赤松(song)(Pinus densiflora Sieb.et Zucc.)是松(song)科松(song)屬植物(wu)，喬木，高達(da)30米(mi)(mi)(mi)(mi)，胸徑達(da)1.5米(mi)(mi)(mi)(mi)；樹(shu)(shu)皮桔(jie)紅(hong)(hong)色(se)，樹(shu)(shu)干上部樹(shu)(shu)皮紅(hong)(hong)褐色(se)；枝平(ping)展形(xing)成(cheng)傘(san)狀樹(shu)(shu)冠(guan)；一年生枝淡黃(huang)(huang)色(se)或(huo)紅(hong)(hong)黃(huang)(huang)色(se)。雄球(qiu)花(hua)淡紅(hong)(hong)黃(huang)(huang)色(se)，圓(yuan)筒形(xing)；雌(ci)球(qiu)花(hua)淡紅(hong)(hong)紫(zi)色(se)。球(qiu)果成(cheng)熟時暗黃(huang)(huang)褐色(se)或(huo)淡褐黃(huang)(huang)色(se)，種(zhong)(zhong)鱗(lin)張開，不久即脫落，卵圓(yuan)形(xing)或(huo)卵狀圓(yuan)錐形(xing)；種(zhong)(zhong)鱗(lin)薄，鱗(lin)盾(dun)扁菱形(xing)，通常扁平(ping)；種(zhong)(zhong)子倒卵狀橢圓(yuan)形(xing)或(huo)卵圓(yuan)形(xing)，長4-7毫米(mi)(mi)(mi)(mi)；連翅長1.5-2厘米(mi)(mi)(mi)(mi)，種(zhong)(zhong)翅寬5-7毫米(mi)(mi)(mi)(mi)；子葉5-8枚，長2.5-4厘米(mi)(mi)(mi)(mi)，邊緣有細鋸齒。花(hua)期4月，球(qiu)果次年9月下旬至(zhi)10月成(cheng)熟