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A leaf scar is the mark left by a leaf after it falls off the twig. It marks the site where the petiole attached to the stem. A leaf scar is typically found below a branch, as branches come from axillary buds located above leaf scars. [citation needed] The leaf scar on Ailanthus altissima
Below the leaf scar the leaf-cushion tapered to a basal position. In this tapering area, circular impressions with fine pits were present. These impressions were continuous with the parichnos scars near the top of the tapering portion. This is because the impressions are formed by aerenchyma tissue that developed in closely with the parichnos.
Thaumatophyllum bipinnatifidum (common names: split-leaf philodendron, [1] lacy tree philodendron, selloum, horsehead philodendron, [2] guaimbé [citation needed]) is a plant in the genus Thaumatophyllum, in the family Araceae. Previously it was classified in the genus Philodendron within subgenus Meconostigma.
Thaumatophyllum xanadu is a species of the genus Thaumatophyllum, which previously was the self-heading Meconostigma subgenus of Philodendron. "It differs from all other species of Meconostigma in details of the sexual parts of its spadix, the shape of the leaf scars on the rhizomes, shape of leaf blade, intravaginal squamules, etc".
Bulb – an underground stem normally with a short basal surface and with thick fleshy leaves. Bundle scar – a small mark on a leaf scar indicating a point where a vein from the leaf was once connected to the stem. Caudex – the hard base produced by herbaceous perennials, which serves in overwintering the plant.
Restoration Leaf scars are shown between the vertical sections of a Sigillaria where the leaves used to be attached. Sigillaria was a tree-like plant reaching a height up to 30 m (98 ft), [1] and lycopsids were capable to reach a height of up to 50 m (160 ft). [4] These lycopsids had a tall, single or occasionally forked trunk [2] that lacked ...
Ailanthus altissima (/ eɪ ˈ l æ n θ ə s æ l ˈ t ɪ s ɪ m ə / ay-LAN-thəss al-TIH-sim-ə), [3] commonly known as tree of heaven, ghetto palm, Ailanthus, varnish tree, copal tree, stinking sumac, Chinese sumac, paradise tree, [4] or in Chinese as chouchun (Chinese: 臭椿; pinyin: chòuchūn), is a deciduous tree in the family Simaroubaceae. [1]
The C-shaped leaf scars of white ash are useful in distinguishing this species from the closely related green ash (Fraxinus pennsylvanica). The lateral buds of F. pennsylvanica share a less curved margin with their corresponding leaf scars, imparting an overall D shape to the latter. [8]