Tragopogon dubius Scop.

Yellow goat's-beard (en), Salsifis pâle (fr), Salsifis douteux (fr), Grand salsifis (fr)

Species

Angiosperms > Asterales > Asteraceae > Tragopogon

Characteristics

Annual or biennial to c. 0.8 m high, sparsely branched, transiently woolly on newer growth, not glaucous. Leaves linear with parallel venation, entire, sheathing at base. Capitula with region of caducous wool at very base, with minute stubble persisting; involucre c. 25–35 mm long, increasing to up to 60 mm long at maturity, c. 6–12 mm diam.; bracts mostly 8–12, with hyaline margin vestigial or proximally distinct in alternate bracts, not becoming hardened, finally reflexed. Florets: ligule c. half as long as bracts, yellow; style hairs pale. Achenes 25–35 mm long, homomorphic except for rib ornamentation; body fusiform, 10–15 mm long, light to mid brown, with coarse tubercles on ribs, with tubercle size reducing inwards, with transition into beak gradual; beak ± as long as body, with sub-terminal dilation 0.5–1 mm long. Pappus 25–35 mm long, cream, or grey-cream, homomorphic.
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Biennial with cylindric rootstock. Stems erect, weakly ribbed, glabrous, 30-80 cm tall. Lvs linear to lanceolate-subulate, entire, acuminate, 5-20 × 0.5-1.5 cm; base sheathing; margins undulate or flat. Capitula solitary; peduncles swollen beneath capitula (> 5 mm thick at fruiting). Involucre with a band of sparse minute crisped hairs at base; involucral bracts c. 8, lanceolate-acuminate, 4-6 × 0.5-1 cm at fruiting, glabrous or with fine tomentum near apex. Corolla yellow, < involucre. Achenes fusiform, ribbed, the outer coarsely muricate to spinulose, the inner almost smooth; body 12-15 mm long; beak 1-1.5× length of body, distinctly clavate at apex. Pappus sordid, 2-2.5-(3) cm long, plumose, in 2 rows, seated on a distinct tomentose annulus.
Biennial herb up to 1 m tall, sparingly branched from the base, stems thick (up to 6 mm diam.), loosely white woolly at first, soon glabrous, or wisps persisting at the leaf bases, leafy throughout. Leaves grass-like, up to c. 25 x 1.5 cm, linear-lanceolate, long-acuminate, base broad, half-clasping, margins entire, glabrous or with white wool in the leaf axils. Heads 8-12 cm across in fruit, solitary on long peduncles much inflated at the top. Involucral bracts (8-)13(-17), lanceolate-acuminate, 5-6 cm long in fruiting heads. Flowers yellow, shorter than the involucre. Achenes up to 3.5 cm including the beak, body of the achene strongly muricate on the ribs. Pappus of whitish plumose bristles.
Herbs 40-80(-100) cm tall, biennial. Stem erect, simple or branched from lower or middle third, glabrous. Basal and lower cauline leaves lanceolate to linear, 15-40 × 0.3-0.5 cm. Capitula solitary to few; peduncle inflated, 7-10 mm in diam. Involucre 4-5.5 cm at anthesis, to 7 cm in fruit. Phyllaries 8-12(-14), longer than florets, equaling or longer than achenes with pappus. Ligules yellow. Outer achenes 2.2-3 cm; body pale brown, ± curviform, 1.4-1.7 mm in diam., with 5 fairly well-differentiated ribs, tuberculate; beak whitish, 1.2-1.6 cm, slender, non-tuberculate or toothed, apically inflated; pappus disk pubescent. Pappus dirty white, 2.2-2.8 cm. Fl. and fr. Apr-Jun. 2n = 12.
Biennial herb, up to 1 m high; with milky latex, loosely white-woolly at first, soon glabrous, or wisps of wool persisting at leaf bases. Leaves alternate, sessile; blade grass-like, linear, apex long acuminate, base broad, half-clasping, margins entire, glabrous or with white wool in leaf axils. Heads ligulate, solitary, long pedunculate. Involucral bracts uniseriate, usually (8-)13(-17), subconnate at base. Receptacle epaleate. Flowers: ligules shorter than involucral bracts, yellow; Nov.-Mar. Fruit with cypsela fusiform, terete, ribs muricate, narrowed upwards into long beak. Pappus of plumose bristles.
Grass-like, biennial herb, up to 1 m high, with milky latex. Leaves alternate, linear-lanceolate, long acuminate, base broad, amplexicaul, margins entire, glabrous or with white wool in leaf axils. Capitula ligulate, solitary, terminal, long pedunculate; involucral bracts in 1 row, usually 13, sometimes more, occasionally 8. Florets yellow, corolla shorter than involucral bracts. Flowering time Sept.-Jan. Pappus of plumose bristles. Cypselae fusiform, strongly ribbed and muricate, narrowed upwards into a long beak.
A herb that takes 2 years to complete its life cycle. It is like a large dandelion. In grows 20-60 cm tall. It is very similar to Salsify except it has yellow flowers. The flower stalks are strongly inflated below the flower heads. There are 8-12 flower bracts. The flower heads occur singly and are 3-5 cm across. The fruit is a narrow long-beaked achene.
Plants (30–)40–80(–100) cm. Leaves: apices straight (not recurved to coiled), faces initially tomentulose to floccose, soon glabrescent. Peduncles distally inflated. Involucres conic in bud. Outer florets much shorter than phyllaries; corollas yellow. 2n = 12.
Biennial herb, up to 1 m high. Involucral bracts usually 13, sometimes more, occasionally 8. Achenes all with plumose pappus bristles. Flowers yellow.
Life form
Growth form herb
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
Pollination entomogamy
Spread anemochory
Mature width (meter) 1.0
Mature height (meter) 0.9
Root system -
Rooting depth (meter) 0.2
Root diameter (meter) 0.4
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway c3

Environment

It is a temperate plant. It grows in dry woodland and rough grassy places. In western China it grows on stony steppes and grassy slopes at the base of mountains between 500-2,000 m above sea level. In Argentina it grows from sea level to 1,000 m above sea level.
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Grows in loam or clay soils in disturbed sites such as roadsides.
Fields in Turkey, 400-1840 metres.
Light 6-8
Soil humidity 2-5
Soil texture 1-6
Soil acidity 4-7
Soil nutriment -
Hardiness (USDA) 4-8

Usage

The young stems and bases of the lower leaves are used as a potherb. The very young roots are eaten raw or cooked. The milky sap is used as a chewing gum.
Uses food gum medicinal potherb
Edible flowers leaves roots stems
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

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

Images

Habit

Tragopogon dubius habit picture by did_21 (cc-by-sa)
Tragopogon dubius habit picture by jeclerencia (cc-by-sa)
Tragopogon dubius habit picture by jeclerencia (cc-by-sa)

Leaf

Tragopogon dubius leaf picture by figliodellabarba (cc-by-sa)
Tragopogon dubius leaf picture by did_21 (cc-by-sa)
Tragopogon dubius leaf picture by co pa (cc-by-sa)

Flower

Tragopogon dubius flower picture by figliodellabarba (cc-by-sa)
Tragopogon dubius flower picture by Georges Olioso (cc-by-sa)
Tragopogon dubius flower picture by Daniel Roll (cc-by-sa)

Fruit

Tragopogon dubius fruit picture by Didier Desmazure (cc-by-sa)
Tragopogon dubius fruit picture by Lucie (cc-by-sa)
Tragopogon dubius fruit picture by Patrick Carteret (cc-by-sa)

Distribution

Tragopogon dubius world distribution map, present in Afghanistan, Australia, Canada, China, France, India, New Zealand, Pakistan, Sudan, United States of America, and South Africa

Identifiers

LSID urn:lsid:ipni.org:names:255993-1
WFO ID wfo-0000122592
COL ID 57WGC
BDTFX ID 68729
INPN ID 127005
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Tragopogon dubius

Lower taxons

Tragopogon dubius subsp. desertorum Tragopogon dubius subsp. major Tragopogon dubius subsp. dubius