Terminology Question

Mt Zion, IL(Zone 5b)

Can someone tell me what the difference is between a 'peduncle', an 'umbel', and a 'rachi'? I don't know what the difference is and I'm sure I'm interchanging the words incorrectly.
Is there a diagram or picture or something somewhere that shows all the "parts & pieces" of a hoya & it's flowers and what they are called?
Inquiring minds just wanna know.
THANKS

League City, TX(Zone 9a)

Peduncle is the flower stem upon which the buds form. Umbel is the term for the shape of the flower cluster itself.

Umbel - flat or round topped inflorescense in which numerous stalked flowers are terminally born from a single point (the peduncle).

The pedicels are the individual stalks which support each flower.

The rachis forms at the base of the peduncle and is defined as the main axis of an inforescense. We see it as a "ring" at the base of the peduncle or multiple rings for each time it's bloomed.

Somewhere I started photos to make these parts easy to see. Let me see if I can find them. There are also some great drawings in several issues of The Hoyan which I can scan at work.

Susan

Long Beach, CA

Susan...be careful about scanning and posting pictures from a publication unless you get the author's permission first.
I don't know anything about copyright rules on drawings, but I imagine they are the same as for pictures, and I'm sure she would hear about it pronto if you posted them in here.
Marcy

Mt Zion, IL(Zone 5b)

Susan - Thanks for the 'education'! As I read this, I sat here and drew up my own picture so I think I have it down. Thanks for taking the time to " ....'splain it to me Lucy"!! =0)
Bets

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