60. 
23. Perigynia 7-10 mm. long; 
achenes 2-3 mm. long, 1.25- 
2s 2 Sammi BWA Ges Peversidore chelaeheisieiers Vesa cardiae (pe) Oo) 
23. Perigynia 10-20 mm. long; 
achenes 2.5-6 mm. long, 
2-4 mm. wide. Expected (Lupulinae). 
18. Style articulated with the achene, at length 
deciduous. 
24. Achenes strongly constricted at base, 
rounded at apex; lower pistillate scales 
bract-like. Expected (Phyllostachyae). 
24. Achenes not strongly constricted at base, 
short-pointed at apex; lower pistillate 
scales not bract-like. 
25. Lower bracts sheathless or short- 
sheathing. Expected (Shortianae, Atratae, 
Gracillimae). 
25. Lower bracts long-sheathing. 
26. Bracts bladeless or with 
rudimentary blades. Yoq0dad« <suaceuee) Laxttlorae, (ps 66) 
26. Bracts with well-developed blades. 
27. Foliage, especially the sheaths, 
pubescent or puberulent. Expected 
(Gracillimae, Sylvaticae). 
27. Foliage glabrous. 
28. Beak of perigynium bidentate. 
Expected (Extensae). 
28. Beak of perigynium at most 
emarginate. 
29. Pistillate spikes elongate, 
linear to cylindric, on 
slender peduncles, the lower 
usually drooping; perigynia 
not sharply trigonous. 
Expected (Gracillimae, 
Sylvaticae). 
