Abstract: Proper ecological analysis of a group of plants requires special efforts, and is certainly quite out of the scope of the present work. However, there is rich material from various sources as literatures, personal observations from trips a field and especially from the great number of field notes on herbarium specimens. Although there is possibility of a certain amount of misrepresentation in the field notes, yet as a whole, it would worth the attention of a systematist even merely as a collection of data of the group of plants under study, not to mention that upon careful comparison, it does reveal something that would otherwise be unknown to us. Similar to the treatment in altitudinal distribution, the data are here arranged in phyletic sequence. Before going on to supply the tabulation of ecological data, a mention first of the particular, semiparasitic or saprophytic habits in a number of species seems to be a necessity, for a character of such important physiological bearing on the plants under study certainly should not be amiss in the course of such a topic. This well-known nature of the genus has supplied Vorkart l) the subject of his study, which has been referred to by Hegi, 2) who himself gives some interesting remarks in this regard as following: Auch die Arten der Gattung Pedicularis sind gleich den iibrigen Rhinanthoideen Halbsch maroter, die sich auf Wurzeln mit Saugwurzeln festsaugen. Die Wirtpfianzen sind vorzugsweise Si. issgraser und Cyperaceen, doch auch anderer Moor und Wiessenpflanzen (z. B. Succia pratensis, Salix repens, Equisetum palustre, etc.). Wahrend einzelne Spezies (z. B. Pedicularis palustris und foliosa) auf verschiedenen Wirtspflanzen auftretten, zeigen anderen Arten eine ausgesprochene Vorliebe fiir bestimmte Arten. So bevorzugt Pedicularis recutita in den AIwn Deschampsia caes- pitosa, P. verticillata dagegen Sesleria caerulea. Bezuglich der Ausniitzung der Wirtspflanze ver- halten sich die einzelnen Pedicularis-Arten verschieden; manche entnehmen denselben nur Wasser und Naihrsalz, andere hingegcn daneben auch nech organische Verbindungen und k6nnen dann den Untergang der Wirtspflanze herbeifüre.” From the above quotation, we may have some idea about the nature of this particular trait of Pedicularis and the complexity involved in its study.