 | William Somerville Orr - 1855 - عدد الصفحات: 520
...by cellular tissue. The tissues of the veins are brought in closer proximity in the petiole, which is a small stem, and having passed through it into...the wood, and penetrates to the medullary sheath at the centre of the stem. Thus every leaf is in direct communication with the stem, and not only so but... | |
 | United States. Department of Agriculture - 1867 - عدد الصفحات: 752
...up by cellular tissue. The tissues of the veins are brought in close proximity in the petiole, which is a small stem, and having passed through it into...the wood and penetrates to the medullary sheath, at the centre of the stem. Thus every leaf is in direct communication with the stem ; and not only so,... | |
 | United States. Congress. House - 1867 - عدد الصفحات: 770
...by cellular tissue. Tho tissues of the veins are brought in close proximity in the petiole, wiii'-h is a small stem, and having passed through it into...one part enters the bark, whilst the other traverses tho \vood and penetrates to the medullary sheath, at the centre of the stem. Thus every leaf is in... | |
 | United States. Department of Agriculture - 1867 - عدد الصفحات: 736
...by cellular tissue. The tissues of the veins are brought in close proximity in t\ie petiole, which is a small stem, and having passed through it into the stem, one part enters the bark, whilst tho other traverses tho wood and penetrates to the medullary sheath, at tho centre of the stem. Thus... | |
 | Louis Guillaume Figuier - 1867 - عدد الصفحات: 640
...a small stem. Having passed into the stem, one part of the food of the plant enters the bark, while the other traverses the wood and penetrates to the medullary sheath at the centre of the stem. Every leaf is thus in communication with the stem, and not this only : it is,... | |
 | 1876 - عدد الصفحات: 60
...small stem supporting the blades of the leaf), and having passed through it into the stem of the tree, one part enters the bark, whilst the other traverses...the wood and penetrates to the medullary sheath, at the centre of the trunk. Thus, every leaf is in direct communication with the stem, and not only so,... | |
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... which consist of woody tissue, spiral vessels, and cellular tissue, and they are retained in their position and the intervening spaces filled up by cellular tissue. The tissues of the veins are brought in close proximity in the petiole, which is a... 