. A manual of Indian botany. Botany. 234 CLASSIFICATION Adenostemma viscosum Is the common barha-keshutti, a weed; Wedelia calendulacea is the keshraj of Indian kavirajes; Elephantopus scaber, Grangea maderas- patana, Sphceranthus indicus, Ccesulia axillaris, Cen- tipeda orbicularis, Crepis j'aponica, Sonchus oleraceus, &c., are some of the common weeds. Siegesbeckia orientalis (fig. 201) is a shrub with five highly glan- dular, sticky, spreading, spathulate involucral bracts, common in Chhota Nagpur and Dera Dun. The small flowers of this family are rendered con-. Fig. 201.—Siegesbeckia o
. A manual of Indian botany. Botany. 234 CLASSIFICATION Adenostemma viscosum Is the common barha-keshutti, a weed; Wedelia calendulacea is the keshraj of Indian kavirajes; Elephantopus scaber, Grangea maderas- patana, Sphceranthus indicus, Ccesulia axillaris, Cen- tipeda orbicularis, Crepis j'aponica, Sonchus oleraceus, &c., are some of the common weeds. Siegesbeckia orientalis (fig. 201) is a shrub with five highly glan- dular, sticky, spreading, spathulate involucral bracts, common in Chhota Nagpur and Dera Dun. The small flowers of this family are rendered con-. Fig. 201.—Siegesbeckia orientalis i, Glandular involucre. spicuous by being aggregated together into heads. The effect is heightened by the ray-florets being often ligulate and differently coloured from the disk-florets. Another effect of crowding is that numerous flowers of the same head are simultaneously pollinated by insects which creep over them in search of nectar or pollen. In the first stage of flowering (anthesis) the anthers, and in the second stage of flowering the stigmatic papillae, are so far above the general bend of the head that insects must rub against them and cross- pollinate them. But in several cases self-pollination is possible and does take place, for the branches of the style bend back and apply to the stigmatic papillae the pollen still clinging to the sweeping hairs of the. 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
