中国广西石灰岩地区苦苣苔科一新种——鹿寨唇柱苣苔

描述了中国广西石灰岩地区苦苣苔科(Gesneriaceae)1新种--鹿寨唇柱苣苔(Chirita luzhaiensis Yah Lin,Y.S.Huang & W.B.Xu).该种与桂林唇柱苣苔(Chirita gueilinensis W.T.Wang)相似,但叶面被长柔毛和短柔毛,花药无毛,花丝近基部膝状弯曲,退化雄蕊3枚,无毛,花期12月至次年1月可与后者区别.目前,鹿寨唇柱苣苔仅见于广西鹿寨县中渡镇的两个石灰岩山洞中.     

桂林唇柱苣苔和百寿唇柱苣苔的开花动态及花粉活力和柱头可授性的比较

对桂林唇柱苣苔的两个居群(YZ居群和DB居群)和百寿唇柱苣苔的开花动态、花粉活力和柱头可授性进行了比较研究。结果表明,桂林唇柱苣苔的两个居群花期、单花持续期存在明显差异,DB居群的花期较YZ居群晚,但花期长于后者。YZ居群的花期、单花持续期与百寿唇柱苣苔的花期、单花持续期相近。三者开花过程相似。花粉活性和柱头可授性达最大的时间、持续时间在桂林唇柱苣苔的两个居群以及百寿唇柱苣苔之间具有明显差异。     

光华唇柱苣苔

记载了广西苦苣苔科Gesneriaceae一新变种--光华唇柱苣苔Chirita tribracteata W. T. Wang var. zhuana Z. Y. Li, Q. Xing &; Y. B. Li。该变种与原变种不同在于叶大而厚, 边缘具圆齿或牙齿, 叶柄具宽翅, 苞片宽倒卵形或倒披针形, 有锯齿, 花冠淡紫色, 喉部具黄色纵纹。     

广西唇柱苣苔属(苦苣苔科)一新变种——光华唇柱苣苔

记载了广西苦苣苔科Gesneriaceae一新变种——光华唇柱苣苔Chirita tribracteata、W．T.Wang var.zhuana Z．Y．Li,Q．Xing＆Y．B．Li。该变种与原变种不同在于叶大而厚,边缘具圆齿或牙齿,叶柄具宽翅,苞片宽倒卵形或倒披针形,有锯齿,花冠淡紫色,喉部具黄色纵纹。     

湖南唇柱苣苔属三新种

本文发表于湖南的唇柱苣苔属三新种:宽脉唇柱苣苔Chirita latinervis W.T.Wang、新宁唇柱苣苔C.xinningensis W.T.Wang和粗筒唇柱苣苔C.crassitubaW.T.Wang。     

假烟叶唇柱苣苔——中国广西石灰岩地区苦苣苔科一新种

报道了广西石灰岩地区苦苣苔科唇柱苣苔属(Chirita Buch.-Ham.ex D.Don)1新种--假烟叶唇柱苣苔(C.pseudoheterotricha T.J.Zhou.B.Pan & W.B.Xu).该种在叶型上与烟叶唇柱苣苔(C. heterotricha Merr.)较相近,但不同在于根状茎节间长2～8 mm,叶片和叶柄两面密被腺毛,侧脉3～4条,整个花序被开展的腺毛,花萼裂片披针形,花冠裂片长圆形,花丝在中部扭曲,密被紫色腺毛.     

中国广西唇柱苣苔属(苦苣苔科)一新种——黄花牛耳朵

报道了在广西发现的苦苣苔科唇柱苣苔属Chirita一新种,即黄花牛耳朵C.lutea Yan Liu & Y.G.Wei.黄花牛耳朵的体态和叶形与牛耳朵(C.eburnea)相似,但前者聚伞花序俯垂,花冠黄色,花药与退化雄蕊先端密被白色绵毛.     

中国广西苦苣苔科一新种--灵川小花苣苔

报道了在广西岩溶洞穴发现的苦苣苔科Gesnenaceae小花苣苔属Chiritopsis一新种——灵川小花苣苔C．lingchuanensis Yah Liu＆Y.G.Wei。本种因聚伞花序花稀疏,花冠白色,明显二唇形,上唇比下唇短3倍以上,退化雄蕊3而与羽裂小花苣苔C.bipinnatifida W .T．Wang相近,区别在于前者叶不裂,雄蕊被短柔毛。本种在叶形上还与小花苣苔C.repandaw T.Wang相近,不同在于后者花冠不明显二唇形,上下唇近等长,雄蕊无毛,退化雄蕊2。灵川小花苣苔的分布范围狭窄,目前仅见于一个岩溶洞穴的近洞口段,具明显的洞生习性。     

刺齿唇柱苣苔的离体快速繁殖

1 植物名称刺齿唇柱苣苔(chjrjta spjnujosa). 2材料类别 幼叶.     

桂林唇柱苣苔传粉生物学及生殖配置研究

对桂林唇柱苣苔在不同生境下（YZ居群,半野生,林下裸露岩石上;DB居群,洞穴岩石上）的生殖生态学进行了比较研究。结果表明：（1）桂林唇柱苣苔的花期为2月下旬至4月中旬,受环境因素的影响,单花期在DB居群（16~24 d）明显长于YZ居群（10~17 d）;（2）两个居群的P/O比差异显著,花粉量比胚珠量有更明显的变化,这可能与其生境有关;（3）桂林唇柱苣苔属于兼性异交系统,不存在无融合生殖现象;(4)传粉和种子后熟阶段均存在限制,致使各种处理的结实率均处在较低的水平（<45％）;（5）白颊尤垫蜂与小蜂类(DB居群)或蜜蜂(YZ居群)为桂林唇柱苣苔较为稳定的传粉者;（6）桂林唇柱苣苔植株个体越大,花期繁殖投入就越高,繁殖分配越低;（7）与DB居群相比,YZ居群可利用资源较为丰富、植株生物量较大,因此其花期投入繁殖也较高,而DB居群将更多的资源分配给营养器官,从而提高了对资源获取能力。     

四花球兰,云南球兰属(夹竹桃科萝藦亚科)一新种

描述了产自云南的球兰属一新种四花球兰(Hoya tetrantha J. F. Zhang, Y. H. TongN. H. Xia)。该种为附生灌木,具有一年生的顶生花序和小型叶片,而与产自缅甸的狄克森球兰(H. dickasoniana P. T. Li)相似,但该种叶片卵形至阔卵形,先端锐尖,具短尖头,花序通常具4朵花,萼片线形且较长而与后者区别。     

Hemiboea lutea sp. nov. (Gesneriaceae) from Guangxi,China

Hemiboea lutea F. Wen, G. Y. Liang & Y. G. Wei, a new species in Gesneriaceae is described and illustrated from Guangxi, China. It differs from the similar species H. cavaleriei by having sessile or subsessile leaves, longer peduncles (6–10 cm), spheroidal or triangular‐spheroidal subinvolucre, 5‐divided calyx with lobes fused for 1/3 of their length, revolute and uncinate apex of calyx lobes, larger bright yellow corolla (5–7 cm long), longer staminodes with indistinctively uncinate anther and longer pistil (3.5–3.7 cm).     

Didymocarpus dissectus sp. nov. (Gesneriaceae) from Fujian,eastern China

A new species of Gesneriaceae, Didymocarpus dissectus Fang Wen, Y. L. Qiu & Y. G. Wei, from Fujian province, China, is described and illustrated. It is similar to D. heucherifolius in flower shape, but can be easily distinguished by leaf blade shape, split extent of calyx and equal calyx lobes, indumentum of corolla and number of staminodes.     

Symplocos saxatilis (Symplocaceae), a new dioecious species from Serra do Cipó, Minas Gerais, Brazil

Symplocos saxatilis from Serra do Cipó, Minas Gerais State, Brazil, is newly described and illustrated on the basis of field and herbarium studies. It appears to be restricted to “campo rupestre” (rocky field) habitats. This new species is characterized by its 1- to 3-flowered pedunculate inflorescence, 11 to 14 staminodes of the pistillate flowers, and 0.7–1.5 mm thick endocarp.     

贵州悬钩子属(蔷薇科)一新种--务川悬钩子

报道了贵州省务川县发现的悬钩子属Rubus（蔷薇科Rosaceae）一新种——务川悬钩子R．wuchuanensis S．Z．He。该种在体态上与锯叶悬钩子R．wuzhianus L．T．Lu＆Boufford相近,区别在于其叶片卵状披针形,边缘疏生小锯齿;叶柄较短,长0．7-1cm;花序为顶生稀疏总状花序,具花8-10朵：花梗长3．55cm;花瓣先端具骤突尖头。     

A Revision of the Genus Siratitia Merr. and Two New Genera of Cucurbitaceae

Two new genera are described while a systematic study on the genus Siraitia (s. l. ) is made. Siraitia Merr. (s. 1. )contains seven or eight species, some of which were placed in the genus Thladiantha Bunge(Cogniaux 1881, 1916, Jeffrey 1962)until 1981 (Lu & Zhang 1981 ). Though Siraitia as a genus was des cribed in 1934, it has not been properly circumscribed up to now. Siraitia (Jeffrey 1980)was divided into three subgenera (Zhang & Lu 1989)which in this study are raised to three genera: namely Baijiania1） A. M. Lu et J. Q. Li, gen. nov., Microlagenaria (C. Jeffrey) A. M. Lu et J. Q. Li, gen. nov. and Siraitia Merr. Baijiania is clearly discriminated from Siraitia by non-glandular scales, entire leaf-blades racemose, 5—8-flowered male inflorescences, large, heterogeneous, glabrescent or sparsely hairy sepals, reniform anthers , wingless seeds thick extine and chromosome number 2n = 32. The genus Microlagenaria, which is only distrib uted in Africa is situated between Baijiania and Siraitia in phylogeny, but more closely related to the latter (Plants with glandular scales; leaf-blades 3-5-obed; male inflorescences racemose, many-flowered; sepals small, triangular; anthers reniform, curved; female flowers solitary or 8-13-flowered, clustered on a short (2cm) peduncle). A key to the genera is as follows: 1. Plants without glandular scales 2. Tendrils coiling above the forking point, anthers erect, 2n= 18 ........................................................ 1. Thladiantha 2. Tendrils coiling both above and below the forking point; anthers curved, 2n= 32 .................................................. 2. Baijiania 1. Plants with glandular scales 3. Leaves 3--5-lobed, anthers curved, seeds wingless ........................... ....................................................... 3. Microlagenaria 3. Leaves entire, anthers S-shaped, folded, seeds winged 2n= 38... 4. Siraitia     

Flower structure and potential bisexuality in Freycinetia reineckei (Pandanaceae), a species of the Samoa Islands

In Freycinetia reineckei the staminate flower (on the staminate spikes) comprises 3 or 4 (sometimes 2) stamens and a pistillode with 2 (sometimes 4) carpellodes, and the pistillate flower (on the pistillate spikes) is formed of a pistil with 2 (sometimes 4) carpels and of 3 or 4 (sometimes 2) staminodes. This perfect floral homology, also observed in all the other species that were studied with both pistillate and staminate material, strongly suggests that the flower of Freycinetia is basically and potentially bisexual, and may explain the occasional sexual lability and bisexuality of that flower (occurrence of both pistillate and staminate inflorescences, and/or of bisexual inflorescences with bisexual flowers and/or unisexual flowers, on the same individuals) in some species, and also the frequent occurrence of bisexual spikes in this species. These may be partitioned into pistillate, staminate, mixed and sterile zones. In the pistillate zones the flowers have the same aspect and structure as the pistillate flowers. In the staminate zones the flowers generally comprise 3 or 4 (sometimes 2) stamens and a ‘semi-pistil’ some have both stamens and staminodes. The semi-pistils are intermediate between pistils and pistillodes in length, aspect and structure, but always have placentas and ovules. In the mixed zones the flowers are generally formed of a pistil and 3 or 4 (sometimes 2) stamens, and are therefore true hermaphrodite flowers; some have both stamens and staminodes. In the sterile zones the flowers comprise a semi-pistil and 3 or 4 (sometimes 2) staminodes. The staminodes are anatomically very similar to the stamens, especially in the staminate, mixed, and sterile zones, in which they exhibit a wide range of variation in length, aspect and structure. The perfect floral homology as generic character on one hand, and the occasional bisexuality both with and without bisexual flowers and other aspects of sex expression (e.g. occurrence of both pistillate and staminate shoots on the same individuals) in some species on the other hand, seem to indicate that Freycinetia is a basically monoecious, sex changing genus.