<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>Polygonum</title> <meta content="text/html; charset=UTF-8" http-equiv="content-type"/> </head> <body> <p>A diagnostic key to of the <i>Polygonum</i> species occurring in Turkey follow.</p> <p>1. Annuals with slender root system.......................................................................................................................................................2</p> <p>- Perennials with thick and woody root system..................................................................................................................................17</p> <p>2. Achenes longer than tepals; shore plants.................................................................................................................... <i>P. mesembricum</i></p> <p>- Achenes at most slightly longer than tepals; usually land plants.......................................................................................................3</p> <p>3. Tepals 3–4 mm long; leaves 12–45 mm long, quickly deciduous...................................................................................... <i>P. bellardii</i></p> <p>- Tepals usually shorter than 2.5 mm long; leaves average 5–25 mm long not quickly deciduous......................................................4</p> <p>4. Ochrea without veins..........................................................................................................................................................................5</p> <p>- Ochrea veined.....................................................................................................................................................................................6</p> <p>5. Leaves revolute, obovate; plants usually erect......................................................................................................... <i>P. cappodocicum</i></p> <p>- Leaves flat, linear to lanceolate; plants prostrate..................................................................................................... <i>P. polycnemoides</i></p> <p>6. Tepal pouched at base....................................................................................................................................................... <i>P. buxiforme</i></p> <p>- Tepal smooth, not pouched.................................................................................................................................................................7</p> <p>7. Inflorescence short and congested, spike like; mostly growing in dunes or fine-grained soil........................................ <i>P. arenarium</i></p> <p>- Inflorescence long and loosely arranged; mostly growing in land.....................................................................................................8</p> <p>8. Most of middle leaves up to 2 mm wide............................................................................................................................................9</p> <p>- Most middle leaves wider than 2 mm...............................................................................................................................................14</p> <p>9. Internodes very short and covered by leaf and ochrea; achenes usually black......................................................... <i>P. rottboellioides</i></p> <p>- Internodes not covered by leaf and ochrea; achenes brown to dark brown......................................................................................10</p> <p>10. Flowers solitary in axils of scarious bracts; leaves subulate to filiform, 0.5 mm wide................................................ <i>P. salsugineum</i></p> <p>- Flowers 1–3 in axils of leaflike bracts; leaves 0.8–2.2 mm wide.....................................................................................................11</p> <p>11. Short and sterile shoots present; the edges of the leaves here are folded longitudinally; fruiting tepals suburceolate to urceolate................................................................................................................................................................................................ <i>P. urnigera</i></p> <p>- Sterile shoots absent; leaves flat or rarely somewhat folded; fruiting tepals at most suburceolate (some perennials e.g. <i>P. karacae</i>) but usually adjacent at the tip or open..............................................................................................................................................12</p> <p>12. Longest pedicel 2.0– 2.5 mm, longer than tepals............................................................................................................ <i>P. pulchellum</i></p> <p>- Longest pedicel usually shorter than 2 mm, shorter than tepals.......................................................................................................13</p> <p>13. Tepal tube about as long as the lobes; ochrea 3–8 mm long......................................................................................... <i>P. arenastrum</i></p> <p>- Tepal tube much shorter than the lobes; ochrea 6–12 mm long...................................................................................... <i>P. rurivagum</i></p> <p>14. Inflorescence usually 4–6 flowered; veins usually not branched on tepals at fruiting time.............................................................15</p> <p>- Inflorescence usually 1–3 flowered; veins branched on tepals at fruiting time...............................................................................16</p> <p>15. Leaves fresh green; ochrea 8–10 mm; pedicels 1.5–3.0 mm; achenes tuberculate........................................................... <i>P. aviculare</i></p> <p>- Leaves bluish-green; ochrea 4–8 mm; pedicels 1–2 mm; achenes smooth................................................................ <i>P. argyrocoleon</i></p> <p>16. Leaves 25–40 mm; ochrea 7–9 mm; achenes 2–2.5 mm..................................................................................................... <i>P. patulum</i></p> <p>- Leaves 4–35 mm; ochrea 4–8 mm; achenes 1.2–1.8 mm................................................................................................ <i>P. neglectum</i></p> <p>17. Shore plants; ochrea longer than nodes.......................................................................................................................... <i>P. maritimum</i></p> <p>- Land plants; ochrea usually shorter than nodes.................................................................……….……………….……….……... 18</p> <p>18. Ochrea 3–nerved, entirely membranous and equal or longer than internodes................................................................. <i>P. cognatum</i></p> <p>- Ochrea (5–)10–nerved, tube brownish, shorter than internodes.......................................................................................................19</p> <p>19. Leaf-like bracts absent towards the top............................................................................................................................... <i>P. karacae</i></p> <p>- Bracts similar to leaves but shorter..................................................................................................................................................20</p> <p>20. Ochrea and leaves overlapping; the plant looks whitish due to hyaline ochrea; leaves mucronate; tepals 1–1.5 mm long................................................................................................................................................................................................. <i>P. paronychioides</i></p> <p>- Not as above.....................................................................................................................................................................................21</p> <p>21. Leaves quickly deciduous at flowering time; plant prostrate with some shoots erect............................................... <i>P.</i> e <i>quisetiforme</i></p> <p>- Leaves not deciduous at flowering time; plants usually strict..........................................................................................................22</p> <p>22. Prostrate or stoloniferous plants with 40–150 cm tall; inflorescence present on short and third shoots........................... <i>P. longipes</i></p> <p>- Plants suffrutescent with hard woody stocks; inflorescence usually on main shoots......................................................................23</p> <p>23. Tepals shorter than 2.5 mm long......................................................................................................................................................24</p> <p>- Tepals longer than 2.5 mm long.......................................................................................................................................................27</p> <p>24. Stem and leaves ashy–glaucous; tepal with sparse pink glands near the base............................................................. <i>P. praelongum</i></p> <p>- Stem and leaves green; tepal unglandular........................................................................................................................................25</p> <p>25. Inflorescence a lax, elongated spike; leaves overlapping at the base; tepals 1.7–2.0 mm long.................................... <i>P.</i> s <i>alebrosum</i></p> <p>- Inflorescences densed, like a head or congested spike; leaves loosely not overlapping; tepal 2.0– 2.5 mm long............................26</p> <p>26. Stem 15–70 cm; 2–4 flowers in fascicle; pedicels 1–3 mm................................................................................................ <i>P. melihae</i></p> <p>- Stem 21–32 cm; 5–7 flowers in fascicle; pedicels 3–5 mm............................................................................................ <i>P. afyonicum</i></p> <p>27. Leaves pustulate; achenes longer than tepals.............................................................................................................. <i>P. istanbulicum</i></p> <p>- Leaves smooth; achenes shorter or at most equal to tepals..............................................................................................................28</p> <p>28. Flowers sessile or rarely with at most 1.5 mm pedicel..................................................................................................... <i>P. sivasicum</i></p> <p>- Flowers obviously pedicellate..........................................................................................................................................................29</p> <p>29. Leaves usually 10 mm wide and strongly revolute at the margin.................................................................................... <i>P. luzuloides</i></p> <p>- Leaves 4–5 mm wide on average and flat or slightly revolute margin.............................................................................................30</p> <p>30. Ochrea not veined; tepals 3.5–4.5 mm long; achenes equal to slightly longer than tepals............................................ <i>P. ekimianum</i></p> <p>- Ochrea strongly veined; tepals 2.5–3.5 mm long; achenes slightly shorter than tepals...................................................................31</p> <p>31. Leaves usually undulate margin; achenes brown......................................................................................................... <i>P. samsunicum</i></p> <p>- Leaves flat margin; achenes blackish.................................................................................................................................. <i>P. setosum</i></p> </body> </html>