Romulea rosea Eckl.

Rosy sandcrocus (en), Romulée rose (fr)

Species

Angiosperms > Asparagales > Iridaceae > Romulea

Characteristics

Plants 30-200 mm high. Corm globose or obovoid, 5-15 mm diam., rounded or crested below, tunics woody, split into curved or bent, grooved teeth below. Stem subterranean. Leaves 2 to 12, all evidently basal, terete-filiform or compressed-cylindric, narrowly 4-grooved, 0.5-2.5 mm diam. Peduncles up to 5, semi-terete, recurved but straightening and suberect in fruit; outer bracts greenish or purplish, with narrow, brown-speckled, membranous margins, 12-25 mm long, closely veined (± 8 veins/mm), inner bracts with wide, brown or brown-streaked membranous margins. Flowers magenta, lilac-pink or pink to white with pale yellow to golden-yellow cup, often with violet-blue zone in throat, outer tepals feathered or irregularly marked on reverse; perianth tube funnel-shaped, 2-8 mm long; tepals oblanceolate to elliptic, 10-38 x 3-10 mm. Filaments 3-8 mm long, pilose basally; anthers 3-10 mm long, yellow. Style dividing opposite or above anthers. Capsules oblong or shortly cylindric, 10-15 mm long.
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Slender tufts. Corm c. 1 cm diam., globose, rounded at base where smooth brown tunic splits into acuminate teeth bent to one side. Leaves 10-30 cm × 1-2 mm, rush-like, compressed-cylindrical, narrowly grooved, dark shining green. Scapes hidden by sheathing leaf-bases, 2-4-(10) from each corm, 5-15 cm long, stouter than leaves, semiterete, arched over after flowering; spathe-valves 2, long-persistent, outer longer, greenish with fine brown veins, inner with membranous reddish-brown flecked margins. Flowers lilac-pink, rosy-cerise or magenta, with yellow centre and violet-blue band at throat, 1.5-2 cm long, to 3 cm diam.; tube very short; outer lobes greener on back than inner. Capsules c.   long, short-cylindrical, scapes straightening when capsules mature. Seeds 2 mm long, reddish-brown, globose-triangular.
Plants 3–12(–30) cm. Corm tunicate, 5–15 mm diam.; tunic hard, woody, splitting above and below into acuminate segments, those below bent backward. Stems usually branched below ground level; branches (peduncles) aerial, suberect, becoming falcate, ultimately erect. Leaves (2–)6–9, much exceeding stem; blade 10–30 cm × ca. 1.5 mm. Spathes green or flushed with purple; outer 12–25 mm, margin narrow, membranous; inner margin brown-streaked, broad, membranous. Tepals pink to purple, usually pale yellow in cup, outer pale abaxially, main veins dark green to purple, lanceolate, 13–22 × 3–4 mm; perianth tube 2–3.5 mm; filaments ca. 5 mm; anthers ca. 4 mm; style branching opposite upper 1/3 anthers; branches ca. 2 mm, shorter than anther apices. Capsules 10–15 mm. Seeds ca. 2 mm diam.
Plants 150-600 mm long. Corm sub-globose, with curved acuminate basal teeth bent over a rounded base. Leaves basal, filiform to compressed cylindrical, 0.5-2.5 mm in diam. Bracts greenish or purplish, the inner with wide, brown or brown-streaked membranous margins. Flowers 15-48 mm long, magenta, pink, lilac-pink or white, often with a violet-blue throat, cup pale yellow to orange-yellow, outer segments variously coloured or marked on the backs. Perianth tube 2-8 mm long; segments 10-38 x 3-10 mm. Stamens 7-16 mm long; anthers 3-10 mm long, pale to golden-yellow, subequal to or longer than the filaments. Style 7-18 mm; stigmas below, above or at the anther tips. Capsules on peduncles which curve after flowering and straighten later.
A small herb. It keeps growing from year to year. It arises from a bulb under the ground. The leaves are narrow and linear. They are 30 cm long and grooved. They are like grass. They are very tough. They have a thickened edge and midrib. The base of the leaves sheaths the stem underground. There are up to 4 flowers from each corm. They are on a leaf free stem. The flowers are pink. They are like stars. They are supported by an unequal pair of sword shaped bracts. The fruit is a capsule with 3 sections. It has broad wrinkles. There are 10-30 seeds. The capsule opens widely into 3 blunt leathery lobes.
Perennial herb, geophyte, 0.1-0.4 m high; corm subglobose, with curved acuminate teeth; stem subterranean. Leaves 3-6, usually basal, narrowly 4-grooved. Bracts greenish or purplish, margins hardly visible, membranous. Flowers several, pink to magenta or white, often with a purplish zone around yellow cup; perianth tube 2-8 mm long, funnelshaped; tepals oblanceolate, 10-38 mm long, (sub)acute. Stamens erect; filaments 4-6 mm long, slightly pilose below; anthers 3-10 mm long, pale to golden-yellow. Style 7-18 mm long. Flowering time Apr.-Aug.
Cormous geophyte, 100-400 mm tall, corms round at base. Basal leaves several, narrowly 4-grooved. Flowers pink to purple, sometimes white, with yellow cup. Ripe capsules erect.
Cormous geophyte, 10-40 cm, corms rounded at base with coarse, bent teeth. Basal leaves several. Flowers pink to purple, sometimes white, with yellow cup. Ripe capsules erect.
See profiles for varieties.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.07 - 0.3
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

It is a temperate plant. It grows in pasture.
Light 7-9
Soil humidity 4-6
Soil texture 3-6
Soil acidity -
Soil nutriment -
Hardiness (USDA) 7-11

Usage

CAUTION: The plants have caused infertility and abortion in cattle. The young green fleshy fruit are eaten.
Uses environmental use poison
Edible fruits pods
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

Flower

Romulea rosea flower picture by James (cc-by-sa)
Romulea rosea flower picture by Paula (cc-by-sa)
Romulea rosea flower picture by Vasili Slapik (cc-by-sa)

Distribution

Romulea rosea world distribution map, present in Australia, France, Italy, Norfolk Island, New Zealand, United States of America, and South Africa

Identifiers

LSID urn:lsid:ipni.org:names:440828-1
WFO ID wfo-0000785979
COL ID 6X8P4
BDTFX ID 56334
INPN ID 117922
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Ixia bulbocodium Ixia rosea Romulea rosea Trichonema roseum Ixia fugax Syringodea rosea Bulbocodium roseum Romulea rosea var. chloroleuca Romulea rosea var. celsii

Lower taxons

Romulea rosea var. australis Romulea rosea var. elegans Romulea rosea var. rosea Romulea rosea var. muirii Romulea rosea var. communis