分(fen)布于中(zhong)國(guo)廣西上金縣,生于山(shan)谷石灰巖石邊。
攀援草本。莖圓(yuan)柱(zhu)形(xing)(xing),橄欖色,上(shang)部(bu)(bu)有傘房狀(zhuang)分(fen)枝(zhi),枝(zhi)開(kai)展,具(ju)細條紋,被灰色短柔毛,雜有腺體,下(xia)部(bu)(bu)的(de)枝(zhi)長(chang)(chang)達16厘(li)(li)米(mi)(mi)(mi),節間4-5厘(li)(li)米(mi)(mi)(mi);葉硬紙質,中(zhong)部(bu)(bu)葉披(pi)針(zhen)狀(zhuang)橢圓(yuan)形(xing)(xing),長(chang)(chang)8-9厘(li)(li)米(mi)(mi)(mi),寬2-2.5厘(li)(li)米(mi)(mi)(mi),頂端(duan)尖,基(ji)部(bu)(bu)楔狀(zhuang)尖,緣或中(zhong)部(bu)(bu)以(yi)上(shang)有不明顯的(de)具(ju)短小尖的(de)疏細齒,羽狀(zhuang)脈,側脈明顯,向邊緣綱結,上(shang)面(mian)下(xia)凹(ao),下(xia)面(mian)凸起,上(shang)面(mian)綠色,下(xia)面(mian)稍淡,兩面(mian)被糙(cao)短毛,下(xia)面(mian)雜有腺點;葉柄長(chang)(chang)3-5毫(hao)米(mi)(mi)(mi),密被短柔毛;上(shang)部(bu)(bu)葉長(chang)(chang)圓(yuan)形(xing)(xing),橢圓(yuan)狀(zhuang)長(chang)(chang)圓(yuan)形(xing)(xing)或狹卵形(xing)(xing),長(chang)(chang)達2厘(li)(li)米(mi)(mi)(mi),寬0.9厘(li)(li)米(mi)(mi)(mi),頂端(duan)尖或稍鈍,基(ji)部(bu)(bu)楔形(xing)(xing),全緣,最上(shang)部(bu)(bu)葉小,近無柄。
頭狀花(hua)序盤狀,具短或無花(hua)序梗,單生或2-3個(ge)(ge)簇生,花(hua)序梗長(chang)(chang)(chang)(chang)(chang)達6毫(hao)(hao)米(mi)(mi),具卵(luan)狀披針(zhen)形(xing)(xing)(xing)(xing)的(de)苞(bao)片;總苞(bao)鐘(zhong)(zhong)狀圓(yuan)(yuan)柱形(xing)(xing)(xing)(xing),長(chang)(chang)(chang)(chang)(chang)5-5.5毫(hao)(hao)米(mi)(mi),寬3-4毫(hao)(hao)米(mi)(mi);總苞(bao)片5-6層(ceng)(ceng),外(wai)層(ceng)(ceng)卵(luan)形(xing)(xing)(xing)(xing),長(chang)(chang)(chang)(chang)(chang)1.5-2毫(hao)(hao)米(mi)(mi),頂(ding)(ding)端(duan)稍尖(jian),中層(ceng)(ceng)卵(luan)狀長(chang)(chang)(chang)(chang)(chang)圓(yuan)(yuan)形(xing)(xing)(xing)(xing),長(chang)(chang)(chang)(chang)(chang)2.5-3毫(hao)(hao)米(mi)(mi),內(nei)層(ceng)(ceng)長(chang)(chang)(chang)(chang)(chang)圓(yuan)(yuan)形(xing)(xing)(xing)(xing),長(chang)(chang)(chang)(chang)(chang)約(yue)(yue)(yue)4毫(hao)(hao)米(mi)(mi),頂(ding)(ding)端(duan)鈍(dun),背面(mian)及邊緣被疏(shu)柔(rou)毛(mao)(mao)(mao),常雜有腺;花(hua)托平(ping),徑約(yue)(yue)(yue)1毫(hao)(hao)米(mi)(mi),具小窩孔;外(wai)圍的(de)雌花(hua)1層(ceng)(ceng),約(yue)(yue)(yue)7個(ge)(ge),舌狀,管(guan)部圓(yuan)(yuan)柱形(xing)(xing)(xing)(xing),長(chang)(chang)(chang)(chang)(chang)約(yue)(yue)(yue)2.5毫(hao)(hao)米(mi)(mi),舌片極小,頂(ding)(ding)端(duan)具不(bu)明(ming)顯的(de)3雌齒;花(hua)柱分枝線形(xing)(xing)(xing)(xing),頂(ding)(ding)端(duan)鈍(dun);央(yang)的(de)兩(liang)性花(hua)少(shao)數(約(yue)(yue)(yue)3個(ge)(ge)),花(hua)冠(guan)黃(huang)色,管(guan)狀,長(chang)(chang)(chang)(chang)(chang)4.5-5毫(hao)(hao)米(mi)(mi),管(guan)部圓(yuan)(yuan)柱形(xing)(xing)(xing)(xing),檐部狹鐘(zhong)(zhong)狀,具5個(ge)(ge)不(bu)等長(chang)(chang)(chang)(chang)(chang)的(de)裂(lie)(lie)片,裂(lie)(lie)片線狀披針(zhen)形(xing)(xing)(xing)(xing),內(nei)彎,外(wai)面(mian)2裂(lie)(lie)片長(chang)(chang)(chang)(chang)(chang)1.6毫(hao)(hao)米(mi)(mi),內(nei)面(mian)的(de)裂(lie)(lie)片長(chang)(chang)(chang)(chang)(chang)約(yue)(yue)(yue)1毫(hao)(hao)米(mi)(mi);瘦果長(chang)(chang)(chang)(chang)(chang)圓(yuan)(yuan)狀倒卵(luan)形(xing)(xing)(xing)(xing),長(chang)(chang)(chang)(chang)(chang)1.5毫(hao)(hao)米(mi)(mi),兩(liang)面(mian)具2肋,被疏(shu)微毛(mao)(mao)(mao);冠(guan)毛(mao)(mao)(mao)淡黃(huang)白色,糙毛(mao)(mao)(mao)狀,長(chang)(chang)(chang)(chang)(chang)4.3毫(hao)(hao)米(mi)(mi)。花(hua)期10月。
該種(zhong)(zhong)外形,特別(bie)是分枝體(ti)態及(ji)總(zong)片(pian)質地酷似斑鳩菊(ju)屬的(de)某些(xie)種(zhong)(zhong)類,但花的(de)結構完全不同(tong)。
異裂菊尚(shang)未栽(zai)培(pei)研(yan)究。可用種(zhong)子繁殖。
異裂菊是中(zhong)國特有的寡種屬(shu),分布區極狹窄,數量稀少(shao),必須加強保護,以免滅(mie)絕。保護該種,對研究菊科某些類群的分類有一定的科研價值。