tomentum造句怎么写

Branchlets with sparse woolly tomentum; abaxial veins of leaves with white hairs and with sparse arachnoid tomentum.

There were plenty of tomentum on the cultivated LEC surface.

Flowers solitary and terminal, 8-10 cm in diam., sessile; bracts 3; sepals 5, obovate, covered with caduceus tomentum outside; petals 6-8, white, obovate, 3-4.5 cm long, connate at base, outmost 2 hairy; stamens numerous, distinct, 1.7 cm long; ovary hairy, styles 3.