. Class-book of botany: being outlines of the structure, physiology and classification of plants; with a flora of the United States and Canada. Botany; Plants; Plants. 367 Pollen grains. 367, Pinus larico. 368, Basella rubra, mus gramliflorus. 371, Passiflora incarnata. 509. Each grain of pollen is a mem- branous cell or sack containing a fluid. Its coat is double, the outer is more thick and firm, exhibiting one or more breaks where the inner coat, which is very thin and expansible, is uncovered. Iu the fluid are suspended molecules of inconceivable minute- ness, said to possess a tre- mulous
. Class-book of botany: being outlines of the structure, physiology and classification of plants; with a flora of the United States and Canada. Botany; Plants; Plants. 367 Pollen grains. 367, Pinus larico. 368, Basella rubra, mus gramliflorus. 371, Passiflora incarnata. 509. Each grain of pollen is a mem- branous cell or sack containing a fluid. Its coat is double, the outer is more thick and firm, exhibiting one or more breaks where the inner coat, which is very thin and expansible, is uncovered. Iu the fluid are suspended molecules of inconceivable minute- ness, said to possess a tre- mulous motion. When the membrane is exposed to moisture it swells and bursts, discharging its contents. 510. Pollinia. In the Orchids and Silkweed 369 370 9, Ranunculus repens. 370, Scoly-. 872, Section of the. Passion-flower (Passiflora ererulea); ft, bracts of the involucre; *, sepals ; p, petals; a,n, stami nodi a or sterile filaments ; c, stipe; o, ovary; rf, stamens ; t, 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 Wood, Alphonso, 1810-1881. New York, A. S. Barnes & Burr
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Keywords: ., bookcentury1800, booksubjectbotany, booksubjectplants, bookyear18
