太白杜鹃一新变种

本变种与原变种var.purdomii的区别在于叶片较大,长4～11cm,宽2～55cm,上面疏生淡黄色长柔毛,边缘密生青白色和淡黄色缘毛,柔毛和缘毛易脱落;叶柄较长(长1～3cm);总花梗较长(长达18cm)。河南:嵩县,白云山国家森林公园,玉皇顶,海拔2100m,1993年7月4日,张益民、吴立宏93088(模式标本Typus存于河南农业大学植物标本室;同号模式标本存于中国科学院昆明植物研究所);内乡,宝天曼国家自然保护区,扫帚场,海拔1600m,1989年7月28日,张益民、温德臣89006。根据调查,本新变种常生于山之阴坡和湿度较大的地方。叶普遍较大,革质化程度稍低。生长状态叶上…     

雨访宝天曼

早听说,南阳市内乡县有一块名叫宝天曼的宝地,那里有河南保存最完整的原始森林。古时有“南曼到北曼,七十二家半”之说,讲的是大约宋明时期,偌大的宝天曼只有72户人家和一个寺庙,故此俗称“七十二家半”。这里还流传着一些或雄壮或凄婉的故事,如跑马坡上王莽追赶刘秀、平坊庙和尚欺负公主等等。常想若能亲临感受一下该多好啊,机会终于来了……     

太白杜鹃天然居群的表型多样性

为揭示太白杜鹃(Rhododendron purdomii)天然居群的表型变异程度、变异规律,以秦岭山区的7个天然居群为研究对象,对其花序和叶片的10个数量性状和8个质量性状进行方差分析、相关分析与聚类分析,探讨居群间与居群内表型多样性的变异特点。结果显示:(1)在太白杜鹃的质量性状中,花色与花瓣内斑在居群间与居群内均存在丰富变异,花朵香味、花序形状、花冠形状、花梗颜色、叶片形状和株型等仅在居群间存在明显变异,在居群内则趋于一致性;其数量性状在居群间与居群内也存在广泛变异,10个数量性状在居群间和居群内平均值差异全部达显著水平;在7个居群内数量性状的变异系数为0～55.3%,其中花梗长、花丝长、花瓣宽与叶柄长变异较大,花朵数变异较小。(2)相关性分析表明,太白杜鹃花瓣长和花瓣宽分别与经度存在极显著与显著负相关关系,叶片长、叶片宽和叶片长宽比与海拔均存在显著负相关关系,而其它性状与地理因子的关系密切。(3)聚类分析显示,太白杜鹃的7个天然居群可以初步分为两大类,但性状的表型特征并没有依地理距离而聚类。研究表明,太白杜鹃天然居群的表型性状在居群内与居群间均存在丰富的变异,而且其与居群特点、分布生境等关系密切。     

「神药」金钗

“宝天曼里三件宝,金钗、天麻、马蹬草”,这是河南伏牛山一带广为流传的民谚。“金钗”是兰科石斛属植物的茎,因色泽金黄,形状如钗,故称之为“金钗”,并有“神药”之誉。其神奇之处是生嚼之,肉粘味甘,味特耐久。泡茶饮用一月之内,其味不减,具有滋阴清热,养胃生津之效;过去是进贡皇帝的珍品,梅兰芳、马连良等著名艺术家保护嗓音的良方。     

封面植物介绍——太白红杉

太白红杉(Larix chinensis Beiss．)亦称太白落叶松,为松科落叶松属(Larix Mill．)植物,为秦岭特有种之一。乔木,高可达20m。树皮灰色或灰褐色,薄片状剥裂。小枝下垂,一年生小枝常呈淡黄褐色。叶倒披针状线形,扁平柔软,长1．5～2．5cm,在长枝上呈螺旋状散生,在短枝上簇生,叶表面中脉凸起,两侧各有1～2条气孔带。     

Restoration Goes Wild: A Reply to Throop and Purdom

Throop and Purdom’s proposal for virtues based restoration is consistent with my concept of focal restoration, but their interpretation conflates focal restoration with participatory restoration. We disagree on the meaning of wilderness and on the appropriate underlying relationship between nature and culture, which affects how each of us regards the role of restoration in so‐called wilderness. I prefer the term “wildness” over wilderness precisely because the former locates the power of meaning in process rather than place. The primary metaphors we used to describe the proper role of restoration differ, too. Throop and Purdom prefer “healing,” whereas my preference is for “design” as a way of acknowledging the moral implications of restoration interventions in natural processes.     

杜鹃花属

杜鹃花属(Rhododendron L.),常绿或落叶灌木,稀为乔木;分布于北温带约960种,我国约650种,主要集中产于西南、华南,是世界著名观赏植物。     

大白杜鹃、美容杜鹃和喇叭杜鹃的组织培养

1植物名称大白杜鹃(Rhododen drondecorum Franch.)、美容杜鹃(Rhododendron calophytum Franch.)、喇叭杜鹃(Rhododendron discolor Franch.)。2材料类别幼嫩茎段。3培养条件基本培养基为改良MS。(1)诱导愈伤组织培养基:改良MS NAA0.2mg·L-1(单位下     

Rhododendron im Tatragebirge

Ohne Zusammenfassung     

杜鹃花赏析

杜鹃花是我国传统观赏花卉。从种类、起源分布及生境的角度描述了杜鹃花的概况,从色、型、姿、韵的角度分析了杜鹃花的特色特点,从引种、栽培、生产及育种的角度简述了杜鹃花的研究进展,以提高对杜鹃花的赏析水平。     

Rhododendron gone wild: conservation implications of Rhododendron ponticum in Britain

Wild rhododendron (Rhododendron ponticum) is widely regarded by conservationists as a scourge of the British countryside. However, in its native haunts such as Turkey, it is also one of Europe's most threatened species, with ancient rhododendron forests now reduced to only a few hectares.     

满山红—新变型——绿晕满山红

描述了浙江满山红一新变型:绿晕满山红.新变型与原种的区别在于:花瓣乳白色,花冠筒淡绿色.     

Chemotaxonomic Study of Rhododendron

Analysis of 16 flavonoids and 3 other phenols in 177 samples of the genus Rhododendron was carried out by HPTLC silica gel plate-stepwise development and polyamide thin layer. The result reveals that the presence of monoglycosides of quercetin is a general character of flavonoids in the Chinese rhododendrons; some taxa are characterized by presence or absence of certain glycosides; although myricetin, and gossypetin are generally rare in this genus, they are concentrated in some taxa, and therefore they are valuable in chemotaxonomy. The significance of quantitative and semi-quantitative assessment of chem-ical characters for chemotaxonomy of Rhododendron is also discussed.