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B. Caps, pyriform pendulous.
a. monoicous or synoicous.
5. nutans.
b. dioicous.
6. annotinum.
7. carneum.
II. L. ovate, not nerved to apex.
a. dioicous.
8. Wahlenbergii.
9. Ludwigii.
b. monoicous.
10. Marattii.
11. calophyllum.
III. L. mostly ovate, nerved to apex.
A. synoicous or monoicous.
12. lacustre.
13. Warneum.
B. dioicous.
14. pseudotriquetrum.
15. neodamense.
16. alpinum.
17. Mühlenbeckii.
18. turbinatum.
19. latifolium.
20. Duvallii.
21. pallens.
22. barbatum.