Mindblown: a blog about philosophy.

Membrane surrounding the spore.  

Food storage tissue of some seeds formed from the nucellus, i.e. the layer outside the endosperm.  

Outside edge. The outside of an organ. The regions of the body where the nerves end, such as the sense organs or the muscles. The surface of something. The outer part or surface of a body; the part away from the center.  

On the edge. Near the surface or outside, as in peripheral circulation. Pertaining to an outside surface. To the outside, surface, or area away from the center of an organ or of the body.  

When the sepals, petals and stamens are carried up around the ovary on a hypanthium. When the petals and stamens are borne on the calyx.  

(In Cyperaceae) a membrane or sac enclosing the female flower and later the fruit. Arranged around the pistil.  

Adjective of perigon.  

Loosely synonymous with the living bark, the outermost layer of stems and roots (the dead bark is known as rhytidome) consisting of the cork or bark cambium, the phellogen, from which is produced the phellem (from the outer surface) and the phelloderm (from the inner surface). A thin layer of flattened cells forming a transient…

(In Compositae/Asteraceae) the involucre surrounding the common receptacle of the capitulum.