Cyperus diffusus Vahl

Dwarf umbrella grass (en)

Species

Angiosperms > Poales > Cyperaceae > Cyperus

Characteristics

Perennials. Rhizomes short, hardened. Culms 25-80 cm tall, slightly thick, triquetrous, smooth, several leaved at basal part. Leaves equaling or shorter than culm; sheath pale green and eventually reddish brown; leaf blade 0.3-2 cm wide, flat, margin scabrous. Involucral bracts 6-12, leaflike, longer than inflorescence, 0.6-1.6(-1.9) cm wide. Inflorescence a decompound anthela; rays many, mostly 12-16 cm, each with 2-8 raylets. Spikelets 1-5, sessile, sometimes more than 3 at apex of raylets or tertiary raylets, oblong to linear-oblong, 3-7(-14) × 1.5-2 mm, slightly turgid, 6-12(-22)-flowered; rachilla narrowly winged. Glumes reddish brown or rusty brown on both surfaces but middle abaxially green or grayish green, lax, broadly ovate to orbicular-ovate, ca. 2 mm, 7-11-veined, keel prominent, apex rounded and with recurved mucro. Stamens 3; anthers linear, apex with white setae. Style very short; stigmas 3. Nutlet dark brown, ellipsoid, ca. 3/4 as long as subtending glume, 3-sided. Fl. and fr. Jun-Sep.
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Plants perennial from short rootstocks; culms 30-60 cm. long, the base bulb-ous; leaves numerous, 4-12 mm. wide; bracts 4-10, long and leaf-like; inflorescence compound, the spikelets on long spreading rays, few or numerous, 1-2 cm. long, 10-to 24-flowered, greenish; scales truncate, with an incurving mucro; achene obovate, 1.5 mm. long, trigonous with concave sides, dark lucid brown, smooth.
A sedge. These grow in clumps and have grass like leaves and solid stalks. It keeps growing from year to year. It grows 25-75 cm tall. The roots are reddish brown. The leaves grow from near the base. The flowers are in an irregular group with a ring of large leaf like bracts. These are unequal and can be 5-35 cm across. The fruit are 3 sided.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.25 - 0.75
Root system rhizome
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months -
Fruit color -
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway -

Environment

Thickets and moist forests on river banks, shady roadsides; at elevations up to 700 metres. Forests in valleys, grasslands on mountain slopes, wet places by rivers, along trails, paddy fields; at elevations from 100-1,700 metres in China.
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A tropical plant. In Java it grows up to 800 m above sea level. It is often in shade and near water.
Light 4-9
Soil humidity 3-9
Soil texture 3-4
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-11

Usage

Young plants with the root removed and cooked and eaten.
Uses food medicinal
Edible roots stems tubers
Therapeutic use Lip (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by seedlings.
Mode seedlings
Germination duration (days) 25 - 30
Germination temperacture (C°) 21 - 23
Germination luminosity -
Germination treatment -
Minimum temperature (C°) 1
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Cyperus diffusus unspecified picture

Distribution

Cyperus diffusus world distribution map, present in Andorra, Argentina, Bangladesh, China, Indonesia, India, Lao People's Democratic Republic, Moldova (Republic of), Myanmar, Nepal, Panama, Solomon Islands, Thailand, Taiwan, Province of China, and Viet Nam

Conservation status

Cyperus diffusus threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:304313-1
WFO ID wfo-0000371731
COL ID 33C3C
BDTFX ID -
INPN ID 706158
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Cyperus scirpoides Eucyperus diffusus Cyperus diffusus Cyperus bancanus var. brevibracteatus Cyperus diffusus subsp. bancanus Cyperus diffusus var. brevibracteatus Cyperus diffusus var. celebicus Cyperus diffusus var. macrostachyus Cyperus holophyllus var. celebicus

Lower taxons

Cyperus diffusus var. diffusus