Stems to 1--2 m, glabrous, base rhizomatous. Petiole 25--40 cm; leaf blade 5--10 × 3.5--6 cm, glabrous. Flowers 1--2 cm in diam.; peduncle 6--10 cm. Perianth dull purple; segments 10--15(--20) × 2--7 mm; petals slightly longer and narrower than sepals, apex obtuse. Stamens 1/2 as long as petals, anthers linear, ca. 4 mm. Fruit 6--10 mm. Seeds 1--2, 2.5--4 × 2--3 mm. Fl. Jun., fr. Oct. 2n = 72, 80.

Source: [
• 11
]. 

Leaf blade 3.5-13.5 × 2-8 cm. Flowers ca. 2 cm diam.; perianth parts dull purple, 10-20 × 2-7 mm; petals slightly longer and narrower than sepals. Fruits 6-10 mm. Seeds 1-2, 2.5-4 × 2-3 mm. 2 n = 80.

Source: [
• 12
]. 

"Stem to 2 m; lf-blades elliptic, 4–12 cm, half as wide; fls dull purple, on stout peduncles to 15 cm; sep and pet persistent, the latter 12–16 mm, the former somewhat shorter; 2n=80. Quiet water; N.S. and e. Que. to Minn., s. to Fla. and Tex.; also on the Pacific slope, and in tropical Amer., and the Old World. Summer."

Source: [
• 13
]. 

Sepals purplish- or brownish- red, elliptic or narrowly oblong, 0.9–1.4 cm. long, 3–6 mm. wide, rounded atthe apex.

Source: [
• 9
]. 

Seeds pale brown, ellipsoid, 2.7–3.5 mm. long, 2–2.3 mm. wide.

Source: [
• 9
]. 

Filaments of the stamens filiform, 1 cm. long, papillose; anthers reddish, linear-oblong, 3.5 mm. long, apiculate.

Source: [
• 9
]. 

Petals crimson, purplish- or brownish-red, narrowly oblong or linear-oblong, 1.2–1.7 cm. long, 3–4 mm. wide, narrowly rounded at the apex.

Source: [
• 9
]. 

Fruiting carpels ellipsoid or fusiform, 0.6–1 cm. long, 2–2.5 mm. wide; stigma persistent.

Source: [
• 9
]. 

Carpels fusiform or narrowly ovoid, 5 mm. long, 1.5–2 mm. wide, sparsely papillose; stigma simple, 3–4.5 mm. long, papillose all over save for a narrow longitudinal area facing the perianth.

Source: [
• 9
]. 

Apparently glabrous aquatic with all submerged parts covered with a profuse clear slimy jelly-like mucilage; the outsides of the sepals and petals, the undersurfaces of the leaves, submerged petioles, pedicels, etc., are covered with minute purplish glandular hairs which may secrete this mucilage.

Source: [
• 9
]. 

Leaf-blades round or broadly elliptic, 2.5–11.5 cm. long, 1.5–7 cm. wide, entire, green above, usually reddish-brown or purplish beneath with 12 nerves radiating from the centre; petiole-length depending on the depth of the water, 0.05–1 m. long or more, slender, ±1.5 mm. in diameter.

Source: [
• 9
]. 

Pedicels reddish-brown, 4–5 cm. long, 2 mm. in diameter.

Source: [
• 9
]. 

Stamens with slender papillose filaments up to 1 cm. long; anthers reddish, 3.5 mm. long, narrowly oblong, apiculate at the apex.

Source: [
• 10
]. 

Carpels 5 x 2 mm., narrowly lanceolate-ovoid, sparsely papillose, stigma simple, 3 mm. long, papillose.

Source: [
• 10
]. 

Ripe carpels 7 x 2 mm., ellipsoid with a persistent stigma.

Source: [
• 10
]. 

Seeds 3.5 x 2.3 mm., ellipsoid, testa pale brown.

Source: [
• 10
]. 

Leaves floating, rotund, peltate, 7.5 (10) x 5–7 cm., margin entire, green above, reddish-brown or purplish below, nerves 12, radiating from the apex of the petiole, rather faint, petiole reddish-brown, attached at the centre of the leaf-blade, up to 1 m. or more long according to the depth of the water, c. 1.5 mm. in diam.

Source: [
• 10
]. 

Glabrous aquatic plant with all its submerged parts covered with a profuse, clear, slimy mucilage.

Source: [
• 10
]. 

Sepals purplish-brownish-red, petaloid, c. 1.4 x 0.3 cm., narrowly oblong, apex rounded.

Source: [
• 10
]. 

Flowers solitary, axillary on reddish-brown peduncles up to c. 8 cm. long, c. 2 mm. in diam.

Source: [
• 10
]. 

Petals similar to the sepals but slightly larger.

Source: [
• 10
]. 

Glabrous, aquatic herb. Submerged parts of plant covered with profuse, clear, slimy mucilage. Leaves floating, peltate. Flowers produced under water, purplish to brownish red.

Source: [
• 14
]. 

Herbe' aquatique, rhizomateuse, portant de minuscules poils glandulaires, à parties submergées jeunes couvertes d'un mucilage abondant, transparent, incolore. Tiges grêles, ramifiées, feuillées.' Feuilles' à pétiole rougeâtre, pouvant atteindre 1 m de long et d'environ 1,5-2 mm de diam.; limbe elliptique à suborbiculaire, de 7,5-10 × 5-7 cm, à bords entiers, vert à la face supérieure mais rougeâtre sur les bords, pourpre à la face inférieure; nervures 12, rayonnant du sommet du pétiole, visibles surtout à la face inférieure.' Fleurs' à pédoncule rougeâtre, atteignant 8 cm de long et d'environ 2 mm de diamètre; sépales 3(-4), pétaloïdes, rouge pourpre à brunâtre, oblongs, de 1,2-1,4 × 0,3 cm, à sommet arrondi; pétales 3(-4), semblables aux sépales, mais un peu plus longs; étamines environ 16, à filet filiforme, légèrement papilleux, de 5-10 mm de long; anthère rouge sombre de 3,5-4 mm de long, étroitement oblongue, à sommet ordinairement apiculé; carpelles étroitement lancéolés-ovoïdes, de 5-7 × 2 mm, éparsement papilleux, à stigmate de 3 mm de long; ovules 2-3, ovoïdes, à tégument rose. Carpelles mûrs ellipsoïdes, de 7-12 × 2,5-3,5 mm, à stigmate persistant.'Graines ellipsoïdes, de 3,5 × 2,3 mm, à tégument brun pâle.' Multiplication végétative par des sortes de boutures formées sur des fragments de tiges assez âgées, produisant des feuilles très petites, à limbe de 0,8-1,5 × 0,4-0,8 cm.

Source: [
• 15
]. 

Stagnant pools.

Source: [
• 14
]. 

Lacs, étangs, mares, cours d'eau très lents, à eau acide, peu minéralisée.

Source: [
• 15
]. 

Uganda, Kenya, Tanzanie, Angola, Zambie, Botswana; Amérique du Nord, Amérique tropicale, Inde, Japon, Australie.

Source: [
• 15
]. 

SELECTED REFERENCES

Osborn, J. M. and E. L. Schneider. 1988. Morphological studies of the Nymphaeaceae sensu lato. XVI. The floral biology of Brasenia schreberi. Ann. Missouri Bot. Gard. 75: 778-794.

Source: [
• 12
].