Conium L.

Poison hemlock (en), Cigüe (fr)

Genus

Angiosperms > Apiales > Apiaceae

Characteristics

Herbs, biennial or shortly perennial, slender. Root stout, long-conic. Stem hollow, erect, much-branched above, conspicuously purple-spotted. Leaves petiolate, narrowly sheathing at base; blade 2–3-pinnate, finely dissected. Umbels numerous, terminal and lateral on dichotomous branches; bracts and bracteoles several, often reflexed; rays numerous, ascending; rays numerous, spreading widely. Calyx teeth obsolete. Petals white or yellowish white, obovate or obcordate, apex incurved. Stylopodium low-conic, styles short, reflexed. Fruit ovoid or broad-ovoid, slightly flattened laterally; ribs 5, prominent, all ridged to very narrowly sinuate-winged; vittae small, numerous, completely encircling the seed, usually broken down in mature fruit. Seed face deeply concave or sulcate. Carpophore 2-cleft, at least to middle.
More
Fr broadly ovoid, flattened laterally, barely constricted at the commissure; ribs 5 per mericarp, prominent, often undulate; oil-tubes very small and numerous; carpophore entire; umbels numerous, mostly terminal, often 2–4 together from the uppermost node of the stem; bracts few, ovate to lanceolate; rays numerous; bractlets like the bracts but smaller; sep none; pet white; stylopodium depressed-conic; biennials with large, pinnately decompound lvs. 4, temp. Eurasia, S. Afr.
Glabrous, annual or biennial herb. Lvs 2-4-pinnate; segments broad. Umbels compound, pedunculate; bracts and bracteoles few, entire. Petals white, regular, with entire, obtuse, shortly inflexed apex; calyx teeth 0. Fr. ovoid to subglobose, flattened laterally, not beaked, spineless; commissure narrow; ribs 5 per mericarp, equal, prominent and usually undulate; vittae 0.
Glabrous, biennial herbs up to 2 m. Leaves compound-pinnately divided, with rather fine ultimate segments.
Umbels compound, with well-developed bracts and bracteoles, which are sometimes semi-caducous.
Fruit ovoid to suborbicular, somewhat laterally compressed, with a fairly narrow commissure.
Mericarps with prominent ribs, which are often undulate; vittae 0.
Petals white, usually with a slightly inflexed apex.
Stylopodium depressed; styles short and recurved.
Calyx teeth obsolete.
Life form biennial
Growth form herb
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Sexuality hermaphrodite
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Environment

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Hardiness (USDA) 4-9

Usage

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Edible -
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Cultivation

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Images

Conium unspecified picture

Distribution

Conium world distribution map, present in China, New Zealand, and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:39839-1
WFO ID wfo-4000009137
COL ID 3T9P
BDTFX ID 86208
INPN ID 191084
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Conium

Lower taxons

Conium chaerophylloides Conium divaricatum Conium fontanum Conium maculatum Conium sphaerocarpum Conium hilliburttorum