. Leaves and flowers : or, Object lessons in botany with a flora : prepared for beginners in academies and public schools . Botany. 32 OBJECT LESSONS IN Fig. 76. PotentiUa anserina; leaf with five out lobes, almost quinate. Fig. 77. PotentiUa tridentata; ternate, with palmate, three-toothed leaflets Fig. 78. Jeffersonia diphylla; a binate leaf. Fig. 79. Lemon ; a simple leaf jointed to the petiole. LESSON VIII. SESSILE LEAVES—FOEMS OP STIPULES. 41. "Wb have already stated (Lesson I., § 6) that many leaves are without petioles (foot-stalks), or, in other words, are sessile. The fi
. Leaves and flowers : or, Object lessons in botany with a flora : prepared for beginners in academies and public schools . Botany. 32 OBJECT LESSONS IN Fig. 76. PotentiUa anserina; leaf with five out lobes, almost quinate. Fig. 77. PotentiUa tridentata; ternate, with palmate, three-toothed leaflets Fig. 78. Jeffersonia diphylla; a binate leaf. Fig. 79. Lemon ; a simple leaf jointed to the petiole. LESSON VIII. SESSILE LEAVES—FOEMS OP STIPULES. 41. "Wb have already stated (Lesson I., § 6) that many leaves are without petioles (foot-stalks), or, in other words, are sessile. The figures presented on page 33 exhibit some of tlie modes of attachment peculiar to sessile leaves. In Fig. 80 (an Aster) you see leaves of the form called spatulate (Lesson in., § 5), having large base lobes nearly clasping the stem at the point of attachment. Such leaves are said to be am- flexicaul (stem-clasping). 42. In the next figure (81, Bellwort) the leaves are ellipti- cal, parallel-veined, and not only clasp the stem at base, but the lobes there grow together on the opposite side, appearing as if the stem passed through the leaf; that is,, perfoliate. 40. What kind of venation have aU these forms ? On the palmate vena^ tion what forms are founded ? 41. "When are leaves said to be sessile? Define an amplexicaul leal 42. Can you define a perfoliate loaf?. 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. A. Barnes
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectbotany, bookyear1869
