1987
DOI: 10.1017/s0890037x00029018
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Description of Purple and Yellow Nutsedge (Cyperus rotundusandC. esculentus)

Abstract: Both purple nutsedge (Cyperus rotundusL. # CYPRO) and yellow nutsedge (C. esculentusL. # CYPES) are problem weeds in crops in many parts of the world. Yellow nutsedge is found in all U.S. states. Purple nutsedge is confined to the southern region of the United States, ranging from North Carolina across southern Arkansas and into southern California.

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Cited by 81 publications
(68 citation statements)
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“…However, there is considerable disagreement as to its definition (Bell & Tomlinson 1980;Font Quer 1982;Haines & Lye 1983;Bell 1991), which leads several authors to define other stem types, such as stolon, corm and tuber, as rhizome (Wills & Briscoe 1970;Bendixen 1973;Wills 1987;Gifford & Bayer 1995). In the present study, stem classification is based not only on morphology but also on function and life phase.…”
Section: Discussionmentioning
confidence: 78%
“…However, there is considerable disagreement as to its definition (Bell & Tomlinson 1980;Font Quer 1982;Haines & Lye 1983;Bell 1991), which leads several authors to define other stem types, such as stolon, corm and tuber, as rhizome (Wills & Briscoe 1970;Bendixen 1973;Wills 1987;Gifford & Bayer 1995). In the present study, stem classification is based not only on morphology but also on function and life phase.…”
Section: Discussionmentioning
confidence: 78%
“…In Scleria distans and S. leptostachya, the internal cortex corresponded to the uniseriate endodermis, while in the other species, it corresponded to the endodermis and its derivatives. The occurrence of the endodermis in the rhizome of Cyperaceae has already been mentioned by various authors (Eiten, 1969;Wills and Briscoe, 1970;Bendixen, 1973;Govindarajalu, 1974;Wills et al, 1980;Gifford and Bayer, 1995;Rodrigues and Estelita, 2002;Menezes et al, 2005). However, the endodermis with meristematic activity, forming the inner cortex of the rhizome, was uniquely demonstrated by Menezes et al (2005).…”
Section: Discussionmentioning
confidence: 79%
“…According to Holm (1929), due to the difficulty of applying a term which is appropriate for the various underground structures found in Cyperaceae, the term rhizome is used for nearly all the underground stems. Anatomical aspects of the rhizome which are characteristic of some species of the Cyperaceae family have been summarized by Wills and Briscoe (1970), Metcalfe (1971), Bendixen (1973), Wills et al (1980) and Gifford and Bayer (1995). Within the family, the rhizome presents morphological variations, and a thickened axis may occur with reduced internodes and sympodial growth.…”
Section: Introductionmentioning
confidence: 99%
“…Aqueles que se dirigem para cima formam próximo da superfície, uma intumescência que é chamada de bulbo basal, o qual produz manifestações epígeas, raízes e outros rizomas. Os que apresentam geotropismo positivo podem originar tubérculos que repetem o ciclo (Wills, 1987). A maior intensidade reprodutiva da tiririca ocorre no período de 30 a 60 dias após o plantio do tubérculo, onde o peso da parte subterrânea é superior a 50% do peso da parte aérea (Labrada et.…”
Section: Introductionunclassified