. A manual of Indian botany. Botany. MORPHOLOGY Second, dichogamous flowers. Aristolochia indica or isher-mul, champa, Magnolia grandiflora or grand- champa, rangchita (Pedilanthus tithymalotdes, though, strictly speaking, unisexual), are good examples of protogynous flowers. Most of the Malvacecs, such as jaba, dhanrhas, shimool; most of the Umbelliferce, such as dhania or Coriander, juan or Ajowan; most GeraniacecB, such as amrul; most Composites, such as kukur-songa, suryamukhi or Sun-flower; Pink, Por- tulaca grandiflora (common garden plants), bakas {Ad- hatoda Vasica) a wild shrub, commo
. A manual of Indian botany. Botany. MORPHOLOGY Second, dichogamous flowers. Aristolochia indica or isher-mul, champa, Magnolia grandiflora or grand- champa, rangchita (Pedilanthus tithymalotdes, though, strictly speaking, unisexual), are good examples of protogynous flowers. Most of the Malvacecs, such as jaba, dhanrhas, shimool; most of the Umbelliferce, such as dhania or Coriander, juan or Ajowan; most GeraniacecB, such as amrul; most Composites, such as kukur-songa, suryamukhi or Sun-flower; Pink, Por- tulaca grandiflora (common garden plants), bakas {Ad- hatoda Vasica) a wild shrub, common kul, are plants with protandrous flowers. Dichogamy is not confined to hermaphrodite flowers. All monoecious and most dioecious plants are, as a rule, protogynous. For ex- ample, in pituli the female plants flower earlier than the male plants. Third, herkogamous flowers. The floral adapta- tions in most Orchidacece, Labiates, Scrophulariacece, AsclepiadacecB, and Apocynacece are such that self- pollination is wholly impossible. For instance, in most Orchidacece (fig. 102) the centre of the flower is occupied by a column (gynostemium), at the apex of which is situated the single anther with its pollen- grains usually bound together into two pollen-masses or POLLiNiA. Each pollinium is provided with a short stalk or caudicle, and the caudicle ends in a DISK. Immediately below the anther, on the anterior face of the gynostemium, is situated the concave viscid. Fig. 102.—Section of Orchid Flower /. Portion of labellum. st. Stigma. r, Rostellum. j)0, Pollinia, An- ther lobe. ca, Caudicle. d. Disk. jtr, Prolong^ation of Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bose, G. C. London, Blackie & Son Ltd.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbotany, bookyear1920
