. Characteristics and hybridization of important intermountain shrubs. Compositae Rocky Mountains; Shrubs Rocky Mountains; Sunflowers Great Basin; Shrubs Great Basin. Because neither the hot water nor the chemical treatments proved effective, subse- quent efforts on section Tvidentatae of Artemisia were in the form of mass pollination in white bakery bags or white, woven Terylene fabric bags (fig. 2). (Other types of pollination bags trapped excessive heat and humidity that caused excessive damage or death of enclosed plant tissue.) Four treatments were made: (1) a control where the bags were
. Characteristics and hybridization of important intermountain shrubs. Compositae Rocky Mountains; Shrubs Rocky Mountains; Sunflowers Great Basin; Shrubs Great Basin. Because neither the hot water nor the chemical treatments proved effective, subse- quent efforts on section Tvidentatae of Artemisia were in the form of mass pollination in white bakery bags or white, woven Terylene fabric bags (fig. 2). (Other types of pollination bags trapped excessive heat and humidity that caused excessive damage or death of enclosed plant tissue.) Four treatments were made: (1) a control where the bags were placed over some inflorescences and not opened again until the pollination season was over; (2) an intrapopulation treatment where an inflorescence containing pollen was inserted into the bag from another plant from the same accession; (3) an interpopulation treatment where pollen from another taxon was inserted into the bag-- two of these were made on each plant; and (4) an open pollination where no bag was placed on the inflorescence but it was marked with a string so an equivalent seed source could be collected. After pollen was inserted, all bags were shaken to facilitate pollination. This practice was continued every 2 or 3 days for about 10 days. About 3 or 4 weeks after pollinations, the bags were opened. The plants were monitored until seeds were ripe and about to shatter, at which time the seeds were collected. Seeds were cleaned in a forced-air seed separator. They were then counted in petri dishes with centimeter squares marked on the bottom. Exact counts were made when no more than 100 seeds were produced. Higher numbers (up to 5,000) were estimated by randomly distributing the seed in the petri dishes, counting a known area of the dish, and extrapolating. To test differences in pollination treatments, an analysis of variance followed by a multiple-range test was employed (Woolf 1968). CHARACTERISTICS OF THE GENUS 4ft7E/W/SM (SAGEBRUSH) Artemisia is a large genus of
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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
