雪松(song)喬木,高(gao)達(da)30米(mi)(mi)(mi)(mi)左右,胸徑可達(da)3米(mi)(mi)(mi)(mi);樹皮深(shen)灰(hui)(hui)色,裂成(cheng)不規則的(de)鱗狀(zhuang)片;枝平展(zhan)(zhan)(zhan)、微斜展(zhan)(zhan)(zhan)或微下垂,基部(bu)(bu)(bu)宿存芽鱗向外反(fan)曲,小枝常(chang)下垂,一年(nian)生(sheng)(sheng)長(chang)(chang)(chang)(chang)(chang)枝淡(dan)灰(hui)(hui)黃(huang)色,密(mi)生(sheng)(sheng)短(duan)絨(rong)毛,微有(you)白粉(fen),二、三(san)年(nian)生(sheng)(sheng)枝呈灰(hui)(hui)色、淡(dan)褐(he)灰(hui)(hui)色或深(shen)灰(hui)(hui)色。葉(xie)(xie)在長(chang)(chang)(chang)(chang)(chang)枝上(shang)輻射伸展(zhan)(zhan)(zhan),短(duan)枝之葉(xie)(xie)成(cheng)簇生(sheng)(sheng)狀(zhuang)(每年(nian)生(sheng)(sheng)出(chu)新葉(xie)(xie)約15-20枚(mei)),葉(xie)(xie)針(zhen)形(xing)(xing)(xing),堅硬,淡(dan)綠色或深(shen)綠色,長(chang)(chang)(chang)(chang)(chang)2.5-5厘米(mi)(mi)(mi)(mi),寬(kuan)1-1.5毫(hao)米(mi)(mi)(mi)(mi),上(shang)部(bu)(bu)(bu)較寬(kuan),先端銳尖,下部(bu)(bu)(bu)漸窄,常(chang)成(cheng)三(san)棱形(xing)(xing)(xing),稀背脊明顯,葉(xie)(xie)之腹(fu)面兩側各有(you)2-3條氣孔(kong)線(xian),背面4-6條,幼(you)時氣孔(kong)線(xian)有(you)白粉(fen)。雄球(qiu)(qiu)花(hua)(hua)長(chang)(chang)(chang)(chang)(chang)卵圓形(xing)(xing)(xing)或橢(tuo)(tuo)圓狀(zhuang)卵圓形(xing)(xing)(xing),長(chang)(chang)(chang)(chang)(chang)2-3厘米(mi)(mi)(mi)(mi),徑約1厘米(mi)(mi)(mi)(mi);雌球(qiu)(qiu)花(hua)(hua)卵圓形(xing)(xing)(xing),長(chang)(chang)(chang)(chang)(chang)約8毫(hao)米(mi)(mi)(mi)(mi),徑約5毫(hao)米(mi)(mi)(mi)(mi)。球(qiu)(qiu)果成(cheng)熟前淡(dan)綠色,微有(you)白粉(fen),熟時紅褐(he)色,卵圓形(xing)(xing)(xing)或寬(kuan)橢(tuo)(tuo)圓形(xing)(xing)(xing),長(chang)(chang)(chang)(chang)(chang)7-12厘米(mi)(mi)(mi)(mi),徑5-9厘米(mi)(mi)(mi)(mi),頂(ding)端圓鈍(dun),有(you)短(duan)梗;中部(bu)(bu)(bu)種(zhong)鱗扇(shan)狀(zhuang)倒三(san)角(jiao)形(xing)(xing)(xing),長(chang)(chang)(chang)(chang)(chang)2.5-4厘米(mi)(mi)(mi)(mi),寬(kuan)4-6厘米(mi)(mi)(mi)(mi),上(shang)部(bu)(bu)(bu)寬(kuan)圓,邊緣內曲,中部(bu)(bu)(bu)楔(xie)狀(zhuang),下部(bu)(bu)(bu)耳形(xing)(xing)(xing),基部(bu)(bu)(bu)爪狀(zhuang),鱗背密(mi)生(sheng)(sheng)短(duan)絨(rong)毛;苞(bao)鱗短(duan)小;種(zhong)子(zi)近三(san)角(jiao)狀(zhuang),種(zhong)翅寬(kuan)大,較種(zhong)子(zi)為(wei)長(chang)(chang)(chang)(chang)(chang),連(lian)同種(zhong)子(zi)長(chang)(chang)(chang)(chang)(chang)2.2-3.7厘米(mi)(mi)(mi)(mi)。
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