異(yi)形(xing)石花菜國(guo)內分布于河北(bei)省(sheng)、遼寧省(sheng)、山東(dong)省(sheng);國(guo)外(wai)分布于日本和韓國(guo)。
異形石花(hua)菜藻體直立,叢生(sheng)(sheng)或單生(sheng)(sheng),2.5~10cm高,體(ti)大部(bu)薄而扁(bian)(bian)平,基部(bu)生(sheng)(sheng)一小盤狀固著(zhu)器,其上(shang)生(sheng)(sheng)有(you)(you)分(fen)枝(zhi)(zhi)(zhi)的(de)(de)匍匐部(bu)分(fen),形似走莖。主干扁(bian)(bian)壓到扁(bian)(bian)平,老(lao)時中央(yang)變厚,兩翼扁(bian)(bian)壓,幅寬常不(bu)一致,一般來說與生(sheng)(sheng)境和生(sheng)(sheng)長年限有(you)(you)關,寬枝(zhi)(zhi)(zhi)藻體(ti)多(duo)生(sheng)(sheng)于內灣略有(you)(you)浮泥(ni)的(de)(de)隱蔽處或(huo)(huo)為多(duo)年生(sheng)(sheng)的(de)(de)藻體(ti),窄枝(zhi)(zhi)(zhi)藻體(ti)多(duo)見于較開(kai)闊的(de)(de)沿岸或(huo)(huo)為一年生(sheng)(sheng)的(de)(de)藻體(ti)。分(fen)枝(zhi)(zhi)(zhi)向上(shang)逐(zhu)漸或(huo)(huo)突(tu)然變細,兩緣互生(sheng)(sheng)分(fen)枝(zhi)(zhi)(zhi)1~2次(ci),可達(da)3~4次,體(ti)(ti)下部常密(mi)生(sheng)(sheng)(sheng)短枝(zhi)。分枝(zhi)形態與主干(gan)相似.或略窄細,腋角圓。末枝(zhi)短細,圓柱(zhu)狀,老時發(fa)育成生(sheng)(sheng)(sheng)殖(zhi)柱(zhu).規則(ze)地排列于分枝(zhi)兩側,有個別藻體(ti)(ti)的表面(mian)亦可(ke)生(sheng)(sheng)(sheng)出少量的生(sheng)(sheng)(sheng)殖(zhi)枝(zhi)。