Xyris gerrardii N.E.Br.

Species

Angiosperms > Poales > Xyridaceae > Xyris

Characteristics

Perennial forming clumps of short stout horizontal or ascending rhizomes covered by leaf-sheaths.. Leaves up to 25 cm. long, 0.5–1 mm. wide; sheaths much shorter than blades, gradually dilated towards the base, dark brown with paler margins, smooth, sometimes verrucose below, tapering to a small ligule; lamina linear, flattened, glabrous, longitudinally furrowed, tending to be spirally twisted; apex acute.. Peduncles up to 37 cm. long, 0.2–0.5 mm. in diameter, 2-ridged, particularly above, glabrous; spike ellipsoid to obconical, ± 7 mm. long, 4–5 mm. in diameter; sterile bracts broadly ovate, acute, ± 3 mm. long, 2.5 mm. wide, coriaceous, blackish brown with a broad scarious paler margin, becoming lacerate with age; fertile bracts similar but narrower, keeled towards the apex, mucronate.. Lateral sepals ± 4.5 mm. long, keeled, margins membranous, laciniate, keel finely and bluntly denticulate, often only below, excurrent above in a mucro; corolla yellow, tube ± 4 mm. long, lobes broadly obovate, ± 3 mm. long, 2 mm. wide, entire.. Stamens with filaments ± 0.5 mm. long; anthers 2 mm. long; staminodes bifurcate, each branch with a bunch of long hairs.. Fruit and seeds not seen.. Fig. 1/4.
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Perennial forming clumps of short stout horizontal or ascending rhizomes covered by leaf-sheaths. Leaves up to 25 cm long, 0.5-1 mm wide; sheaths much shorter than blades, gradually dilated towards the base, dark brown with paler margins, smooth, sometimes verrucose below, tapering to a small ligule; lamina linear, flattened, glabrous, longitudinally furrowed, tending to be spirally twisted; apex acute. Peduncles up to 37 cm long, 0.2-0.5 mm in diameter, 2-ridged, particularly above, glabrous; spike ellipsoid to obconical, ±7 mm long, 4-5 mm in diameter; sterile bracts broadly ovate, acute, ±3 mm long, 2.5 mm wide, coriaceous, blackish brown with a broad scarious paler margin, becoming lacerate with age; fertile bracts similar but narrower, keeled towards the apex, mucronate. Lateral sepals ±4.5 mm long, keeled, margins membranous, laciniate, keel finely and bluntly denticulate, often only below, excurrent above in a mucro; corolla yellow, tube ±4 mm long, lobes broadly obovate, ±3 mm long, 2 mm wide, entire. Stamens with filaments ±0.5 mm long; anthers 2 mm long; staminodes bifurcate, each branch with a bunch of long hairs. Fruit and seeds not seen.
Tufted perennials up to c. 0.3 m tall; rhizome hard, compact, densely covered with dark, hard shiny sheathing leaf-bases and cataphylls up to c. 50 mm long; roots thin. Leaves grass-like, numerous, linear, 0.35 m long and 1 mm wide, soft, thin. Spikes on long thin peduncles up to c. 0.55 m long; ellipsoid to obovoid, 5-8-flowered, up to 7.5 mm long and 5 mm in diam. Bracts strongly carinate above, acute, 5-7 mm long, dark shiny brown with a broad scarious margin, lacerate with age. Flowers: several often flowering simultaneously on one spike. Lateral sepals obovate-attenuate, keeled, keel not winged, fringed with a short distinct puberulence, especially medially, rarely glabrous. Calyptriform sepal deep orange-red. Petals yellow, lobes rotundate, coarsely dentate. Stamens and staminodes typical. Stigmas dilated, fimbriate. Capsule oblong-ovoid, c. 4 mm long; seeds typical.
Tufted, perennial herb, up to 300 mm high. Leaves clustered on compact rhizomes; blade linear, flat, soft; bases dark brown, persistent. Flowers: heads obovoid, flattened at tip, 6-8-flowered; bracts blackish brown; lower bracts larger, terminating in scarcely projecting sharp points; bract margins papery, splitting, appearing raggedly toothed; keels of lateral sepals with fine hairs and blunt teeth; Nov.-Jan.
Tufted, perennial herb, up to 300 mm tall. Leaves clustered on compact rhizomes, linear. Spikes ellipsoid to obovoid, ± 6-flowered. Lower bracts larger than upper. Bracts with scarious splitting margins. Flowers yellow.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.3
Root system rhizome
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity 4-6
Soil texture -
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 -

Distribution

Xyris gerrardii world distribution map, present in Mozambique, Tanzania, United Republic of, South Africa, and Zimbabwe

Identifiers

LSID urn:lsid:ipni.org:names:871477-1
WFO ID wfo-0000611040
COL ID 5CPJW
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Xyris gerrardii