| 21. | It has acuminate leaves with teeth along the margins, and solitary white flowers.
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| 22. | They have no obvious veining and end in a sharp point ( acuminate ).
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| 23. | It shows slender and unidentate blades within acuminate, with tiny subdistal spines present.
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| 24. | They are scarious ( membranous ) and acuminate ( pointed ) at the tips.
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| 25. | The lanceolate shaped bractlets are in two series, with the apices acuminate in shape.
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| 26. | They have membranous edges and acuminate ends.
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| 27. | Leaves simple, opposite; ovate or elliptic ovate; base rounded; apex acuminate.
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| 28. | Their leaves have entire margins, usually have rounded bases, and sometimes have acuminate tips.
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| 29. | Stipules lanceolate, lacerate, acuminate.
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| 30. | The shell is elongate-acuminate.
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