#Umbelliform cyme definition portable#
2008: Mabberleys plant book, a portable dictionary of plants. ± woody, composed of capsule and hypanthium, usually with loculicidal dehiscence, and teeth of valves included or exserted from hypanthium rim viable seeds 2- c. Fls in single or paired, axillary, usually pedunculate umbelliform cymes. Ovary 2-several-celled, surrounded by nectary disc ovules numerous style minute and inconspicuous or prominent. modified depending on species), and inflorescences (cyme, raceme, umbel, or.
#Umbelliform cyme definition free#
Stamens numerous, > petals, in 2 or more whorls, free or clustered into 4 groups anthers versatile, dorsifixed or sub-basifixed and opening by discrete or confluent slits, or ± basifixed and opening by terminal pores connective often prominent. Petals 5, always fused to form an operculum shed at anthesis. The corolla is sympetalous with 5 convolute (rarely valvate or imbricate) lobes. The calyx is usually synsepalous (at least basally) with 5 imbricate or valvate lobes. The flowers are usually bisexual, actinomorphic, and hypogynous. The modifications can involve the length and the nature of the internodes and the phyllotaxis, as well as variations in the proportions, compressions. The inflorescence is a cyme (often umbelliform in Asclepiadoids), raceme, or of solitary flowers. Flowers 312(18) in umbelliform cymes, semi-homostylous scapes. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed. It is an effective means of seed dispersal by zoochory, through which the plant has. Hypanthium wholly or partly enclosing ovary sepals free or fused to form an operculum. An 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. inflorescence in these species sometimes is a simple dichasial cyme.
Fls in single or paired, axillary, usually pedunculate umbelliform cymes, or paniculate and terminal, or occasionally solitary. and then the inflorescence apparently umbelliform (e.g.B. Lvs opposite for at least the first few pairs on juvenile plants, otherwise alternate, with aromatic oil glands. The main kind of cymose inflorescence is the cyme (pronounced 'saim', from the French cime in the sense ‘top.
Another kind of definite simple inflorescence is the raceme-like cyme or botryoid that is as a raceme with a terminal flower and is usually improperly called 'raceme'. Trees, shrubs or mallees, usually glabrous in adult stage. Strictly speaking this kind of inflorescence could be called umbelliform cyme, although it is normally called simply 'umbel'.
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