Cassia polyphylla
多叶决明
Cassia polyphylla
Ten ways of seeing
- measured cast yellow-green
- upright 1.75 : 1
First Look
论画以形似，见与儿童邻。
—— 宋·苏轼《书鄢陵王主簿所画折枝》
To judge painting by likeness alone is the view of a child.
The sheet is vertical: the eye climbs and settles in the upper half. Let the plant stand before you look for detail. Then step in close: watch where colour meets line, and whether the line ever breaks. Third, find the darkest small patch: the whole tonal order is measured from there.
Name and Thing
The binomial is Cassia polyphylla: the first word is the genus it belongs among, the second the epithet that sets it apart. Two words carry a whole provenance. The Chinese name 多叶决明 is a modern rendering of the Latin, not an old garden name.
Form and Colour
Measured on this plate: flower colour covers 12.0% of the sheet, foliage 0.0%, the cast yellow-green. No other plate shares exactly this measure. A botanical plate: one plant lifted from field or glasshouse and set at the centre of the sheet, root, stem, leaf, flower and fruit in turn, made legible, citable, transmissible.No colour group is recorded. Three things fix the habit: leaf arrangement, tepal count, and how the flower is borne.
Composition
The sheet is tall. No details are appended: a plate for looking, not for keying out. The plant covers only 13% of the sheet, centred near the centre; the emptiness is where the eye rests.
Line and Colour
Eighteenth-century plates are mostly copper engraving: hatched lines for shadow, then hand-colouring by another hand. Take a loupe to three places: petal edge, leaf vein, caption. An unbroken line means engraving; colour crossing the outline means a hand. If you mean to copy it: take its skeleton, its margins and the order of its colours; the burin's hatching is the language of copper — suggest it with pencil density, do not imitate it stroke for stroke.
Poetic Resonance
朝饮木兰之坠露兮，夕餐秋菊之落英。
—— 战国·屈原《离骚》
At dawn I drink the dew fallen from magnolia; at dusk I dine on the fallen petals of autumn chrysanthemum.
The poem gives the mood first and the picture supplies the form; set the line beside the plate and the corolla becomes its resting point.
Symbolism
The symbolism of such a plate lies not in flower lore but in record: the belief that a plant deserves to be drawn accurately — the plainest ethic of the scientific age. Flower language was added later; the flower knows nothing of it, and that innocence is part of its power.
Season and Place
Plates usually record flowering, the fortnight when a plant is most identifiable. Various: local hillside or a plant brought from overseas. The nineteenth-century botanic garden and glasshouse were their first address away from home. The year 1781 on the plate is that of publication, not of flowering — the gathering came a year or two earlier. Read the locality and the flowering season both with a discount: one is hearsay, the other a ten-day peak.
The Book and the Hand
“Icones Plantarum Rariorum” carries only Nikolaus Joseph Freiherr von Jacquin's name. The image is public domain; the hand-colouring is still one person's hand.
What to Take Away
Appreciation is not knowledge but habit — one more look each time. A flora exists to be consulted; look long enough and you forget to consult — someone in 1781 gave a whole day to a single flower.
About this plate
Cassia polyphylla is plate 89, from Icones Plantarum Rariorum, drawn by Nikolaus Joseph Freiherr von Jacquin. This public-domain plate is reproduced at high resolution, free to view and download. Publication: Vindobonae, C.F. Wappler, 1781-1793.
