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  2. Phyllotaxis - Wikipedia

    en.wikipedia.org/wiki/Phyllotaxis

    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. Distichous ...

  3. Glossary of botanical terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_botanical_terms

    alternate 1. (adj.) (of leaves or flower s) Borne singly at different levels along a stem, including spiralled parts. Contrast opposite. 2. (prep.) Occurring between something else, e.g. stamen s alternating with petal s. alternipetalous A configuration where parts of the flower, e.g. stamen s, alternate in position with the petal s. [18] ament

  4. Glossary of leaf morphology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_leaf_morphology

    Chart illustrating leaf morphology terms. The following terms are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (that is, the leaf blade or 'lamina' is undivided) or compound (that is, the leaf blade is divided into two or more leaflets). [1]

  5. Leaf - Wikipedia

    en.wikipedia.org/wiki/Leaf

    Alternate One leaf, branch, or flower part attaches at each point or node on the stem, and leaves alternate direction—to a greater or lesser degree—along the stem. Basal Arising from the base of the plant. Cauline Attached to the aerial stem. Opposite Two leaves, branches, or flower parts attach at each point or node on the stem.

  6. Glossary of plant morphology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_plant_morphology

    Leaf Base Shape: Semiamplexicaul – the leaf base wraps around the stem, but not completely. Leaf Blade Apex: Acuminate – narrowing to a point (a term used for other structures, too). Acute – with a sharp, rather abrupt ending-point. Acutifolius – with acute leaves. Attenuate – tapering gradually to a narrow end. Leaf Blade Margins:

  7. Salicornioideae - Wikipedia

    en.wikipedia.org/wiki/Salicornioideae

    Their stems are glabrous and often apparently jointed. The alternate or opposite leaves are fleshy, glabrous, often basally connate and stem-clasping (thus forming the joints), with missing or short free leaf blades. The spike-shaped inflorescences consist of alternate or opposite bracts, these are often connate and stem-clasping, sometimes ...

  8. Cornus alternifolia - Wikipedia

    en.wikipedia.org/wiki/Cornus_alternifolia

    Its leaves are elliptic to ovate and grow to 2–5 inches (5–13 cm) long and 1–2 inches (25–51 mm) broad, arranged alternately on the stems, not in opposite pairs typical of the majority of Cornus species. The leaves are most often arranged in crowded clusters around the ends of the twigs and appear almost whorled.

  9. Crassulaceae - Wikipedia

    en.wikipedia.org/wiki/Crassulaceae

    The leaf arrangement is opposite and decussate or alternate and spiral, and they are frequently aggregated into rosettes. The leaf shape is simple (rarely pinnate) and usually entire, or crenate to broadly lobed, sometimes dentate or more deeply incised, glabrous (smooth) or tomentose. In cross section the leaf blades are flat or round.