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(Of domatia) resembling tufts of hairs (as in some Rubiaceae).  

When all the flowers of a head have tubular corollas [unusual term, not recommended].  

Cylindrical and hollow. Forming an elongate hole cylinder. Elongated and hollow. Describes a flower with united petals forming a tube. Narrow, cylindrical, and tube-like. Tube-shaped; pertaining to or occurring within a small tube or tubule.  

Shaped like a tube or cylinder.  

A thickened root resembling a tuber.  

Warty; Covered with knobbly or wart-like protuberances. With tubercles, that is processes. (Of spores) Roughened with rounded bumps.  

A small tuber, used for any small growth (hypothetically) associated with symbiotic organisms; A small rounded protuberance on a bone. For example, there are two tubercles at the upper end of the humerus. (In ball- or barrel-shaped cacti), cone-shaped protuberances that are enlarged modified leaf bases fused with adjacent stem tissue. A small excrescence. Round…

A hollow cylinder. A long, hollow, cylindrical structure. Particular tubes are fisted under the first word.  

Hair with a base stalk attached to an upper part, which is held at right angles to the base stalk and ± parallel to the surface from which the base stalk sprouts.