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The genus Adenium has been held to contain as many as twelve species. These are considered by other authors to be subspecies or varieties. A late-20th-century classification by Plazier recognizes five species. [5] Species [3] Adenium arabicum Balf.f. = Adenium obesum; Adenium boehmianum Schinz - (Namibia, Angola) Adenium multiflorum Klotzsch.
It is a measure of germination time course and is usually expressed as a percentage, e.g., an 85% germination rate indicates that about 85 out of 100 seeds will probably germinate under proper conditions over the germination period given. Seed germination rate is determined by the seed genetic composition, morphological features and ...
Adenium obesum, more commonly known as a desert rose, is a poisonous species of flowering plant belonging to the tribe Nerieae of the subfamily Apocynoideae of the dogbane family, Apocynaceae. [3] It is native to the Sahel regions south of the Sahara (from Mauritania and Senegal to Sudan ), tropical and subtropical eastern and southern Africa ...
True dormancy or inherent (or innate) dormancy is caused by conditions within the seed that prevent germination even if the conditions are favorable. [7] Imposed dormancy is caused by the external conditions that remain unsuitable for germination [8] Seed dormancy can be divided into two major categories based on what part of the seed produces dormancy: exogenous and endogenous. [9]
Before the operation of a conventional seed drill, hard ground has to be plowed and harrowed to soften it enough to be able to get the seeds to the right depth and make a good "seedbed", providing the right mix of moisture, stability, space and air for seed germination and root development.
There have been several seeds known at different times as the oldest viable seed. Dormancy allows seeds to survive for extended periods, which can aid in seed dispersal and spread out the growth and establishment of seedlings , increasing the likelihood that some of the next generations survive if conditions are not suitable for seedling ...
Seeds are not necessarily 'true to type' meaning that a plant with white flowers may produce offspring with different colours. But Adeniums grown from cuttings tend to be a bit scraggly, so propagating from seeds is the best way to get lovely fat trunks. • Grafting: This is the fastest way to get another adult flowering plant.