Both structures are related to plant leaves. (f) Cordate-When the two lobes of the leaf base gives a heart-shaped appearance. This helps to differentiate this palm species from the Spindle palm which swells in the middle of the fat trunk. 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. Pulvinus. A pulvinus (pl. Stipels. Rachilla. Rachis. In many legumes, leaf base is swollen, it is known as pulvinus. The swollen base of a petiole or petiolule. Leaves are composed of two main parts, the leaf stem, or petiole, and the flat part of the leaf, or lamina. If the petiole has a swollen area at the base, where it joins to the stem, the swollen … Sheath. Freely forming lateral branches (1 to 1.5 mm wide) in leaf axils diverge from the main stem at 30° to 35°. Ultimate leaf segments are about 2 mm long by 0.3 mm wide with rounded tips. Petiolule. 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. It is responsible for sleep and shock movements of certain leaves, e.g., Mimosa pudica . A few other terms apply to petioles. plus 3239 more questions from Biology. Most people first notice swelling because the affected body part may appear larger than normal. the base of the tree. Questions of this type are frequently asked in … The base of a bud, leaf, twig, or branch is always attached to a node, so this is one easy way to find them. (e) Truncate-Here the leaf base with a nearly straight line across the bottom, as if cut across. Leaflet stalk. 6. The lamina is also known as the leaf blade. 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; (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. This leafy liverwort is normally found in higher quality natural areas. 2D). But when the tip bud dies or is removed, many axillary buds (in the the angle between each leaf and its parent twig) and dormant buds (in the living wood under the bark) are activated, and the cambium may be stimulated to produce new adventitious buds (usually in response to wounding). Secondary axis of compound leaf. At the top of the 10 ft. (3 m) high trunk are 3 or 4 huge palm leaves. The main axis of a pinnately compound leaf. Basal leaves with long petioles with slightly swollen bases (Fig. 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. Swelling on one side of the neck can be especially concerning because in most cases it forms a lump that is hard to miss. The leaf bases taper toward their bottoms, where they clasp the stems. 2I). The identifying feature of this small palm tree is the enlarged trunk that looks swollen at the base. Questions from Morphology of Flowering Plants Swelling is the result of fluid buildup that gets trapped in your body's tissues. Leaves near reproductive organs have short petioles and swollen bases (Fig. Any more or less tubular portion of the leaf surrounding the stem or culm, as in the Poaceae. 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