The florets are arranged in a centripetal manner on the receptacle, i.e., the outer flowers are older and open earlier than the inner ones. In this type of inflorescence the main axis or receptacle becomes suppressed, and almost flat, and the flowers (also known as florets) are sessile (without stalk) so that they become crowded together on the flat surface of the receptacle. This inflorescence (umbel) is characteristic of Apiaceae (Umbelliferae) family. Sometimes, the umbel is un-branched and known as simple umbel, e.g., Brahmi (Centella asiatica). Generally the umbel is branched and is known as umbel of umbels (compound umbel), and the branches bear flowers, e.g., in coriander (Coriandrum sativum), fennel, carrot, etc. Some are in compound spikes (i.e., in wheat-Triticum aestivum), others are in racemes (e.g., in Festuca), while some are in panicles (e.g., in Avena). Spikeletes are arranged in a spike inflorescence which is composed of several to many spikelets which are combined in various manners on a main axis called the rachis. In this type of racemose inflorescence the main axis remains elongated and the lower flowers are older, i.e., opening earlier than the upper ones, as found in raceme, but here the flowers are sessile, i.e., without pedicel or stalk, e.g., amaranth (Amaranthus spp.), latjira (Achyranthes aspera), etc.Įach spikelet may bear one to several flowers (florets) attached to a central stalk known as rachilla. The stalk of the individual flower of the inflorescence is called the pedicel. The main axis of the inflorescence together with the latest axes, if present, is termed as the peduncle. When the main axis of raceme is branched and the lateral branches bear the flowers, the inflorescence is known as compound raceme or panicle, e.g., neem (Azadirachta indica), gul-mohar (Delonix regia), etc. The lower or older flowers possess longer stalks than the upper or younger ones, e.g., radish (Raphanus sativus), mustard (Brassica campestris), etc. Solitary axillary: If single flower develops from the axis of leaves and branches of plant, then the inflorescence will be solitary axillary.ĭefinition of scorpioid cyme.In such cases the main axis remains elongated and it bears laterally a number of stalked flowers. Solitary terminal is the inflorescence in which single flower of the terminal part of growth. Then, what is solitary axillary inflorescence? When the tip of the shoots is gets transformed into a flower only one single flower will be formed. Secondly, when a shoot tip transforms into a flower it is always solitary? what is meant by when shoot tip is modified into flowers, the flower is always solitary. A flower that is not part of an inflorescence is called a solitary flower and its stalk is also referred to as a peduncle. The stalk of each single flower is called a pedicel.
When the stem or the axil of the leaf shows a 'single flower' that is joint on the pedicel, the flower is referred to as Solitary Cyme.Īn inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. The arrangement of flowers on the 'floral axis' is known as inflorescence.
Explanation: Solitary cyme of hibiscus is the type of inflorescence that the hibiscus flower possesses.
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