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The leaf is connected to the stem by the leaf trace, which grows through the leaf gap. The leaf gap is a break in the vascular tissue of a stem above the point of attachment of a leaf trace. [1] It exists in the nodal region of the stem as a "gap in the continuity of the primary vascular cylinder above the level where a leaf trace diverges ...
whole leaf: Having the form of a thong or strap lyrate: lyratus: whole leaf: Shaped like a lyre, pinnately lobed leaf with an enlarged terminal lobe and smaller lateral lobes. See also List of lyrate plants. mucronate: mucronatus: leaf tip: Ending abruptly in a small sharp point as a continuation of the midrib [4] multifid: multi + findere ...
According to a 2020 study in the Journal of Political Economy by Clemson University economist Jorge Luis García, Nobel laureate James J. Heckman and University of Southern California economists Duncan Ermini Leaf and María José Prados, every dollar spent on a high-quality early-childhood programs led to a return of $7.3 over the long-term. [12]
"Cladode Anatomy and Leaf Trace Systems in New Zealand Brooms" (PDF). Transactions of the Royal Society of New Zealand. 80: 81– 96. ISSN 0035-9181. Wikidata Q89183321. Brenda F Slade (1953). "Somatic Chromosome Number of the New Zealand Broom Genera and a Discussion of Their Relationship" (PDF). Transactions of the Royal Society of New Zealand.
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Looking up into the branch structure of a Pinus sylvestris tree Animation of zooming into the leaf of a Sequoia sempervirens (Californian Redwood). Plant morphology "represents a study of the development, form, and structure of plants, and, by implication, an attempt to interpret these on the basis of similarity of plan and origin". [4]
A primordium, the nascent leaf, forms at the least crowded part of the shoot meristem. The golden angle between successive leaves is the blind result of this jostling. Since three golden arcs add up to slightly more than enough to wrap a circle, this guarantees that no two leaves ever follow the same radial line from center to edge.
Cotyledon from a Judas-tree (Cercis siliquastrum, a dicot) seedling Comparison of a monocot and dicot sprouting. The visible part of the monocot plant (left) is actually the first true leaf produced from the meristem; the cotyledon itself remains within the seed Schematic of epigeal vs hypogeal germination Peanut seeds split in half, showing the embryos with cotyledons and primordial root Two ...