73 research outputs found
Biological flora of Central europe: Baldellia ranunculoides (Alismataceae)
Baldellia ranunculoides (L.) Parl. (Alismataceae) is a taxonomically problematic aquatic plant with an historically ill-defined distribution and global conservation status. This paper finds morphological, ecological and molecular evidence for two distinct taxa, probably best described as subspecies: (1) B. ranunculoides subsp. ranunculoides and (2) B. ranunculoides subsp. repens and provides detailed distribution data on their overlapping range, in different habitats, across the cool, high rainfall areas of western Europe and west Mediterranean. The two subspecies are amongst the relatively large number of threatened European and north Africa aquatic plants and this paper provides a systematic review of their relative conservation pressures and management needs, with particular emphasis on the status of both taxa in central Europe. Other observations indicate probable evolutionary relationships within B. ranunculoides s.l. and its associated taxa and the review points out where these and other research topics could potentially be pursued
Studies on pigment-activating substances in animals I. The separation by paper electrophoresis of chromactivating substances in arthropods
The morphology and anatomy of the neuro-endocrine complex of Galeruca tanaceti (L.) (Coleoptera: Chrysomelidae)
Studies on pigment-activating substances in animals I. The separation by paper electrophoresis of chromactivating substances in arthropods
Action de la glande ventrale sur le développement ovarien de Locusta migratoria L. (Orthoptera)
Studies on the neursecretory system of the female mole cricket Gryllotalpa africana (Orthoptera: Gryllotalpidae)
Insect chromatophorotropic factors: The isolation of polypeptides from Periplaneta americana and Apis mellifera with melanophore-dispersing activity in the crustacean, Uca pugilator
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