Aquarius subulatus (Mart. ex Schult.f.) Christenh. & Byng

Aquarius subulatus (Mart. ex Schult.f.) Christenh. & Byng

DE

Basionym : Echinodorus subalatus (Mart. ex Schult.f.) Griseb.

Synonyms:

   Echinodorus andrieuxii (Hook. & Arn.) Small

   Echinodorus andrieuxii var. longistylus (Buchenau) Rataj

   Echinodorus ellipticus var. ovatus Micheli

   Echinodorus intermedius (Mart. ex Schult.f.) Griseb.

   Echinodorus martii Micheli

   Echinodorus subalatus subsp. andrieuxii (Hook. & Arn.) R.R.Haynes & Holm-Niels.

   Echinodorus subalatus var. minor F.J.Mey.

   Alisma andrieuxii Hook. & Arn.

   Alisma subalatum var. majus Schult.f.

   Alisma subalatum var. medium Schult.f.

   Alisma subalatum var. minus Schult.f.

Sagittaria palifolia var. subalata (Mart. ex Schult.f.) Kuntze

Occurrence:

From Mexico to Bolivia and southern Brazil.

Ecology

Temporary ponds and damp depressions on flooded savannahs, floodplains. From sea level to 1500 m.

Morphology General habit

Perennial, from rhizomes, petioles and stems glabrous to rough, up to 120 cm, rhizomes up to 8 cm long, 4 cm diam. Leaves mostly emersed, leaf blade elliptic to oval, 5 - 9-veined, 15 - 40 cm long, 4 - 17 cm wide, glaucous markings absent or present as lines, apex acute, base finely attenuated, petioles canalized, furrowed, up to 50 cm long , 0.5 - 2 cm diam, base with sheath up to 15 cm long, submerged leaves linear-elliptic, entire, 3 - 5 veins, 7 - 15 cm long, 0.5 - 1 cm wide, apex acute, base attenuated, glaucous markings absent, petioles canalized, furrowed, up to 5 cm long, c. 0.3 mm diam., base with sheath up to 1.5 cm long

Morphology Reproductive morphology Fruits

Fruit oblanceoloid, 3 - 6-ribbed, glandular, 1.5 - 2.3 mm long, 1 mm wide, glands 1 (- 3), circular, separated by ribs, beak end, erect, 0.5 - 1.5 mm.

Morphology Reproductive morphology Inflorescences

Inflorescence racemose or rarely paniculate, of 5 - 15 whorls, each 3 - 18-flowered, erect, shorter than or slightly exceeding leaves, occasionally multiplying, up to 40 cm long, 2 - 8 cm wide, rachis triangular in cross-section, alate , petioles furrowed, up to 50 cm long, bracts fused, lanceolate, much longer than petioles subtended, 1.5 - 6 cm long, 2 - 9 mm wide, 11 - 19-veined, apex long-pointed, pedicels spreading in flower and fruit, 0.2 - 1.5 cm long, approx. 0.5 mm diam. flowers 1.5 - 3 cm in diameter, sepals and petals spreading, sepals 9 - 15-veined, ca. 5 mm long, ca. 4 mm wide, veins without papillae, petals not clawed, not overlapping, ca. 9 mm long, ca. 6 mm wide, stamens 12, anthers many-sided, ca. 1.2 mm long, filaments ca. 1.8 mm long, carpels numerous

Phenology

Flowering and fruiting all year round.

• 
  Echinodorus subalatus (Mart.) Griseb.
• 
  Echinodorus subalatus (Mart.) Griseb.
• 
  Echinodorus subalatus (Mart.) Griseb.
• 
  Echinodorus subalatus (Mart.) Griseb.
• 
  Echinodorus subalatus (Mart.) Griseb.