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Family: ISOETACEAE 

 Isoetes japonica
 
  
Author:  Addison Brown 1861
Family:  Isoetaceae
Habitat:  Japan, Korea
Soil:  Sand
Water:  Max
Sun:  Medium
Thickness:  3 centimetres
Height:  30 centimetres
Flower:  No: Spores; white or cream-colored
Reproduction:  Spores
Pop names:  Japanese Quillwort, Brasenføde, Brachsenkräuter
Synonyms:   
  

 This member of the Isoetaceae family was given this name by Addison Brown in 1861. It is found in the Southern Korea and probably in other parts of Asia, growing on swamps and in lakes with little nutrition, down to two meters debt and a pH around 7. The caudex can grow to three centimetre in diameter, the leaves to 30 centimetres length. 

 Isoetes japonica and I. coreana are quite close. Both are submerged or amphibious. I. coreana  produces megaspore with irregular, branching crested ornaments on surface while I. japonica produces megaspore that has evidently reticulate ornaments. The trilobed caudex of Isoetes japonica consists of two distinct structures, viz. Stem and Rhizophore, to which the leaves and roots are respectively attached; but owing to the stunted growth of the plant, all external morphological differentiation between the two organs has been completely lost.

Also seen as member of the Juncaceae  and Lycopodiaceae  families.

Kingdom SubKingdom SuperDivision Division SubDivision Class SubClass Order Family Genus Species
PLANTAE Tracheophyta

Pteridophytes

Lycopodiophyta

Lycopodiophytina

Isoetopsida

Isoetidae

Isotales

Isoetaceae

Isoetes japonica