赤(chi)松(song)(song)(Pinus densiflora Sieb.et Zucc.)是松(song)(song)科松(song)(song)屬植物，喬木(mu)，高達(da)30米，胸(xiong)徑達(da)1.5米；樹(shu)皮(pi)桔紅色(se)，樹(shu)干(gan)上部(bu)樹(shu)皮(pi)紅褐色(se)；枝平(ping)(ping)展形(xing)(xing)成傘狀(zhuang)樹(shu)冠；一年生枝淡黃(huang)(huang)色(se)或紅黃(huang)(huang)色(se)。雄球(qiu)(qiu)(qiu)花淡紅黃(huang)(huang)色(se)，圓(yuan)(yuan)筒(tong)形(xing)(xing)；雌(ci)球(qiu)(qiu)(qiu)花淡紅紫色(se)。球(qiu)(qiu)(qiu)果成熟時暗黃(huang)(huang)褐色(se)或淡褐黃(huang)(huang)色(se)，種(zhong)鱗(lin)張開，不久(jiu)即(ji)脫落，卵(luan)(luan)(luan)圓(yuan)(yuan)形(xing)(xing)或卵(luan)(luan)(luan)狀(zhuang)圓(yuan)(yuan)錐形(xing)(xing)；種(zhong)鱗(lin)薄，鱗(lin)盾扁菱形(xing)(xing)，通常扁平(ping)(ping)；種(zhong)子倒卵(luan)(luan)(luan)狀(zhuang)橢圓(yuan)(yuan)形(xing)(xing)或卵(luan)(luan)(luan)圓(yuan)(yuan)形(xing)(xing)，長(chang)(chang)4-7毫米；連翅長(chang)(chang)1.5-2厘(li)米，種(zhong)翅寬(kuan)5-7毫米；子葉5-8枚，長(chang)(chang)2.5-4厘(li)米，邊緣有細鋸齒。花期4月，球(qiu)(qiu)(qiu)果次(ci)年9月下旬至10月成熟