Echinodorus aschersonianus
Encyclopedia

Description

Leaves
Leaves
-History:Vocalist Arnar Gudjonsson was formerly the guitarist with Mower, and he was joined by Hallur Hallsson , Arnar Ólafsson , Bjarni Grímsson , and Andri Ásgrímsson . Late in 2001 they played with Emiliana Torrini and drew early praise from the New York Times...

 35 - 40 cm long, petioles usually as long as the blades. Blades very variable; usually cordate, at the tip blunt or hardly acuminate, at the base shallowly lobate, or oval, ovate or nearly lanceolate. All forms can be found on the same plant. Blades 13cm long x 2.5 - 8cm wide, without pellucid lines. It is the only species with relatively short, cordate blades without pellucid markings and with a creeping habit.

Stem creeping, up to 50cm long, proliferous. Inflorescence
Inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Strictly, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified...

 racemose, rarely branched in the lower whorl, having 2 - 3(7) whorls containing only 3 - 6 flowers each. Bracts shorter, as long as or longer than the pedicels. Pedicels usually 1-(2) cm long, sometimes only 2 - 4 mm long or nearly absent. Flowers white, stamens 24-28, corolla 2.5 - 3.5 cm in diameter. Achenes about 2 mm long, with several ribs and (1) - 2 - 3 lateral glands or without them.

2n=22

varieties

var. aschersonianus from Brazil, Paraguay, Uruguay, Argentina. Achenes with (1 - 2) 3 lateral glands placed in one row.

var. nulliglandulosus Rataj in Darwiniana 16(1 - 2) 25, 1970 from at least Argentina. Nutlets without glands. nb. Christel Kasselmann lists this as synonym.

A reddish form called rose is sold in the aquarium
Aquarium
An aquarium is a vivarium consisting of at least one transparent side in which water-dwelling plants or animals are kept. Fishkeepers use aquaria to keep fish, invertebrates, amphibians, marine mammals, turtles, and aquatic plants...

trade and described as a hybrid between Echinodorus uruguayensis and Echinodorus aschersonianus.

External links

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