无毛的

Young stems terete to frequently 4-angled or subalate, glabrous, puberulous, pubescent, or tomentose, often glabrescent.

嫩茎圆柱状到经常地四棱形或略似翼，无，被微柔，短柔，或被绒，通常后脱。

The eye of a blue macaw is surrounded by a featherless golden rim.

刚鹦鹉眼睛具有色无眼眶。

Stem straight, glabrous, muricate near nodes.

茎直，无，粗糙近。

Shrubs or small trees, usually erect, rarely viny or climbing, glabrous, rarely pubsecent, branches often inermous.

木或小乔木，通常直立，很少倾斜或攀援，无，很少短柔，枝经常无刺。