WorldFloraDB - Silphium integrifolium

Characteristics

Plants caulescent, 40–200 cm; fibrous rooted. Stems terete to slightly square, sparsely scabrous or glabrous (sometimes glaucous). Leaves: basal caducous; cauline opposite, sessile; blades lanceolate to ovate, 2–23 × 0.1–11 cm, bases round to caudate, margins finely serrate or entire, apices acute to acuminate, faces hispid, scabrous, or glabrous. Phyllaries 17–37 in 2–3 series, outer appressed, apices acute to acuminate, abaxial faces glabrous, hispid, pilose, or scabrous, sometimes stipitate-glandular. Ray florets 12–36; corollas yellow. Disc florets 70–225; corollas yellow. Cypselae 9–14 × 6–10 mm; pappi 1–4 mm.

More

Fibrous-rooted from a short rhizome or caudex; stems 5–15 dm; lvs firm, mostly opposite, seldom ternate or alternate, entire or toothed, ovate or lance-ovate to elliptic, mostly 7–15 × 2–6.5 cm, 2–4 times as long as wide, scabrous above, sessile and often clasping; heads relatively large and many-fld, with mostly 16–35 (commonly ca 21 or 34) rays 2–5 cm, the disk mostly 1.5–2.5 cm wide; 2n=14. Prairies and roadsides, less often in open woods; s. Mich. to Neb., s. to Ala., Miss., and Tex. July–Sept. Two vars.:

Life form

perennial

Growth form

herb

Growth support

free-standing

Foliage retention

-

Sexuality

hermaphrodite

Pollination

-

Spread

-

Mature width (meter)

-

Mature height (meter)

0.4 - 2.0

Root system

fibrous-root rhizome

Rooting depth (meter)

1.3

Root diameter (meter)

0.4

Flower color

Blooming months

Jan	Feb	Mar
Apr	May	Jun
Jul	Aug	Sep
Oct	Nov	Dec

Fruit color

-

Fruiting months

-

Nitrogen fixer

-

Photosynthetic pathway

c3

Environment

Light
Soil humidity
Soil texture
Soil acidity
Soil nutriment	-
Hardiness (USDA)

Usage

Uses	medicinal ornamental wood
Edible	seeds
Therapeutic use	Urinary Aid (leaf), Analgesic (root), Herbal Steam (root), Kidney Aid (root), Orthopedic Aid (root)
Human toxicity	-
Animal toxicity	-

Cultivation

Mode	-
Germination duration (days)	84
Germination temperacture (C°)	4
Germination luminosity	-
Germination treatment	-
Minimum temperature (C°)	-29
Optimum temperature (C°)	-
Size	-
Vigor	-
Productivity	-