英汉词典

pteridosperm 基本解释

n.

种子蕨；

英英释义

pteridosperm

n.an extinct seed-producing fernlike plant of the order Cycadofilicales (or group Pteridospermae)

同义词：seed fern

pteridosperm 相关例句

权威例句

TETRAXYLOPTERIS SCHMIDTII GEN. ET SP. NOV., A PROBABLE PTERIDOSPERM PRECURSOR FROM THE DEVONIAN OF NEW YORK
A contribution to the knowledge of the pteridosperm genera Pseudomariopteris Danzé-Corsin nov. emend. and Helenopteris nov. gen.
A probable pteridosperm from the uppermost Devonian near Ballyheigue, Co. Kerry, Ireland
The chemical composition of Upper Carboniferous pteridosperm cuticles
Systematics of the Late Carboniferous Medullosalean Pteridosperm Laveineopteris and Its Associated Cyclopteris Leaves
Some Pteridosperm Stems and Fructifications with Particular Reference to the Medullosae
An improved method for obtaining large pteridosperm cuticles
Reconstruction of the frond of Laceya hibernica , a Lyginopterid pteridosperm from the uppermost Devonian of Ireland
Revision of the pteridosperm foliage Alethopteris and Lonchopteridium (Upper Carboniferous), Sydney Coalfield, Nova Scotia, Canada
A new pteridosperm from Upper Pennsylvanian deposits of North America