Drosera intermedia Hayne

Spoonleaf sundew (en), Rossolis intermédiaire (fr)

Species

Angiosperms > Caryophyllales > Droseraceae > Drosera

Characteristics

Acaulescent or very short stemmend herb forming a rosette, no more than 3 cm tall. Leaves spathulate, 20-40 mm long, petiole and blade well defined; stipules 2-4 mm long, 3-7-partite; petiole 15-30 x 0.5 mm, hairy beneath; blade obovate, 5-10 x 1.5-3 mm, glabrous or hairy beneath. Inflorescences 1-4 per plant, 5-20 cm long, 3-15-flowered; peduncle erect or curved near base, 3-15 cm long. Flowers with sepals ovate, joined at base or free, 2.5-3 x 1 mm, margin entire; petals white, spathulate, 3-6 x 2-3 mm; stamens 2-5 mm long; pollen tetrad 55-65 µm diameter, spines and spinules well defined, spines 2 µm long, 7-12 µm2; ovary with 3 styles, bipartite near base. Seeds papillose, ellipsoid, papillae arranged irregularly, 0.50-0.55 mm x 0.25-0.30 mm.
More
Stem 1–8 cm, with lvs in a rosette or also at intervals for several cm; petioles 2–5 cm, glabrous; lf-blades oblong-spatulate to obovate, 8–20 cm × 4–5 mm, with long glandular hairs on the upper side; stipules adnate for 1 mm, then breaking into several setaceous segments 2–5 mm; sep 3–4 mm; pet 4–5 mm, white; seeds reddish-brown, oblong, 0.7–1 mm, blunt at the ends, densely and irregularly covered with long papillae; 2n=20. In wet places and shallow water; interruptedly circumboreal, in Amer. from Nf. to Fla., w. to Minn., Ill., Tenn., and Tex. July, Aug. (D. longifolia, in part) Hybridizes with no. 2 [Drosera rotundifolia L.].
Plants forming winter hibernaculae, rosettes 3–6 cm diam. in young plants only; stem base not bulbous-cormose; stem 1–8(–20) cm (other species do not have distinct stem). Leaves erect to spreading, becoming widely separated outward at base before growing upwards>; scapes (2–)5–20(–25) cm, glabrous. Flowers 7–12 mm diam.; sepals connate basally, oblong, 5–6 × 1–1.5 mm, glabrous; petals white, sometimes pink-tinged, obovate, 3–6 × 3–5 mm, <apical margins erose>. Capsules 4–5 mm. Seeds reddish brown, oblong-obovoid, 0.7–1 mm, densely, uniformly papillose. 2n = 20.
Life form perennial
Growth form herb
Growth support -
Foliage retention
Sexuality hermaphrodite
Pollination autogamy
Spread epizoochory
Mature width (meter) -
Mature height (meter) 0.03 - 0.06
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Light 7-9
Soil humidity 7-9
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 5-9

Usage

Uses medicinal
Edible -
Therapeutic use Wart (unspecified), Cyanogenetic (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) 30 - 90
Germination temperacture (C°) 12 - 18
Germination luminosity light
Germination treatment -
Minimum temperature (C°) -23
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Habit

Drosera intermedia habit picture by Rinusz (cc-by-sa)
Drosera intermedia habit picture by Eli Small (cc-by-sa)
Drosera intermedia habit picture by Eli Small (cc-by-sa)

Leaf

Drosera intermedia leaf picture by Chuck Farah (cc-by-sa)
Drosera intermedia leaf picture by Christophe Rollier (cc-by-sa)
Drosera intermedia leaf picture by Geneviève EYCHENNE (cc-by-sa)

Flower

Drosera intermedia flower picture by alain croibien (cc-by-sa)
Drosera intermedia flower picture by Patrick Nard (cc-by-sa)
Drosera intermedia flower picture by Mariken Lorie (cc-by-sa)

Fruit

Drosera intermedia fruit picture by Eli Small (cc-by-sa)
Drosera intermedia fruit picture by Groupe Botanique de Bruxelles (cc-by-sa)
Drosera intermedia fruit picture by Pierre LEON (cc-by-sa)

Distribution

Drosera intermedia world distribution map, present in Austria, Belgium, Bonaire, Sint Eustatius and Saba, Belarus, Brazil, Canada, Switzerland, Cameroon, Cuba, Czech Republic, Germany, Denmark, Spain, Estonia, Finland, France, United Kingdom of Great Britain and Northern Ireland, Georgia, French Guiana, Guyana, Liechtenstein, Sri Lanka, Lithuania, Latvia, Monaco, Moldova (Republic of), Netherlands, Norway, Poland, Puerto Rico, Portugal, Romania, Saint Pierre and Miquelon, Suriname, Slovakia, Slovenia, Sweden, Trinidad and Tobago, Ukraine, United States of America, and Venezuela (Bolivarian Republic of)

Identifiers

LSID urn:lsid:ipni.org:names:84157-2
WFO ID wfo-0000945976
COL ID 6DKGF
BDTFX ID 23104
INPN ID 95438
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Drosera intermedia f. natans Drosera americana Drosera media Drosera macedonica Drosera intermedia f. intermedia Drosera foliosa Rorella intermedia Drosera intermedia var. tenuis Drosera intermedia var. erecta Drosera intermedia var. americana Drosera intermedia var. corymbosa Drosera intermedia var. gracilis Drosera intermedia f. corymbosa Drosera intermedia f. elatior Drosera intermedia f. subcaulescens Drosera intermedia var. elatior Drosera intermedia