basal sheath造句

例句与造句

1. They have " pseudostems " formed by the tightly wrapped basal sheaths of their leaves.
2. Leaves are narrow and linear, up to 17 mm ( 0.7 inches ) long, with a basal sheath wrapping around the stem.
3. The gracefully arching flower spike, which can be up to 20 inches long, emerges from the base of a recently matured pseudobulb along the centre-line of the upper basal sheath.
4. The genus " Poa " includes both leaves are narrow, folded or flat, sometimes bristled, and with the basal sheath flattened or sometimes thickened, with a blunt or hooded apex and membranaceous ligule.
5. Unlike other seagrasses, the leaves of some species of " Halophila " do not have basal sheaths ( i . e . the bases of the leaves do not wrap around the stem to form a sheath ).
6. It's difficult to find basal sheath in a sentence. 用basal sheath造句挺难的