TUHLAB, tahlub, taylason, obsabzak, naski obi, naskobi (Lemna), yak jinsi giyohhoi bisyorsola (az oilai tuhlabiho). Tuhlab giyohi khurdi obi buda, dar rui ob yo andake poyontar az sathi on mesabzad. Poyaash pahnaki sabzu khurdi bargshakli mudavvar yo darozruya buda, yaktob reshai resmonshakl dorad. Mevaash khaltachashakli 1-7 tukhma. Tuhlab khele kam gul mekunad.
Bo rohi nashvi — gayritukhmi (pahnaki on shokh va resha meronad) bosurat ziyod meshavad. Tuhlabho metavonand dar davomi chand ruz tamomi obanborro faro girand. Dar SSSR (az on jumla Tojikiston) 3 namudi tuhlab: L. trisulca ( vodii Hisor), L. minor (nohiyahoi janub va shimoli Tojikiston) va L. Gibba (obhoi noravoni vodii Somgar, sohili rosti daryoi Sir) meruyad.
Tuhlab (L. trisulca) khuroki khubi parrandahoi obi va mohiyonand. Tabiboni khalqi tuhlabro baroi tabobati dardi chashm, haftpust va gayra tavsiya medihand. S. Yunusov.