Practical ecological knowledge for the temperate reader.

Conioselinum gmelinii - Pacific Hemlock-parsley

Family: Apiaceae - Carrot Family [E-flora]

"Conioselinum pacificum is a PERENNIAL. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Insects.
Suitable for: light (sandy) and medium (loamy) soils. Suitable pH: acid, neutral and basic (alkaline) soils and can grow in very alkaline and saline soils.
It cannot grow in the shade. It prefers moist soil." [PFAF]

"General: Glabrous perennial herb from a short, stout rhizomatous stem-base with a cluster of fleshy roots or a taproot, sometimes glaucous; stems solitary, 0.2-1.2 m tall." [IFBC-E-flora]
"Leaves: Stem leaves egg-shaped to deltoid in outline, 2-4 times pinnately dissected, with lobed or cleft leaflets; leaflet stalks sheathing at base, the blades 15-30 cm long." [IFBC-E-flora]
"Flowers: Inflorescence of 1 or more compound umbels; flowers white, small, numerous in 8-30 small, compact heads; involucral bracts linear, 1-few or lacking." [IFBC-E-flora]
"Fruits: Oblong-oval, 5.0-8.5 mm long, glabrous, ribbed, the lateral ribs with broad, thin wings." [IFBC-E-flora]

"Habitat / Range Moist to mesic coastal bluffs, sandy beaches, tidal marshes and bog woodlands in the lowland zone; common along the coast in BC; N to AK and S to CA." [IFBC-E-flora]

Origin Status: Native [E-flora]

Edible Uses

Medicinal Uses


"When a person felt generally weak, a sweat bath was set up, consisting of red hot stones covered with layers of Fucus, Conioselinum leaves, and yellow cedar tips (Chamaecyparis noothatensis). Salt water was poured on, and the patient lay down on the yellow cedar, covered with a blanket. After a steam bath, he was rubbed with four pieces of softened yellow cedar bark. These were taken to dry under the trees from which the tips were taken. It was hoped that the disease would dry up with the bark (Boas, 1966)." [Turner&Bell2]

Cultivation & Propagation

"Seed - we have no information for this species but suggest sowing the seed as soon as it is ripe if possible. Sow stored seed in early spring. As soon as they are large enough to handle, prick out the young seedlings into individual pots and plant them out once they are 20cm or more tall. Division of the rootstock in the spring. Divisions can be planted out straight into their permanent positions." [PFAF]

"We have very little information on this species and do not know if it will be hardy in Britain. However, judging by its native range it is likely to be hardy in all parts of the country and, judging by its native habitat, is likely to require a well-drained soil and a sunny position. It is also likely to be tolerant of saline soils[K]. One report says that the correct name for this species is C. gmelinii[257]." [PFAF]



Conioselinum Sp.

"Perennial herb, taprooted or short-rhizomed, glabrous or ± scabrous in inflorescence. Stem: erect, branched. Leaf: blade ovate to widely triangular, 1–4-pinnately or -ternate-pinnately dissected or compound; segments or leaflets toothed or lobed to deeply cut; sheaths conspicuously dilated. Inflorescence: umbels compound; bracts generally 0; bractlets generally present, ± scarious; rays, pedicels many, spreading-ascending. Flower: calyx lobes 0 or minute; petals wide, white, tip notched. Fruit: oblong to ovate, compressed front-to-back; marginal ribs thin-winged, wide, abaxial low, corky, or all ribs winged; oil tubes 1–4 per rib-interval; fruit axis divided to base. Seed: face flat or ± concave.
± 10 species: North America, Eurasia. (Combined generic names Conium + Selinum)" [Jepson]

Local Species;

  1. Conioselinum gmelinii - Pacific hemlock-parsley [E-flora]

Uses of Other, Non-local Sp.

Conioselinum chinense (L.) Britt., Sternset Pogg.Family: Apiaceae Aerial Part - Essential oil, % dry wt: 0.38 Fruit - Essential oil, % dry wt: 0.89 Root(with rhizome) - Essential oil, % dry wt: 0.62 [LEE]

"Conioselinum scopulorum Coult. and Rose (Apiaceae). Rocky Mountain hemlock parsley. The Kayenta Navajo of North America smoked the plant to treat catarrh (Wyman and Harris 1951)." [UAPDS]

Conioselinum tataricum Hoffm. Family: Apiaceae Essential oil, % dry wt: 1.3 Aerial Part - Essential oil, % dry wt: 0.08–0.27 Fruit - Essential oil, % dry wt: 0.34–0.43 [LEE]

Conioselinum univittatum Turcz. - Gong Chong - (root) Essential oil.49 - Emmenagogue, sedative [CRNAH]


  1. [Jepson] 2013. Conioselinum, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Jan 28 2015
  2. [LEE] A.I. Glushenkova (ed.), Lipids, Lipophilic Components and Essential Oils from Plant Sources, DOI 10.1007/978-0-85729-323-7, # Springer Science+Business Media, LLC 2012

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