I found another photo in a different magazine,
The Garden, 1920. I guess I was mistaken in thinking this was a Wilson discovery.
Also, Google books supplies a passage from a book called
The Modern Flower Garden, vol. 6 (Lilies) by W. A. Constable (copyright 2013, but is it a reprint?) that references this Farrer No. 316:
centifolium Farrer No. 316 (China) syn,
leucanthum chloraster: an exceptionally fine trumpet lily introduced by the late Mr. Reginald Ferrar under the name of
L. Brownii kansuense. Flowers resemble a large
L. Brownii or
sulphureum with green to purple-brown streaks on the outside. Bulbs should not be planted in permanent positions until they are of flowering size. Keep fairly dry in winter and apply moisture during the summer. Plant 9 in. deep; equal parts loam and leaf-mould with sand and charcoal; perfect drainage; partial shade amongst low-growing shrubs sheltered by taller plants; 6 ft. to 7 ft. Aug.
