2I). pulvini) is a joint-like thickening at the base of a plant leaf or leaflet that facilitates growth-independent (nyctinastic and thigmonastic) movement.Pulvini are common, for example, in members of the bean family Fabaceae (Leguminosae): 185 and the prayer plant family Marantaceae. the base of the tree. Pulvinus. Swelling is the result of fluid buildup that gets trapped in your body's tissues. (f) Cordate-When the two lobes of the leaf base gives a heart-shaped appearance. The lamina is also known as the leaf blade. Rachis. The undivided bases of the leaves are convex on their upper side and concave on their lower side; the margins of the swollen leaf bases are more strongly incurved, forming an open pouch. Leaf stalk. Basal leaves with long petioles with slightly swollen bases (Fig. Leaves are composed of two main parts, the leaf stem, or petiole, and the flat part of the leaf, or lamina. 2D). The main axis of a pinnately compound leaf. (e) Truncate-Here the leaf base with a nearly straight line across the bottom, as if cut across. Even without visible buds or leaves, you can tell where the node of a twig is by some signs that you will only see at a node: a scar in the wood where a leaf has fallen away; The key difference between pulvinus and petiole is that pulvinus is the small swelling present at the base of a leaf, facilitating the movement of the leaf, while petiole is the leaf stalk that connects the leaf blade to stem.. Pulvinus and petiole are two important structures found in plants. A few other terms apply to petioles. Freely forming lateral branches (1 to 1.5 mm wide) in leaf axils diverge from the main stem at 30° to 35°. The identifying feature of this small palm tree is the enlarged trunk that looks swollen at the base. The base of a bud, leaf, twig, or branch is always attached to a node, so this is one easy way to find them. If the petiole has a swollen area at the base, where it joins to the stem, the swollen … The swollen base of a petiole or petiolule. Any more or less tubular portion of the leaf surrounding the stem or culm, as in the Poaceae. Leaflet stalk. Rachilla. Swelling on one side of the neck can be especially concerning because in most cases it forms a lump that is hard to miss. This helps to differentiate this palm species from the Spindle palm which swells in the middle of the fat trunk. Questions of this type are frequently asked in … (g) Auriculate-When leaf base looks like a small ear-like lobe (auricle) on either side of the petiole and the auricles are separated by a narrow sinus. Leaves near reproductive organs have short petioles and swollen bases (Fig. Ultimate leaf segments are about 2 mm long by 0.3 mm wide with rounded tips. Sheath. plus 3239 more questions from Biology. 6. Onions, garlic, and most of their relatives are primarily grown for their underground bulbs-swollen leaf bases-that store energy for the beginning of the next growing season. Petiolule. Most people first notice swelling because the affected body part may appear larger than normal. Questions from Morphology of Flowering Plants Answer with step by step detailed solutions to question from HashLearn's Biology, Structural Organisation in Animals and Plants- "In some , the leaf base may become swollen and is called as ." This leafy liverwort is normally found in higher quality natural areas. Secondary axis of compound leaf. It is responsible for sleep and shock movements of certain leaves, e.g., Mimosa pudica . A pulvinus (pl. Both structures are related to plant leaves. The leaf bases taper toward their bottoms, where they clasp the stems. 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