There are four kinds of products:powered,granular,nubbly and over-slender,which are widely used in the field of rubber,pesticide,paint,fodder,vinylite,adhesive and so on.
Terrestrial ferns; stipes tuft, backlish at base; young fronds pinnaye with wider pinnae, when getting older, the fronds become bipinnate or tripinnatifid with slender pinnules.
A slender prolongation of the receptacle between the carpels as a central axis, as in the fruits of some members of the Umbelliferae (Apiaceae) and the Geraniaceae.
Celt section of race is more , mark of umbrella-type section , slender acanthopanax section , the composite family , red-spotted stonecrop section, and kingcup section etc.