Ординатура / Хирургия / Библиотека им академика М.И. Перельмана / Книга_5569_Библиотеки_им_академика_М_И_Перельмана

Inorescence is racemose that may be lateral, basal or sometimes terminal, may be erect or pendulous, sub-umbellate, spicate or paniculate. One to many owers are present which are infrequently secund or distichously arranged. Flowers are mostly showy but small to large, typically zygomorphic, virtually actinomorphic, hermaph­rodite/bisexual (sometimes monoecious and polymorphic), pedicellate, mostly resupinate with or without pedicel. Sepals are often free but rarely adnate, dorsal (median) is mostly dissimilar to laterals while laterals sometimes adnate to column foot to form a spur like mentum. Corolla has free Petals but hardly adnate to sepals, may or may not be like sepals, mostly showy; lip entire, variously lobed or 2/3 par­tite, ornamented, with or without a lower spur or nectary, margins entire to laciniate. The perianth usually have 6 tepals in two whorls that are similar or different. The outer most whorl of three distinctive or diversely connate tepals are sometimes sepaloid. Two members out of 3 tepals are identical and may be quite like the outer tepals. The third tepal of the same whorl usually forms a labellum that is highly modied in shape as well as in appearance. The androecium and gynoecium are almost always adnate into a column or gynostegium. Anthers are mostly 1, rarely 2 or 3, ventral or terminal on column, cap like or opening by longitudinal slits. Pollen normally form distinct pollinia, rarely loose, pollinia are 2, 4, 6, and 8 may be waxy, or horny, sessile or attached by stalks to 1 or 2 sticky viscidia. Moreover, stigma is 3 lobed, mid-lobe is mostly modied into rostellum, other lobes sunken on ventral surface of column behind the anther. Capsule fruit is present. It is sometimes berry like and opens laterally by three or six slits. Seed are numerous dust-like, infre­quently winged and lack endosperm [15].