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32 Cards in this Set
- Front
- Back
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Leaves that arise singly are called ____.
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alternate leaves
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Leaves that arise in pairs are called ___.
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opposite leaves
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If leaves arise in whorls of 3 or more they are called ___.
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whorled leaves
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Leaves that are closely arranged at the base of an upright stem are called ___.
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basal
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If leaves emerge in ___ along the stem they are called 2-ranked.
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2 lines
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If leaves emerge in 4 lines along the stem they are called ___.
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4-ranked
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The most common way for leaves to emerge is ___.
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in an alternate spiral
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When leaves lack a ___ they are called sessile.
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petiole
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The leaf blade is also known as the ____.
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lamina
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the ____ of the lamina is called the abaxial surface.
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underside or backside
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the ___ of the lamina is called the adaxial surface.
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topside
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The base of the blade is where the ____ and the blade connect.
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petiole
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Small leaf veins come in what three patterns?
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parallel, branching, and reticulate (netted)
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The largest leaf veins are described by what three patterns?
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parallel, palmate, and pinnate
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The most indented point of a leaf margin is called the ___.
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leaf sinus
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The projected part of a leaf or petal margin forms the ___.
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lobe
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A leaf with an unlobed lamina is called an ___ leaf.
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entire
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A saw-like margin of a leaf is said to be ___.
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toothed
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A leaf that is ____ into many narrow deep ____ is said to be disected.
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divided, segments
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The smaller leaf like portions of a compound leaf are called ____.
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leaflets or pinna.
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The ___ is the main axis of the pinnately compound leaf
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rachis
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The stalk of the leaflet in a pinnatley compound leaf is called the ___.
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Petiolule
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A pinnately compound leaf that has two pairs of leaflets per side is called ___.
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double pinnately or twice pinnately compound.
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When compound leaves have three leaflets they are said to be ____ and can either be ____ or ___.
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rifoliate, pinnately trifoliate or palmately trifoliate.
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Cordate leaf bases look like ____.
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hearts
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Reniform leaf bases look like ____.
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kidneys
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Peltate leaf bases are ___ shaped.
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circular
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____ leaf bases are shaped like arrowheads.
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hastate
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Leaf ____ are the hairs on a leaf.
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pubescense
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Plant surfaces without pubescense are called ___.
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glabrous.
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Leaf hairs that excrete a sticky substance are called ____.
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glandular
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The two forms of branched leaf hairs we studied were ___ and ___.
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stellate (star like) and forked.
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