pulvinus


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pulvinus

a mass of thin-walled cells at the base of the leaf petiole in certain plants, forming a swollen area surrounding the vascular tissue. The pulvinus is subject to large changes in TURGOR. For example, in the runner bean the pulvinus is turgid during the day and supports the petiole, so that the leaf is held outwards. At night the pulvinal cells loose turgidity and the leaf droops. These diurnal leaf positions are sometimes called sleep movements. The sudden change in leaf posture observed in Mimosa sensitiva when touched is also controlled by pulvinal cells.

pulvinus

cushion, pad.

pulvinus dentalis
the dental pad which replaces the upper incisors in the mouth of ruminants.
pulvinus digitalis
the digital cushion, a pad of fat, white fibrous and elastic tissue located between the distal phalanx and the sole and frog of the hoof of the horse.
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Character State Species 1 2 3 whole plant Habit Trees 1 1 1 Deciduous 1 1 1 Texture Thorny 1 1 1 Trunk shape Butresses 1 1 0 Bottle shape 0 0 1 Trunk colour Green 0 0 1 Gray 1 0 0 Brown 0 1 0 Thorn shape Pointed conical 1 0 0 Corase conical 0 1 1 Thorn color Green 0 0 1 Grayish 1 0 0 Brown 0 1 0 Branching pattern World 1 0 0 Densely crowded 0 1 0 Horizontal 0 0 1 leaves Stipules Present 1 1 1 Deciduous 1 1 1 Pulvinus Present 1 1 1 Pulvinus size Small 0 1 1 Large 1 0 0 Petiole color Green 1 0 1 Red 0 1 0 Length of leaf 4.
EHD needs to be considered in the differential diagnosis of cattle with clinical signs that include fever; stomatitis; lameness; salivation; redness and scaling of the nose and lips; swelling of the tongue; and erosions of the pulvinus dentalis, palatinum, and nose.
Ionic column: a fluted column with a molded base and a capital composed of four volutes, usually parallel to the architrave with a pulvinus connecting a pair on each side of the column, and an entablature typically consisting of an architrave of three fascias, a richly ornamented frieze, and a cornice corbeled out on egg-and-dart and dentil moldings, with the frieze sometimes omitted.