|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|W. L. Crepet and K. C. Nixon 1989||Catkins lax, florets (diam 1 mm) in dichasia of 3 or more, perigon lobed, with an indument of elongate simple hairs. Stamens small (less than 0.5 mm in length), bilocular and dosifixed with rounded locules, ca. 6 per floret. Pollen tricolporate, less than 15 micrometers in polar diameter, exine ornamentation fused-vermifor. Pollen wall tectate columellate, 0.87 micrometers thick, foot layer/tectum ratio=0.21.|