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Bulbs are a combination of stem and leaves so may better be considered as leaves because the leaves make up the greater part. Caespitose: When stems grow in a tangled mass or clump or in low growing mats. Cladode (including phylloclade): A flattened stem that appears leaf-like and is specialized for photosynthesis, [4] e.g. cactus pads.
stem attachment: A round leaf where the petiole attaches near the center, e.g. a lotus leaf perfoliate: perfoliatus: stem attachment: With the leaf blade surrounding the stem such that the stem appears to pass through the leaf perforate: perforatus: leaf surface features Many holes, or perforations, on leaf surface. Compare with fenestrate ...
The stems and basal leaves sprout from a stout branched woody base. At the base of the plant, the elliptic to ovate leaves may be up 10 cm (4 in) long and 2 cm (3 ⁄ 4 in) wide and born on long petioles. The flowering stem also has pairs of similar but smaller leaves that lack a petiole and clasp the stem.
The leaves are spirally arranged on the stems, simple, palmately lobed with 5–13 lobes, 20 to 40 centimetres (8 to 15 + 1 ⁄ 2 in) across. The flowers are produced in dense umbels 10 to 20 cm (4 to 8 in) diameter, each flower small, with five greenish-white petals.
With an opposite leaf arrangement, two leaves arise from the stem at the same level (at the same node), on opposite sides of the stem. An opposite leaf pair can be thought of as a whorl of two leaves. With an alternate (spiral) pattern, each leaf arises at a different point (node) on the stem. Distichous leaf arrangement in Clivia
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In botany, a rosette is a circular arrangement of leaves or of structures resembling leaves. In flowering plants, rosettes usually sit near the soil. Their structure is an example of a modified stem in which the internode gaps between the leaves do not expand, so that all the leaves remain clustered tightly together and at a similar height.
The leaf and stem epidermis is covered with pores called stomata (sing; stoma), part of a stoma complex consisting of a pore surrounded on each side by chloroplast-containing guard cells, and two to four subsidiary cells that lack chloroplasts. The stomata complex regulates the exchange of gases and water vapor between the outside air and the ...