WorldFloraDB - Holosteum

Characteristics

Herbs, annual or winter-annual. Taproots slender. Stems ascending to erect, simple or branched, terete. Leaves forming basal rosette, connate proximally into sheath, petiolate (proximal leaves) or sessile (cauline leaves); blade 1-veined, oblanceolate to spatulate (proximal leaves) or elliptic to ovate (cauline leaves), somewhat succulent, apex acute. Inflorescences terminal, umbellate cymes, sometimes not yet developed in young individuals, then with 2-4 bracts and often buds at base of pedicel; bracts clustered, foliaceous with scarious margins to entirely scarious. Pedicels reflexed after flowering, erect in fruit. Flowers bisexual or occasionally unisexual and pistillate; perianth and androecium hypogynous; sepals 5, distinct, green, lanceolate to ovate, 2.5-4.5 mm, herbaceous, margins white, scarious, apex acute to obtuse, not hooded; petals 5, white to pink, clawed, blade apex jagged but not 2-fid; nectaries not apparent; stamens 3-5, arising from base of ovary; filaments distinct nearly to base; staminodes absent; styles 3(-5), clavate to filiform, 0.5-1.5 mm, glabrous proximally; stigmas 3(-5), subterminal to linear along adaxial surface of styles, minutely papillate (50×). Capsules ovoid to cylindric, opening by 6 (rarely 8 or 10) revolute teeth; carpophore absent. Seeds 35-60, orange to brown, oblong, shield-shaped, dorsiventrally compressed, papillate, marginal wing absent, appendage absent; embryo central, straight. x = 10.

More

Herbs, annual or short-lived perennial, with slender taproot. Stems ascending to erect, simple or branched, terete. Leaves forming basal rosette, connate near base to form a sheath, petiolate (proximal/lower leaves) to sessile (cauline/upper leaves); lamina oblanceolate to spathulate (lower leaves) or elliptic to ovate (upper leaves), somewhat fleshy, 1-veined, apex acute; stipules absent. Inflorescences terminal, umbellate cymes; bracts clustered, leafy; pedicels reflexed after flowering but erect in fruit. Flowers bisexual or occasionally unisexual; sepals 5, green with white, scarious margin; petals 5, white to pink, clawed, apex jagged/irregularly toothed; nectaries not apparent; stamens 3–5 (or 8–10); stigmas 3 (–5). Capsules ovoid to cylindric, opening by 6 (rarely 8 or 10) revolute teeth. Seeds numerous, shield-shaped, dorsiventrally compressed, orange to brown, papillate, without marginal wing or appendage.

Annual rosette herbs. Hairs glandular, or 0. Lvs opposite, exstipulate. Infl. a few-flowered terminal umbel; bracts leaflike with scarious margins; epicalyx 0. Sepals 5, free. Petals 5, white, irregularly toothed; coronal scales 0. Stamens 3-10. Styles 3-(5). Fr. a narrow-ovoid to cylindric capsule, dehiscing by twice as many teeth as the styles, sessile. Seeds many, flattened, papillate, stalked on 1 face, not winged.

Herbs annual. Stems ascending to erect. Leaves oblanceolate to elliptic; stipules absent. Inflorescences terminal, umbellate; bracts immediately subtending calyx absent. Sepals 5. Petals 5, irregularly toothed. Stamens 3--5(or 8--10). Ovary 1-loculed; ovules numerous; styles 3(4 or 5). Capsule cylindric, opening by 6(or 8 or 10) revolute teeth. Seeds numerous, dorsiventrally compressed, rugulose; embryo straight.

Fls in terminal, pedunculate, cymose umbels; sep 5; pet 5, irregularly erose-fimbriate at the tip; stamens 3–10; styles 3; capsule thin-walled, ± cylindric, many-seeded, opening by 6 valves or apical teeth; seeds compressed, rough, attached by the inner face; annual or biennial herbs without stipules. 6, temp. Eurasia.

Life form	annual
Growth form	herb
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Sexuality	hermaphrodite
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Root system	tap-root
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Environment

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Usage

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Cultivation

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