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单叶互生

网络simple leaf alternate

单叶互生

单叶互生

单叶互生

simple leaf alternate

... 235 "居间生长” intercalary growth 236 "单叶互生” simple leaf alternate 237 "孢子叶球单性同株” monoecism strobilus ...

2

Leaves alternate, simple , estipulate, bases often oblique .

单叶互生的，无托叶，基部通常偏斜。

3

Stipules absent . Leaves alternate, simple , margin entire, penninerved.

托叶无单叶互生，边缘全缘，羽状脉。

4

Leaves simple , alternate, to 50 cm, with or without persistent or deciduous amplexicaul wings .

单叶，互生，达 50 厘米，有或没有宿存或落叶的抱茎翅。

5

basal leaves up to 30 cm long , oblong , pointed to blunted at apex , cordate at base, margin undulate;

单叶互生，基生叶可达 30 公分长，长椭圆形，先端锐至圆，叶基心形，波状缘；

6

Leaves simple , alternate or basal , sessile or petiolate but petiole usually indistinct from blade ; stipules absent ;

单叶，互生或者基生，无柄或者有柄，但叶柄与叶片不容易区分；

7

leaves simple , alternate , up to 15 cm long , irregularly and pinnately lobed ;

单叶互生，可超过 15 公分长，不规则羽裂；

8

Stipules absent. Leaves alternate, simple, generally crowded near apex of twigs ;

托叶无单叶互生，通常在小枝的先端附近丛生；

9

Leaves simple , alternate or basal , margin entire, dentate, or dissected;

单叶，互生或基生，边缘全缘，具牙齿的，或多裂；

10

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