. Gray's school and field book of botany. Consisting of "Lessons in botany," and "Field, forest, and garden botany," bound in one volume. Botany; Botany. and dissemination by four club-shaped threads attached to one part of them. These are hygrometric : when moist they are rolled up over the spore ; when dry they straighten, and exhibit lively movements, closing over the spore when breathed upon, and unrolling promptly a moment after as they dry. (See Fig. 493-498.) 486. Ferns, or Filices, a most attractive family of plants, are very numerous and varied. In warm and equable
. Gray's school and field book of botany. Consisting of "Lessons in botany," and "Field, forest, and garden botany," bound in one volume. Botany; Botany. and dissemination by four club-shaped threads attached to one part of them. These are hygrometric : when moist they are rolled up over the spore ; when dry they straighten, and exhibit lively movements, closing over the spore when breathed upon, and unrolling promptly a moment after as they dry. (See Fig. 493-498.) 486. Ferns, or Filices, a most attractive family of plants, are very numerous and varied. In warm and equable climates some rise into forest-trees, with habit of Palms; but most of them are peren- nial herbs. The wood of a Fern-trunk is very dif- ferent, however, from that of a palm, or of any exogenous stem either. A section is represented in Fig. 500. The curved plates of wood each ter- FlG. 493. Upper part of a stem of a Horsetail, Equisetum sylvaticum. 494. Part of the head or spike of spore-oases, with some of the latter taken off. 495. View (more enlarged) of under side of the shield-shaped body, hearing a circle of spore* cases. 496. One of the latter detached and more magnified. 497. A spore with the attached arms moistened. 498. Same when dry, the arms extended. Fio. 499. A Tree-Fern, Dioksonia arborescens, with a young one near its base. In front a common herbaceous Fern (Polypodium vulgare) With its creeping steir or rootstock. Fio. 500. A section of the trunk of a 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 Gray, Asa, 1810-1888; Gray, Asa, 1810-1888. Elements of botany for beginners and for schools; Gray, Asa, 1810-1888. Field, forest, and garden botany. New York : American Book Co.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1887
