Key to the Onions by Markings of Bulb Coats. — 
.MAGNIFICATION FORTY DIAMETERS. ; 
A. Ribs not branching into equal divisions and not forming — 
diamond-shaped and very large meshes. 
AB. Meshes unknown. cay 
ABC. _ Obscure epecice-—colliiam, seilloides, Bidwelliz. . 
AB2C. Meshes probably absent on main coat and rectangular 
on its outer lining—fimbriatum, Hendersoni; - Douglasii, 
~ erenulatum, Breweri, falcifolium. a i 
A2B. Main coat without markings. Outer lining with nearly 
rectangular and very faint markings. 
A2BC. Meshes vertically-oblong to nearly square. 
A2BCD. Meshes unknown but probably coming here—crenula- 
tum, ribs many; meshes known—Parishii, ribs few. 
A2BC2D. Meshes not over 2” long by 14” wide. 
A2BC2DE. Ribs many, with a few lateral nerves—pleianthum 3 
var. particolor, meshes 1}-2 by 1-14”; parvum, meshes 1-2" 
by 4”, ribs with a few lateral ‘nerves; Douglasii. ©? °° 
pleianthum, meshes 14-2 by 4-1”, base with the markings of : 
anceps but vertical. 
A2BC2D2E. Ribs few—decipiens, meshes 1-2 by 2”; cristatum 
probably the same; Parryi, meshes 14-2 by 4- 1”, ribs with a 
few lateral nerves; ‘Parishii, probably the same; atrorubens, — 
meshes 2-24 by 2, ribs with a few lateral nerves. 
A2B2C. Meshes transversely oblong to nearly square. 
