无毛的

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

蓝金刚鹦鹉的眼睛具有金色的眼眶。

Stem straight, glabrous, muricate near nodes.

茎直，，粗糙的近的节。

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略似翼的，，微柔，短柔，绒的，通常后脱落。

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

灌木小乔木，通常直立，很少倾斜攀援的，，很少短柔，枝经常刺。