共查询到19条相似文献,搜索用时 109 毫秒
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报道了中国菊属(Chrysanthemum)一新变种——阔叶毛华菊(Chrysanthemum vestitum(Hem sl.)Stapf.var.latifolium J.Zhou et J.Y.Chen)。本变种与模式变种的区别在于直立生长,并且较多分枝,叶较狭,卵状披针形或匙形,长4~6 cm,宽2~3 cm。花序直径较原种为小,约3.5~4.5 cm。主要分布于湖北宜昌、河南伏牛山山脉。抗旱性较原变种强。而主要原产于安徽西部大别山麓之模式变种则铺散生长,较少分枝,叶圆形、卵圆形,长4~7cm,宽3~5 cm。花序直径较大,约4.5~5.0 cm。 相似文献
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凤翔报春①新变种P.sinoplantagineaBalf.f.var.fengxiangianaW.L.Zheng,var.nov.Avar.sinoplantagineareciditfolismajoribus,12~19cmlongis,1?.. 相似文献
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Cong Zhou Zhaohui Guo Chi Peng Peng Zeng Ataa Fosua Bridget 《International journal of phytoremediation》2021,23(1):80-88
Abstract A sand hydroponic experiment with different concentrations of 0, 5, 10, 20, 40?mg L?1 Cd was used to study the growth and physiological response of Hylotelephium spectabile (Boreau) H. Ohba. and its phytoextraction potential for Cd. The results showed that total plant biomass under 5?mg L?1 Cd treatment was slightly affected. The content of malondialdehyde (MDA) in leaf exposed to Cd was higher, and the POD and CAT activity exhibited a positive response to the low level of Cd addition (5?mg·L?1). The photosynthesis pigments were slightly inhibited, and the ultrastructure of chloroplast remained intact after treatment with 10?mg L?1 Cd. The maximum leaf Cd content (603?mg·kg?1) was found in 5?mg L?1 Cd treatment, then decreased with the Cd level increased. The maximum Cd content in the shoots far exceeds the threshold level (100?mg kg?1) for a Cd-hyperaccumulator plant with the value of translocation factor (TFshoot/root) for Cd reaching up to 5.62. In conclusion, H. spectabile showed normal growth and physiological response and high shoot Cd accumulation under 5?mg L?1 Cd stress, which made it to be a good candidate for phytoextraction of low-level Cd polluted environment. 相似文献
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该文描述了中国广西一新变种——防城蜘蛛抱蛋(Aspidistra arnautovii H.J.Tillich var.angustifolia L.Wu & Y.F.Huang),该变种与原变种A.arnautovii H.J.Tillich var.arnautovii相近,区别在于本变种的叶狭披针形至近线形,宽1.2~2.0 cm,二级脉每边9条,柱头边缘约24浅裂,上表面凸起. 相似文献
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宁夏枸杞属(茄科)一新种和一新变种 总被引:3,自引:0,他引:3
描述了宁夏茄科枸杞属一新种小叶黄果枸杞和一新变种密枝枸杞。小叶黄果枸杞与宁夏枸杞相接近,但前者枝条成"之"字形曲折,叶片较小,条形、条状披针形、条状倒披针形或狭椭圆形,花1~2朵与叶一起簇生于短枝顶端,花萼杯状或筒状,常2浅裂,裂片边缘无毛;花冠筒部与冠檐近等长,雄蕊着生于花冠筒的喉部,花丝连同花冠无毛或在基部仅被稀疏短柔毛,浆果扁球形或椭圆球形,常为淡黄色,近透明,长6~10mm,直径6~8mm,种子5~8枚而与后者明显不同。在外部形态上,小叶黄果枸杞与新疆枸杞和土库曼枸杞也比较接近,但新疆枸杞和土库曼枸杞的枝条不成"之"字形曲折,花常2~3朵或更多与叶一起簇生于短枝顶端,花冠筒部长约为檐部裂片长的2倍,雄蕊着生于花冠筒的近中部,浆果红色。尤其是土库曼枸杞的花萼为宽钟形,常4~5裂,花冠裂片边缘有短而稀疏的缘毛而明显有异于小叶黄果枸杞。宁夏枸杞的变种密枝枸杞与原变种的区别在于前者植株分枝多而密,叶片小,狭长椭圆形、倒披针形或匙形,长1~1.8cm,宽1.5~2.5mm;雄蕊着生于花冠喉部,长短不等,其中两枚较短,其余3枚较长,花丝连同花冠无毛或在基部仅被稀疏短柔毛;浆果卵球形或椭圆形,长5~8mm,直径3~6mm,淡紫色,近透明,多汁,味甜,种子2~4粒。 相似文献
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青海赖草属一新种和一新变种 总被引:8,自引:1,他引:7
1 青海赖草 新种 图1:1~9LeymusqinghaicusL.B.Cai,sp.nov.Fig.1:1~9HaecspeciesL.secalino(Georgi)Tzvel.proxima,aquodiffertspicisbrevibus,6~10cmlongis,brunneisvelbrunneolis,glumisangustelanceolatis,saepe1nervibus,inutroquelatereleviterasymmetricis,paleislemmatibusevidenterbrevi… 相似文献
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报道了新疆赖草属2个新变种,即北疆赖草(Leymus tianschanicus (Drob.) Tzvel. var. borealus L. B. Cai)和短穗赖草(Leymus angustus (Trin.) Pilger var. brevistachyus L. B. Cai)。 相似文献
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发表了黑龙江省东南部产冷杉属一新变种,即粗皮沙松(Abies holophylla Maxim. var. aspericorticea Y. Y. Sun)。 相似文献