Crotalaria coerulea
Crotalaria carulca|多疣猪屎豆
Crotalaria coerulea
Ten ways of seeing
- measured cast yellow-green
- upright 1.74 : 1
First Look
江馆清秋，晨起看竹，烟光日影露气，皆浮动于疏枝密叶之间。
—— 清·郑板桥《题画竹》
On an autumn morning at the river lodge I looked at the bamboo: mist, sunlight, dew, all drifting among the sparse and dense leaves.
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 where the yellow is deepest: the whole tonal order is measured from that patch. The pose leans left: the upper half carries 11 points further left than the lower — a living thing, not a diagram.
Name and Thing
The binomial is Crotalaria coerulea: the first word is the genus it belongs among, the second the epithet that sets it apart. Here the epithet coerulea means “sky-blue” — the name records the feature the namer noticed first. The Chinese name 多疣猪屎豆 is a modern rendering of the Latin, not an old garden name.
Form and Colour
Measured on this plate: flower colour covers 24.8% of the sheet, foliage 0.0%, the cast yellow-green with a second note of amber. 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. Filed under yellow — a honey-yellow, built in washes from a pale ground. 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 26% 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. There is evidence on the back too: the plate mark pressed into the paper, the slight relief of the pigment, lines worn shallow in a later printing. 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 yellow 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. This plate leans yellow, which in flower language adds one more degree of feeling. In a flora it is a species first and a symbol second; the order is worth keeping.
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
If you keep one line, keep Guo Xi's: from afar its momentum, up close its texture. 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
Crotalaria coerulea is plate 125, 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.
