1) Aculeus 2) Acumen 3) Apophyseal 4) Apophysis 5) Cognation 6) Fuzz 7) Haustorium 8) Matrilineage 9) Peristome 10) Podetium 11) Tomentose 12) Tomentum 13) Tuberculate 1) Cognation 2) Maternal kinship 3) Matrilineage 4) Unilateral descent 
Enations are scaly leaflike structures, differing from leaves in their lack of vascular tissue. They are created by some leaf diseases. Also found on some early plants such as Rhynia, where they are hypothesized to aid in photosynthesis. ...
outgrowth; extension
A symptom caused by certain plant viruses in which there are small outgrowths on the plant. 
• (n.) Any unusual outgrowth from the surface of a thing, as of a petal; also, the capacity or act of producing such an outgrowth.
(from the article `lower vascular plant`) Stem appendages known as leaves take various forms that evolved independently in different groups of lower vascular plants. The simplest are ...
An epidermal outgrowth. ... (09 Oct 1997) ... 
An abnormal outgrowth (often on the leaf) often induced by virus infection, caused by an increase in cell numbers (hyperplasia) e.g. gall formation
E·na'tion noun (Botany) Any unusual outgrowth from the surface of a thing, as of a petal; also, the capacity or act of producing such an outgrowth. 
a small outgrowth of plant tissue, usually on a leaf, caused by virus infection.