Zielnik rodologiczny w pracy naukowej

Abstract

The author's suggestions for the collection, preparation, and preservation of wild-growing roses destined for research, have been founded on his own experience and on other publications. The most valuable material is obtained by collecting roses duing three different stages of the vegetation cycle: 1/ the florescence stage (June) 2/ the time after the rosebush has ceased to blossom (July and early August) 3/ the time of hypantium maturation Having this in view one should collect, besides the bourbs with blossom, also those with hypantia, with the proviso that both the former and the latter should be cut out from different parts of the bush; all this should be further supplemented with barren boughs cut out in a way permitting to include into the herbarium their top and central parts. In case when there are sprouts of root tillers, we cut out their base, middle, and top parts. In most cases a properly collected material from the second vegetation period (when the still green "fruit" is supporting the calyx sepals, each variety arranging them in its own way) permits to establish the variety with a great deal of certainty. On this spot we establish and record the following characteristis: the consistency of the leaves, their colour, gloss, the tinge of the corollary petals, the position of the calyx sepals, the scent produced when the nectaries ars triturated, the habit, height, and way of branching of the rosebushes. The plant specimens, collected and properly numbered, are placed inside paper sheets, best of all in a botanical folder. To dry the plants up, they are placed between new dry sheets alternating with blotting-paper. The dried-up collections are put on herbarium sheets, each species getting its own, common cover. If there are specimens collected from one rosebush during the three successive stages of development, specimens from each stage are put into separate covers identically marked, and the whole into a common specific cover. We arrange the files in bunches and keep them in tightly closed chests.