Category: C

The tube formed when the petals are fused together below.  

A plant that is introduced, occurs sporadically, only persisting in any given population for a short time and has not become naturalised. A casual species is therefore dependent on constant re-introduction. An alien or introduced plant that occasionally grows wild in places but cannot maintain itself for long.  

A condition caused by either excessive amounts of an adrenal hormone (cortisol) in the blood or excessive administration of a synthetic hormone (corticosteroid), which results in an altered body appearance and often hypertension. An endocrine disorder usually affecting young women, produced by over-secretion of cortisone and marked by mood swings, irritability, agitation, physical disfigurement, obesity,…

A congenital, localized constriction or narrowing of the aorta resulting in hypertension in the upper body (above the constriction) and low blood pressure in the lower body (below the constriction). A pressing together or narrowing of a blood vessel, occurring primarily in the aorta. Constricting or narrowing, especially with reference to a congenital defect of…

A group of fern sori that have coalesced to look like a single large sorus.  

Developing from the margin towards the middle.  

Crassulacean acid metabolism is a carbon fixation pathway specific to some plants growing under arid conditions. These plants collect CO2 only during the night which is stored as a 4-carbon malate; during the day, when stomata are closed, this is transported to chloroplasts where it is converted to CO2 and then used for conventional photosynthesis…

A metabolic pathway during photosynthesis in which CO2 is incorporated into a 4-carbon organic acid, which has the ability to regenerate CO2 in chloroplasts aggregated in bundle sheath cells that then utilise this CO2 to generate carbohydrates the conventional way, but saving water in the process.  

A metabolic pathway during photosynthesis in which carbon is fixed by converting a 5-carbon sugar (ribulose biphosphate) and CO2 into 3-phosphoglycerate.