茜草科( Rubiaceae)假盖果草属( Pseudopy xis)共3种,分布于中国和日本,其中胀节假盖果草( P 。 monilirhizoma)为近年发表的新种,特产浙江凤阳山。在文献查阅、野外采集和标本整理鉴定的基础上,对产于日本的P 。 dep ressa 、P 。 heterophylla 和特产于中国的胀节假盖果草形态性状进行主坐标分析(PCoA),并对茎的毛被和种子微观形态进行扫描电镜观察。结果表明：在PCoA 散点图中,P 。 heterophylla 和胀节假盖果草不能明显区分,而P 。 dep ressa 与这二者区别明显；P 。 heterophylla 和胀节假盖果草在茎的毛被方面也无区别,但胀节假盖果草种子表面除有纵肋外,还有瘤块状突起,与P 。 heterophylla 有所区别。通过形态性状和种子微观形态分析,认为假盖果属的已有3个种应归并为2个种,将胀节假盖果草作为P 。 heterophylla 的亚种处理,组合为P 。 heterophylla subsp 。 monilirhizoma ( Tao Chen) L 。 X 。 Ye , C 。 Z 。 Zheng & X 。 F 。 Jin 。

Pseudopyxis Miq . , a genus distributed in eastern China and Japan , comprises three species , in which Pseudopyxis monilirhizoma Tao Chen is endemic to China . The variation analysis of the diagnostic characters among these three species of Pseudopy xis was carried out . Based on principal coordinate analysis (PCoA) of eighteen morphological characters , the individuals of P . dep ressa were separated distinctly from P . heterophylla + P . monilirhizoma , whereas the separation between P . heterophylla and P . monilirhizoma was not clear . The observations of stem indumentum and seed micromorphology showed the difference between P . dep ressa and P . heterop hylla + P . monilirhizoma , while that of P . heterophylla and P . monilirhizoma was consistent . In case of the observations of stem indumentum and seed micromorphology and PCoA of morphological characters , P . monilirhizoma is consequently combined as a subspecies of P . heterophylla (Miq .) Maxim . , and the combination of P .

平榛（ Corylus heterophylla Fisch 。）是东北地区的主要经济林树种，其坚果是食用榛子的主要来源。利用平榛进行榛子遗传改良，是培育新品种的重要方法。通过多年的研究总结出一套平榛花粉收集技术，为杂交育种提供了技术的保证。透光率对雄花序生长的影响呈负相关，透光率越低，雄花序开花时间延长，花序也伸的长，花粉产量少；而透光率对花粉产量则相反，透光率越高，雄花序开花时间越短，花粉产量多。雄花生长与花粉产量受种源、水培时间的影响，其差异性显著。

The hazels ( Corylus heterophylla Fisch .) are the major economic foresty species in the north-east region ,their fruits are the main source of nuts in food .The genetic improvement in hazel using C . heterophylla was an important way to cultivate new varieties .Through many years research ,we summa-rized a set of hazels’pollen-gathering techniques ,w hich provided technical guarantee for cross breeding . The growth of the male inflorescence was negatively related to transmittance .When transmittance was lower ,the flowering time of the male inflorescence was extended ,the length of inflorescence was also stretched ,and pollen production was low .On the contrary ,the flowering time of male inflorescence was shorter ,pollen production was more when the transmittance was higher .Male flower growth and pollen production were significantly effected by provenance and the water culture time .

调查寿宁县太子参病害种类,对其发生特点进行介绍,包括太子参花叶病、太子参叶斑病、太子参根腐病、太子参白绢病、太子参紫纹羽病,以供参考。

This paper surveied diseases species of Pseudostellaria heterophylla ( Miq ) l in Shouning County , introduced happen features for reference,such as heterophylla mosaic,heterophylla leaf spot,heterophylla root rot,heterophylla southern blight.

为了解贵阳市乌当区太子参和种植土壤中K、P、S等14种元素的含量,以及元素对太子参道地性的影响,同时为乌当区发展太子参产业提供参考,利用电感耦合等离子体发射光谱和离子体质谱对太子参及其种植地土壤中14种元素含量进行测定分析。结果表明:乌当区太子参中元素含量高低顺序为KPSCaMgNaFeZnCuNiCoMoSn,且对Ca、P和S元素具有明显的富集作用;种植土壤中元素含量高低顺序为FeKMgMnPCaNaSZnNiCuCoMoSn,且对Fe、Mn、P、S、Co、Ni、Cu、Mo和Sn具有一定的富集性。种植土壤与太子参中Na太子参-Na土、Ca太子参-Ca土、Mg太子参-Ca土呈显著正相关,Zn太子参-Fe土、Mn太子参-Ca土、K太子参-Na土、Ca太子参-K土、Na太子参-Co土、Na太子参-Ni土和Na太子参-Cu土呈显著负相关。乌当区太子参道地性与道地产区江苏句容和引种区贵州施秉的较为接近或略有优势。

To understand the 14 elements contents in P .heterophylla and planting soil in Wudang District of Guiyang and the effects on the genuineness of herbs in P .heterophylla,and provide a reference for developing P .heterophylla industry,the 14 elements contents in P .heterophylla and planting soil were determined and analyzed by inductively coupled plasma atomic emission spectrometry (ICP-AES)and inductively coupled plasma mass spectrometry (ICP-MS).Results:The contents in P .heterophylla followed the sequence of K > P > S > Ca > Mg > Na > Fe > Zn > Cu > Ni > Co > Mo > Sn,and P . heterophylla had an obvious enrichment effect to Ca,P and S.The contents in the planting soil was Fe>K>Mg>Mn> P> Ca> Na> S> Zn> Ni> Cu> Co> Mo> Sn,and the soil had an enrichment to the element of Fe,Mn,P,S,Co,Ni,Cu,Mo and Sn.There was a positive significant correlation of the element of Na,Ca and Mg in P .heterophylla separately with Na,Ca and Ca in the soil,and a negative significant correlation of the

对贵阳市乌当区太子参及其种植土壤中稀土元素含量及两者的相关性进行分析。结果表明，研究区太子参和种植土壤中稀土元素含量分布都遵循Oddo-Harkins定律，分布模式极为相似，呈现出极显著的相关性；土壤中稀土元素含量分布规律与中国土壤中稀土元素含量背景值和平均值的分布规律具有很好的一致性；太子参对土壤中稀土元素的富集能力较低，生物富集系数为0.003~0.021；从稀土元素含量分析结果来看，研究区的太子参无论是作为药用或食用，都对人体无害，可以放心使用；从稀土元素的分布模式、轻稀土元素与重稀土元素分馏作用、稀土元素含量等几个方面来看，太子参中稀土元素含量对其种植土壤中稀土元素含量具有一定的继承性。

The contents of rare earth element( REE) of Pseudostellaria heterophylla and planting soil were measured in Wudang district of Guiyang city,and the correlation between them was analyzed. The results showed that the REE content distribution in Pseudostellaria heterophylla and planting soil followed the Od-do-Harkins law,the REE content distribution pattern in Pseudostellaria heterophylla was very similar to that in planting soil,and was significantly related with that in planting soil;the REE content distribution rule in planting soil was consistent with the distribution rule of Chinese REE background value and avera-ge value in soil; the enrichment capacity of Pseudostellaria heterophylla was lower for REE in soil, the REE bioconcentration factors were only from 0 . 003 to 0 . 021; Pseudostellaria heterophylla was harmless and could be safely used as either medicine or edible through the analysis of the REE content;the REE content of Pseudostellaria heterophylla had some inhe