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- W2006913277 abstract "BAKER (1875) in his revision of the tribe 4sparagaceae has, on the basis of the arrangement of the leaves, divided the genus Polygonatum into three groups: Alternifolia, Verticillata, and Oppositifolia. All the species found in North America belong to the first group Alternifolia. The taxonomic division of the American Solomon's seals has been very difficult, as may be seen from the literature dealing with this problem (Eigsti, 1942; Ownbey, 1944). The material on which the present study is based is rather limited. Nevertheless, the observations made seem to throw some new light on the cytotaxonomy of this plant group, and provide a basis for further studies. For material the author is greatly indebted to the following persons who have sent rhizomes of the various Polygonatum strains: Dr. 0. J. Eigsti, Dr. A. Morgan, Dr. R. Tuomikoski, and especially to Dr. Ruth Peck Ownbey and Professor M. Ownbey who sent a large number of plants from their extensive collection in Pullman, Washington. MATERIAL AND METHODS.-The plants were received as rhizomes and cultivated in pots at the State Horticultural Ingtitute, Piikki6, Finland. Root tips were fixed in La Cour's 2BD, embedded in paraffin, and sectioned at 25pt. The slides were stained according to the usual crystal violet-iodine method. Smears of the anthers were also fixed in 2BD and stained using the same technique. Both for root tips and PMC the fixing fluid was cooled to near the freezing point. Such a treatment improved the fixations. Drawings were made with the aid of a Zeiss oilimmersion 1?2in. objective and x30 ocular, and a camera lucida. The magnification was x5000. On reproduction the figures have been reduced to 1/?, thus giving a final magnification of x2500. The diagrams have been based on the mean lengths of the chromosomes as measured from five to ten good metaphase plates where the chromosomes Jay as much as possible in one plane." @default.
- W2006913277 created "2016-06-24" @default.
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- W2006913277 date "1950-06-01" @default.
- W2006913277 modified "2023-10-14" @default.
- W2006913277 title "CHROMOSOME NUMBERS IN AMERICAN POLYGONATUM SPECIES" @default.
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- W2006913277 doi "https://doi.org/10.1002/j.1537-2197.1950.tb08190.x" @default.
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