The swan orchid takes its name from the long arched column that curves over the lip like a bird's neck. Its stranger property is that the same plant produces male or female flowers depending on how much light it has had — so wildly different in appearance that botanists described them for years as separate species. Bateman's contributors drew what arrived, faithfully, and left the confusion in the record. The plant was two species until somebody moved it into the sun.

Maker: after Augusta Withers and Sarah Drake, for James Bateman
Date: 1837–1843
Medium of the original: Plate
Original held by: Wikimedia Commons
Credit: Wikimedia Commons
Rights: Public domain, verified
Catalogue number: PA-01031

As chosen: 16 x 24 in, art print, classic frame
Picture	16 x 24 in
Outside size	17.6 x 25.6 in
Depth	0.9 in (22 mm)
Weight	[[REAL PROOF NEEDED: shipped weight per size and frame]]
Hanging	[[REAL PROOF NEEDED: hanging hardware Prodigi fits to this frame]]
Material	Enhanced matte art paper, 200 gsm; acrylic glazing
Made in	Charlotte, North Carolina, by Prodigi

Before a size goes on sale, the file is measured against it: pixels per inch at that size, how much of the picture a crop would lose, tone and sharpness. A size that fails is not offered, so there is nothing to choose wrong.

How the print check works

Sizes offered
Size	dpi	Grade	How it fits
8 x 12 in	450	Excellent	Trimmed 0.2%
12 x 18 in	300	Excellent	Trimmed 0.2%
16 x 24 in	225	Excellent	Trimmed 0.2%
20 x 30 in	180	Good	Trimmed 0.2%
24 x 36 in	150	Good	Trimmed 0.2%

Sizes withheld
Size	Why
8 x 10 in	Wrong shape: a 17% crop
11 x 14 in	Wrong shape: a 15% crop
12 x 16 in	Wrong shape: a 11% crop
16 x 20 in	Wrong shape: a 17% crop
18 x 24 in	Wrong shape: a 11% crop
24 x 30 in	Wrong shape: a 17% crop
30 x 40 in	Wrong shape: a 11% crop
36 x 48 in	Wrong shape: a 11% crop
40 x 60 in	90 dpi; a historical scan is never enlarged