. A manual of structural botany; an introductory textbook for students of science and pharmacy. Plant morphology. VENATION OR NBRVATVRE 185 The forms all fall within two principal classes, which, in general, characterize respectively the monocotyledons and the dicotyledons. The former bears its principal veins more or less parallel with one another, and these are numerous. Such leaves are called Parallel- veined (Fig. 526).. Venation or Nervature: Fig. 524, Pinnately veined leaf of Castanea: a, midrib; b, secondaries: o, tertiaries. 525. Reticulate leaflet of Pilocarpus: a, anastomosis of seco
. A manual of structural botany; an introductory textbook for students of science and pharmacy. Plant morphology. VENATION OR NBRVATVRE 185 The forms all fall within two principal classes, which, in general, characterize respectively the monocotyledons and the dicotyledons. The former bears its principal veins more or less parallel with one another, and these are numerous. Such leaves are called Parallel- veined (Fig. 526).. Venation or Nervature: Fig. 524, Pinnately veined leaf of Castanea: a, midrib; b, secondaries: o, tertiaries. 525. Reticulate leaflet of Pilocarpus: a, anastomosis of secondaries. 526. Parallel-veined leaf of Convallaria. 527. Flabellately costate leaf of Plantago. 528. Digitately veined leaf of Cercis. 629. Costinerved leaf. In the second form there is but one, or a comparatively few original veins, and these give rise to successively developed branch systems, the whole forming a network or Reticulum. Such leaves are called reticulated or Netted-veined (Fig. 524, etc.). These veins may or may not anastomose or intercommunicate at their distal ends. When they. 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 Rusby, Henry Hurd, 1855-. Philadelphia and New York, Lea & Febiger
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherphila, bookyear1911
