| 21. | The Earhart project, involving perennial plants and limestone, is intended to be permanent.
|
| 22. | It is a herbaceous perennial plant growing to 45 centimeters tall.
|
| 23. | It is a herbaceous perennial plant growing to 80 cm tall.
|
| 24. | It is a herbaceous perennial plant growing to 1.8 m tall.
|
| 25. | It is a perennial plant that uses the C3 photosynthesis pathway.
|
| 26. | This herbaceous perennial plant grows to about 20 25 cm high.
|
| 27. | It is an herbaceous perennial plant growing to 1 m tall.
|
| 28. | Phorbol has been isolated from the latex of this perennial plant.
|
| 29. | "Ypsilandra " species are perennial plants that grow from thick rhizomes.
|
| 30. | This distinction is also related to the difference between perennial plants.
|
