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• <br />• <br />leaves and has wide - <br />topped leaf bases and <br />dull seeds. <br />Najas graminea. <br />Not pictured. A <br />native of the Old <br />World which has run <br />wild in California <br />ricefields. Very <br />bushy with leaves <br />which usually curve <br />out from the stem. <br />Resembles flexilis <br />(page 64); but has <br />dull seeds. <br />Najas guadalupen- <br />sis (Najas muenscheri <br />and olivacea). Oregon <br />to Quebec, California, <br />and Florida. Leaves <br />are shorter than in <br />the other kinds, usu- <br />ally do not curve out- <br />ward, and are not much <br />bunched. When without <br />seeds, guadalupensis <br />resembles underwater <br />forms of Water -star- <br />wort (page 61); but <br />the leaves have <br />sheathing bases. <br />Najas minor. <br />Illinois to Vermont, <br />Alabama, and Florida. <br />A native of Eurasia <br />which in the last <br />forty years has be- <br />come common in the <br />tidal Hudson River <br />and in artificial <br />lakes. Leaves usually <br />curve outward, and <br />their marginal teeth <br />are visible to the <br />naked eye. Unlike <br />the other kinds, its <br />seeds are ribbed <br />lengthwise. <br />Najas guadalupensis, <br />half life -size <br />two times <br />life -size <br />Najas minor, <br />half life -size <br />65 <br />two times <br />life -size <br />