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- W2941811029 abstract "This study was conducted to make the easy identification methods in early growing stages to seven taxa of the genus Conyza (Conyza conadensis, C. sumatrensis, C. bonariensis, C. parva) and Erigeron (Erigeron annuus, E. strigosus, E. philadelphicus) weeds in korea.In the rosette stage, the hair on petiole and leaf blade were very useful characters for identification of the seven taxa. The length of hair on the petiole of E. strigosus was within 1mm long, while the others were 2∼3mm long. All over the petiole of C. sumatrensis and C. bonariensis were covered with dense hair. In genus Erigeron, only E. philadelphicus was covered with dense hair below part of the petiole.In the bolting stage, distribution pattern, texture, color of hair on stem were very useful characters. The hair patterns on stem were four types as fallows：1) entirely uniform hair of stem, 2) sparsely hair of upward stem and densely hair of downward stem, 3) densely hair of downward stem and densely strigose on the vertical striations, 4) sparsely or densely hair of downward stem and glabrous or shortly sparse hair of upward stem. The stem of E. philadelphicus had hollowed pith, while others were filled solidly with white cancellate tissue. The forms of cauline leaf such as leaf margin and leaf base could be divided into two group; same shape and difference shape by the form of upper and lower leaf. Therefore morphological characters of cauline leaf were very useful characters for identify." @default.
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- W2941811029 date "2008-01-01" @default.
- W2941811029 modified "2023-09-23" @default.
- W2941811029 title "A Taxonomic Study in Early Stage on the Genus Conyza and Erigeron (Asteraceae) Weeds of Korea" @default.
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