细花兰,中国云南兰科一新种

对兰科新种细花兰(Cymbidium micranthum)作了描述与绘图。新种产云南马关,与珍珠矮略相近,但不具延长的根状茎,有长1～1．5cm的假鳞茎,叶在中部以下多少对摺,有关节,唇瓣顶端内弯,蕊柱长1～1．2cm,甚易区别。     

中国云南兰科一新种——二叶兰

基于采自中国云南东南部的栽培植物。对兰科新种二叶兰（Cymbidium rhizomatosum)作了描述与绘图。此新种与兔耳兰（Cymbidium lancifoium)有亲缘关系。区别点在于本新种具2枚基生叶,叶在花凋谢后出现,有1条黄白色的地下根状茎,长7-10cm,直径6-15mm。     

靖西铁线莲, 广西毛茛科一新种

该文描述了自广西发现的毛茛科铁线莲一新种,靖西铁线莲,此新种与宝岛铁线莲在亲缘关系上接近,与后者的区别在于本种的茎疏被短柔毛,小叶卵形或狭卵形,不分裂,聚伞花序有1～3花,萼片较大长1.7～2 cm,宽0.5～0.7 cm。     

中国兰科两新种

对中国兰科两新种--麻栗坡卷瓣兰(Bulbophyllum malipoense) 和赵氏蜘蛛兰(Arachnis zhaoi)作了描述和绘图.前者与直立卷瓣兰(B.unciniferum)相近,区别点在于新种的假鳞茎聚生,卵球形;叶较小,长2～3.5cm;侧萼片较短,长1.4～1.7 cm,仅中部合生;后者与窄唇蜘蛛兰(A.labrosa)有亲缘关系,但新种花淡黄绿色,无红棕色斑,花瓣稍宽于萼片,易于区别.     

假鹰爪

<正>假鹰爪(Desmos chinensis Lour.)隶属于番荔枝科(Annonaceae)假鹰爪属植物,直立或攀缘灌木。叶薄纸质,长圆形或椭圆形,长4～13 cm,宽2～5 cm,顶端钝或急尖,基部楔形至近圆形。花单朵与叶对生或互生,有时顶生;花梗长2～5.5 cm,无毛:萼片卵形;内外轮花瓣长圆形或长圆状披针形,外轮花瓣较大,长达9 cm,宽约2 cm,内轮花瓣长约7 cm,宽约1.5 cm;花托顶端平或略凹陷:雄蕊长圆形,药隔顶端截形;心皮长1～1.5 mm,被长柔毛;果成熟时长2～5cm,具柄;柱头近头状,     

封面植物介绍——太白美花草

太白美花草(Callianthemum taipaicum W.T.Wang)又名重叶莲,隶属于毛茛科美花草属。为多年生草本,高8～10cm,全株无毛。基生叶3～6片,花期不完全展开;叶柄长2～10cm,基部抱茎;叶片深裂,小叶2～3对,再2～3裂。茎生叶1～2片,长1～2.5cm。花直径2.2～2.8cm。萼片5,蓝紫色。花瓣9～13,基部褐色,狭倒卵形或倒披针形,长11～14mm,宽3.5～6mm,先端截形。雄蕊长4～5mm;花丝狭线形;花药长圆形,长约0.8mm。心皮18～22个。花期6月。     

封面植物介绍——太白美花草

太白美花草(Callianthemum taipaicum W.T.Wang)又名重叶莲,隶属于毛茛科美花草属。为多年生草本,高8～10cm,全株无毛。基生叶3～6片,花期不完全展开;叶柄长2～10cm,基部抱茎;叶片深裂,小叶2～3对,再2～3裂。茎生叶1～2片,长1～2.5cm。花直径2.2～2.8cm。萼片5,蓝紫色。花瓣9～13,基部褐色,狭倒卵形或倒披针形,长11～14mm,宽3.5～6mm,先端截形。雄蕊长4～5mm;花丝狭线形;花药长圆形,长约0.8mm。心皮18～22个。花期6月。     

中国栘木衣属（Docynia Dcne.）一新种——长爪栘木衣

报道了栘木衣属一新种,长爪栘木衣(Docynia longisunguis Q.Luo et J.L.Liu)。该新种与栘木衣(Docynia indica(Will.) Dcne.)和云南栘木衣(Docynia delavayi (Franch.)Schneid.)相似,但以花较大,直径3.5~4 cm,花瓣长20～25 mm,宽12～16 mm,基部具长爪,长5～9 mm,雄蕊46～53;子房5～6（7）,花柱5～6（7）;果径3～4.5 cm,而与它们相区别。     

中国兰科石豆兰属一新种

描述了中国石豆兰属Bulbophyllum一新种——天贵卷瓣兰（Bulbophyllum tianguii K．Y．Lang ＆ D．Luo）,并提供墨线图。该种产于广西乐业县,与富宁卷瓣兰B．funingense Z．H．Tsi＆S．C．Chen外貌颇相似,但中萼片先端渐尖并具3mm长的芒,侧萼片宽4～4．5mm,花瓣先端渐尖并具1．5mm长的芒,唇盘具2条肉质、具缘毛的纵脊,可与后者明显区别。     

中国兰科石豆兰属(Bulbophyllum)二新种(英文)

对兰科(Orchidaceae)石豆兰属(Bulbophyllum)二新种,副萼石豆兰(B.malipoense Z.J.Liu,L.J.ChenW.H.Rao)和小副萼石豆兰(B.minor Z.J.Liu,L.J.ChenW.H.Rao)作了描述和绘图。该二新种属于石豆兰属副萼组(Bulbophyllumsection BisetaJ.J.Verm.ex N.Pearce,P.J.CribbJ.Renz),与该组的刺萼石豆兰(B.bisetum Lindl.)相似,区别在于两新种的叶片先端二裂和唇瓣无毛。小副萼石豆兰与副萼石豆兰的区别在于假鳞茎椭圆球形;叶片卵状椭圆形,长1.2～2 cm;侧副萼片较短,长约1 mm;中副萼片几乎与两侧萼片边缘合生。     

麻栗坡长叶兰,中国云南兰科一新杂种

报道了产自云南麻栗坡的兰科兰属一新杂种——麻栗坡长叶兰(Cymbidium×malipoense L.J.Chen,H.B.Zhou&Z.J.Liu),对该种的形态特征进行了描述。该种可能是长叶兰(Cymbidium erythraeum Lindl.)与龙州兰(C.eburneum var.longzhouense Z.J.Liu et S.C.Chen)的天然杂交种。本种与长叶兰的区别是:本种的花葶自叶腋发出;萼片和花瓣浅黄绿色,具浅紫红色的纵条纹和斑点;唇盘具黄色褶片;蕊柱浅紫红色;中裂片卵状肾形。长叶兰的萼片和花瓣绿色,有红褐色脉纹和不规则斑点;中裂片心形到剑形;唇盘密被毛。本种与龙州兰的区别是:本种萼片和花瓣浅黄绿色,具浅紫红色的纵条纹和斑点;侧裂片有紫红色条纹;蕊柱浅紫红色。龙州兰萼片和花瓣白色,外表面略带粉红色;唇瓣白色,侧裂片和中裂片具有紫红色斑点。     

罗氏石斛,中国兰科一新种

描述了自湖南省新宁县发现的兰科石斛属石斛组一新种——罗氏石斛(Dendrobium luoi L.J.ChenW.H.Rao),并给出其与近缘种河口石斛(D.hekouense Z.J.LiuL.J.Chen)的区别特征:本种的花梗与子房长2~2.5cm;花淡黄色,萼片先端红褐色,中萼片狭卵状椭圆形;唇瓣倒卵状匙形,不裂,具紫褐色斑块;唇盘中央具3条褶片并从基部延伸至先端;褶片中间增粗并具乳突状毛。     

Continuous petal variation in Epimedium tianmenshanense (Berberidaceae), a taxon endemic to western Hunan,China

In the protologue, Epimedium tianmenshanense (Berberidaceae), a species endemic to western Hunan, China, was described as ‘flower small, 0.2–0.4 cm diam., inner sepals white, petals as long as inner sepals or a little shorter than the latter, spur very short, ca 5.0 mm’. However, both morphological characteristics and molecular evidence suggest that E. tianmenshanense is closely related to E. baojingense, a taxon with a long spur, thus suggesting that the size of the floral parts is not as reliable as previously believed. When investigating the variability of E. tianmenshanense in more detail, in the field as well as in cultivation, we found that the petals were are highly variable in morphology (both shape and size), being cucullate, subulate, short to long spurred, and with various transitions. The flowers size varied from small to large accordingly. The flowers with cucullate and subulate petals, which were a little shorter than the inner sepals or almost as long as the latter, were small (about 0.8 cm in diameter). The flowers with long spurs, which were much longer than the inner sepals, were also large (about 2.5–3.5 cm in diameter). Finally, the flowers with short spurs, which were a little longer than the inner sepals, were medium-sized (about 1.0–1.2 cm in diameter). In addition, the color of inner sepals was revised from ‘white, occasionally light mulberry-purple’ to yellowish green or yellowish white. Epimedium tianmenshanense is a perfect example of natural petal evolution, which could be used for further taxonomic and evolutionary studies. The reason for the variation and the taxonomic treatment of the species still need further study.     

春兰CgSEP3基因的克隆和表达分析

该研究采用RT-PCR和RACE技术从春兰(Cymbidium goeringii)中分离到1个SEPALLATA3(SEP3)基因。序列分析表明,该基因含有1个732bp的开放阅读框(ORF),共编码243个氨基酸。系统进化树分析显示,该基因是MADS-box基因家族AP1/AGL9组SEP的同源基因,其编码蛋白与其它植物SEP3类蛋白具有较高的一致性,命名为CgSEP3(登录号为KF924272)。实时荧光定量分析表明,CgSEP3在春兰花器官中均有表达,其中在唇瓣、侧瓣和萼片中的表达量较高,在子房和蕊柱中的表达量较低;而且CgSEP3在花发育各个时期都有表达,在1~2cm的花芽中表达量最高,在盛开的花中的表达量最低。研究认为,CgSEP3基因可能在春兰花瓣和萼片的形成过程中具有重要作用。     

中国兰科石豆兰属（Bulbophyllum）二新种

对兰科（Orchidaceae）石豆兰属（Bulbophyllum）二新种,副萼石豆兰（B.malipoense Z.J.Liu,L.J.Chen＆W.H.Rao）和小副萼石豆兰（B.minor Z.J.Liu,L.J.Chen＆W.H.Rao）作了描述和绘图。该二新种属于石豆兰属副萼组（Bulbophyllumsection BisetaJ.J.Verm.ex N.Pearce,P.J.Cribb＆J.Renz）,与该组的刺萼石豆兰（B.bisetum Lindl.）相似,区别在于两新种的叶片先端二裂和唇瓣无毛。小副萼石豆兰与副萼石豆兰的区别在于假鳞茎椭圆球形;叶片卵状椭圆形,长1.2～2 cm;侧副萼片较短,长约1 mm;中副萼片几乎与两侧萼片边缘合生。     

Cymbidium quinquelobum,A New Species of Orchidaceae from Yunnan

Cymbidium quinquelobum, a new orchid from Yunnan, is described and illustrated. It is akin to Cymbidium wenshanense Y. S. Wu et F. Y. Liu, from which it differs by having a 5- lobed lip that is fused at base to the basal margins of the column forming a tube 8- 10 mm long .