Inflorescences-examples

Racemose inflorescences result from monopodial growth. Six examples are shown here. Numbers indicate the order in which the flowers are added as the inflorescence grows. Raceme (lupin) is the basic racemose structure. Spike (verbascum) is a raceme but with sessile (no stem) flowers. Panicle (privet) is a raceme with a branched racemic stem at each node. Corymb (whitebeam) is a raceme with different length flower stems. Umbel (hogweed) is a raceme with all flower stems from the same point but with different lengths to give a flat flower head. This is one of the secondary umbels of the Hogweed. Capitulum (dandelion) is a flattened raceme found in many plants of the Aster family.

 

 

lupin raceme
verbascum spike
privet panicle
whitebeam corymb
hogweed umbel
dandelion capitulum

Some examples of Cymose inflorescences are shown here. The first two are monochasial (one flower at each node) in the form of scorpioid cymes. The first is  Wood Forget-me-not and the  second Russian ComfreyThe third (Snow-in summer) and fourth (Stitchwort) are  dichasial  (two flowers at each node). A compound cyme is one in which there is an initial branch and then one or more branches.

forget-me-not scorpioid cyme
scorpioid cyme
comfrey scorpioid cyme
snow-in summer monochasial cyme
dichasial cyme
stitchwort dichasial compound cyme
dichasial compound cyme