Phedimus

SIKOKIANUS (Maximowicz) 't Hart,1995

Synonyms :

Sedum sikokianum  Maxirnowicz (1892) / Aizopsis sikokiana  (Maximowicz) Grulich (1984)

 

Subgenus Aizoon

 

Distribution : Japan (Shikoku Island, endemic); 1300 - 1900 m.

 

 

Description (according to IHSP, 2003) :

 

Small glabrous herbs with short rhizomes and short ascending flowering branches to 20 cm.

 

Leaves opposite, sessile or petiolate, spatulate-oblong to cuneate-spatulate or rhombic, crenate, 10 - 27 x 6 - 12 mm.

 

Inflorescences few-flowered cymes, bracts few, small, pedicels 1 – 2 mm.

 

FIowers 5-merous, sepals linear, 3 - 4 mm, petals spreading, linear-lanceolate, cuspidate, 6.5 mm, yellow.

 

Cytology : 2n = 16 (Amano & Obba 1990)

 

A rare and, untiI recently, rather unknown species.

It may be a key-species for understanding the evolution of the whole Subgenus Aizoon because of its low diploid chromosome number and the opposite leaves.




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