cylindrical arrangement 3–13 cm long; bracts 7–25(30) mm long, subulate to linear-lanceolate; pedicels ascending, the lower ones 5–20 mm long, the upper decreasing in length.
A herb that keeps growing from year to year. It grows 16-50 cm tall. It has a stout rhizome or underground stem. The leaves are stiff and become twisted with age. There are white hairs along the edges.
Seeds black and glossy, 1.3–2 × 1–1.5 mm, ovoid; testa smooth or ± covered in closely-spaced incipient dome-shaped undulations, the cuticle smooth.
Rhizome stout, vertical 4–7 × 3.5–6 cm, turbinate to ± cylindrical, equatorially ringed by stout contractile roots.
Inflorescences 1–4, usually overtopping the arcuate leaves, appearing before the leaves.
Capsule 5–7 mm long and 5–7 mm in diameter, turbinate, circumscissile.
Filaments 2–5 mm long, narrowly triangular; thecae 5–8 mm long.
Style 1–2 mm long; stigma c. 3 mm long.
Perennial herb 16–50 cm tall.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
Pollination entomogamy
Spread -
Mature width (meter) -
Mature height (meter) 0.18 - 0.48
Root system rhizome
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Scattered tree grassland; swamp edge; open dry grasslands; dambo margins; mixed deciduous woodlands; sandy soil; short-thicket-grown sandy hills, with clayey subsoil; at elevations from 1,000-2,750 metres.
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It is a subtropical plant. It grows between 1,000-1,830 m above sea level. It grows in open grassland. In Melbourne Botanical Gardens.
Light -
Soil humidity 1-3
Soil texture 7-8
Soil acidity -
Soil nutriment -
Hardiness (USDA) 8-12

Usage

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

Cultivation

Can be grown by seedlings.
Mode seedlings
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Hypoxis obtusa unspecified picture

Distribution

Hypoxis obtusa world distribution map, present in Angola, Botswana, Kenya, Lesotho, Namibia, eSwatini, Tanzania, United Republic of, Uganda, South Africa, and Zimbabwe

Identifiers

LSID urn:lsid:ipni.org:names:65504-1
WFO ID wfo-0000670082
COL ID 3P265
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Hypoxis nitida Hypoxis obtusa Hypoxis angolensis Hypoxis iridifolia Hypoxis villosa var. obtusa Hypoxis obtusa var. chrysotricha