Amorphophallus nicolsonianus (Araceae), a new species from India

Amorphophallus nicolsonianus species nova, with cylindrical or napiform corms, is the only representative of the sect.Rapyogkos in India. All the other hitherto known species of this region have globose or depressed globose corms. The new species is related to some Indochinese species and toA. hildebrandtii ( Engl.)Engl. & Gehrm. from Madagascar.     

Pothos crassipedunculatus,a new species ofPothos sect.Allopothos (Araceae) from India

Pothos crassipedunculatusSivadasan & Mohanan (Araceae), a new species closely related to the SW. Indian endemic and little known speciesP. thomsonianusSchott is described. It is characterized by the the non-ligulate, shortly vaginate petiole, thickly peduncled inflorescence, broadly ovate spathe and a sessile spadix. It is included in ser.BrevivaginatiEngler of sect.AllopothosSchott.     

马尾南星--中国广西中部天南星科一新种

马尾南星　新种图 1:1- 4ＡｒｉｓａｅｍａｈｉｐｐｏｃａｕｄａｔｕｍＳ .Ｃ .ＣｈｅｎｅｔＨＬｉ,ｓｐ ,ｎｏｖ .Ｆｉｇ.1:1- 4ＨａｅｃｓｐｅｃｉｅｓｓｐａｄｉｃｉｓｍａｓｃｕｌｉａｐｐｅｎｄｉｃｅｐｌｕｓｍｉｎｕｓｖｅｈｉｐｐｏｃａｕｄａｔｉｆｏｒｍｉＡ ｂａｌａｎｓａｅＡ .Ｅｎｇｌ.ｓｉｍｉｌｉｓ,ａｂｅｏｄｉｆ ｆｅｒｔｆｏｌｉｉｓｄｕｏｂｕｓｍｉｎｏｒｉｂｕｓａｔｑｕｅｆｌｏｒｅｍａｓｃｕｌｏｄｉａｎｄｒｏ .Ｆｏｌｉａｄｕｏ ;ｐｅｔｉｏｌｕｓ 5 5 - 6 5ｃｍｌｏｎｇｕｓ ;ｌａｍｉｎａｔｒｉｓｅｃｔａ …     

Two new species of Araceae tribe Spathicarpeae from Bolivia

The tribe Spathicarpeae is one of the most poorly known-tribes in the Araceae. Recently, field collections in some areas of Bolivia have revealed many interesting members of this tribe. Two new species,Gorgonidium striatum Hett., P. L. Ibisch &; E. G. Gonç. andSpathantheum fallax Hett., P. L. Ibisch &; E. G. Gonç. are here described, illustrated, and compared to their closest relatives.     

Oberonia wynadensis, a new species of Orchidaceae from India

Oberonia wynadensis is described from India. It belongs to the subgenus Oberonia and is related to O. acaulis and O. verticillata in having the flowers arranged in whorls.     

Ixora sivarajiana, a new species of Rubiaceae from India

Ixora sivarujiana sp. nov., frcm Vellarimala on the Northern part of the Western Ghats of Kerala in Peninsular India is described and illustrated.     

Hygrocybe rubida,a new species from Kerala State,India

Hygrocybe rubida, a new species in subsection Squamulosae of section Coccinea, collected from tropical evergreen forests of Western Ghats of Kerala is formally described. The species is characterized by a bright red, dry pileus and stipe; ovoid to subamygdaliform spores; a distinctly sterile lamella-edge with crowded cheilocystidia and a trichodermial pileipellis.     

天南星属植物的花粉形态

利用扫描电镜对天南星科天南星属（Arisaema)8组25种植物的花粉进行研究（其中,12种前人未观察过,12种中11种为我国特有）。结果显示：本属花粉形态基本一致,即球形,无萌发孔,无覆盖层,具微刺,是一个非常自然的类群。但各个种在花粉粒大小,刺长,刺的形状,刺基部上径,刺的密度和刺间纹饰方面差别较大,可以作为区别种的依据。这进一步证实了前人的结论。花粉形态支持学者们关于天南星属是本科最进化的类群之一的观点。天南星属花粉可能由线花组从花粉大小适中、刺密度居中向大或小、密或疏的方向发展;刺间表面纹饰对探讨组间演化关系意义不大。Murata等对于花粉刺间具较密颗粒为曲序组特征的界定可疑;把A.yunnanense Buchet、A.bathycoleum Hand.-Mazt.和A.prazeri Hook.f.归入曲序组似乎不妥。A.consanguineum Schott和A.fraternum Schott的花粉形态没有支持李恒对这两个种的归并。     

Seed germination patterns in green dragon (Arisaema dracontium,Araceae)

Arisaema dracontium (green dragon) is a perennial herb that is widely distributed in eastern North America. However, in Canada, at the northern edge of its distribution, the species is designated as “vulnerable” with respect to conservation status. In natural populations, seedlings are uncommon; the present study was undertaken in order to characterize seed and seedling properties in green dragon. Seeds were sampled from five sites, ranging from Ontario at the northern limit of the distribution range, to Louisiana in the south. Seed germinability ranged from 25 to 55%, depending upon source. Experiments indicated that neither the hard seed coat nor a water-soluble exudate from the seed was responsible for inducing or maintaining dormancy. Patterns of seed germination appear to reflect general climatic conditions at the sites where seeds had originated. Cold stratification at 3°C produced significantly greater relative germinability in all seed collections except the most southerly one, from Baton Rouge. These seeds also had a slower overall speed of germination. In contrast, germination of seeds from the most northerly site was promoted by cold stratification and occurred over a relatively brief period. Germination in alternating light and dark conditions decreased the speed of germination compared to germination in the dark, however exposure to light changed the phenology of germination by promoting development of adventitious roots and primary leaves in these seedlings.     

Cryphodera kalesari,a new heteroderid nematode species from Haryana,India

Cryphodera kalesari n. sp., recorded on Colebrookea oppositifolia Sm. from the Kalesar forests (Haryana), India, is described. Females: swollen, saccate, with two to three lip annules, with vulval lips protruding. Second stage juveniles: length 384±19 m, spear=26.5±1 m, tail 46.5±6 m, hyaline portion 21.5±2.5 m, en face dorsal and ventral arcs of head skeleton bifurcate. Males: not found.