. Botany of the living plant. Botany; Plants. 042 BOTANY OF THE LIVING PLANT Family : Solanaceae. Examples s Nightshade, Potato. (36) The Deadly Nightshade (Atropa Belladonna, L.) is a perennial herb of shrubby habit, with entire leaves having a clammy glandular surface. It bears its flowers solitary in the axils of leafy bracts. The whole inflorescence, which is cymose, starts with a single terminal flower : below this strong branches develop, the ultimate branchings of which are complicated by adhesions. The flower consists of : Calyx, sepals 5, gamosepalous, inferior ; the odd sepal is post
. Botany of the living plant. Botany; Plants. 042 BOTANY OF THE LIVING PLANT Family : Solanaceae. Examples s Nightshade, Potato. (36) The Deadly Nightshade (Atropa Belladonna, L.) is a perennial herb of shrubby habit, with entire leaves having a clammy glandular surface. It bears its flowers solitary in the axils of leafy bracts. The whole inflorescence, which is cymose, starts with a single terminal flower : below this strong branches develop, the ultimate branchings of which are complicated by adhesions. The flower consists of : Calyx, sepals 5, gamosepalous, inferior ; the odd sepal is posterior. Corolla, petals 5, gamopetalous, inferior, alternating with the sepals ; very slightly zygomorphic. I. • Fig. 493. Solatium tuberosum. I. flower. II. pistil, and persistent calyx. III. stamen with porous dehiscence. IV. seed in median section. V. floral diagram. Androecium, stamens 5, hypogynous, epipetalous ; filaments curved. Gynoecium, carpels 1, syncarpous, superior, placed obliquely to the median plane ; style elongated, stigma capitate, ovary bilocular, ovules numerous, placentation axile. A honey-disc surrounds the base of the ovary. Fruit, a large black berry, surrounded by the persistent green calyx. Seeds albuminous, embryo curved. Pollination. The colour and honey-secretion offer attractions to bees, especially humble-bees, while the gamopetalous corolla and the stiff hairs at the base of the filaments tend to exclude small crawling insects. The stigma and anthers mature almost simultaneously. The stigma projects beyond the curved stamens, thus there is a probability of cross-pollination from visits from humble-bees, but the flower is not highly specialised. (37) The Potato (Solatium tuberosum, L.) is an herbaceous plant that reproduces itself by tubers (Fig. 147, p. 218). But it commonly flowers also in cymose inflorescences, which are without bracts. The flowers of the cultivated varieties are apt to show abnormalities. The normal structure is like Atr
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