682 WorsdelL — A Study of the Vascular System in Ranales. 
Fig. 20. Paeonia , sp. (herbaceous type) ; base of petiole. 
Figs. 2i, 22. Paeonia , sp. (herbaceous type) ; successive stages in union of leaf-base with stem. 
Fig. 23. Paeonia, sp. (herbaceous type) ; peduncle. 
Fig. 24. Calycanthns floridus , L. ; typical region of petiole. 
Fig. 25. Caiycanthus floridus, L. ; stem. 
Fig. 26. Caiycanthus floridus , L. ; peduncle. 
Fig. 27. Manglietia ins ignis, Blume (Magnoliaceae) ; typical region of petiole. 
Figs. 28, 29, 30. Manglietia insignis , Blume; successive stages in union of petiolar vascular 
system with that of stem. 
Fig. 31. Illicium Cambodianum, Hance ; typical region of petiole. 
Fig. 32. Illicium Cambodianum, Fiance; union of leaf- base with stem. 
Fig. 33. Liriodendron tulipifera , L. ; peduncle. 
Figs. 34-37. Polyalthia suberosa, Benth. and Hook; successive stages from typical part of 
petiole (Fig. 34, monostele or cylinder) downwards through the intermediate ‘ polystelic ’ condition 
(Fig. 35, see Paeonia ) to the simple arc (Fig. 36), and the union of the latter with the stem- 
cylinder (Fig. 37). 
Fig. 38. Uvaria zeylanica, L. ; typical region of petiole. 
Fig. 39. Uvaria Narum, A. D. C. ; peduncle. 
Fig. 40. Cananga odorata, Hook. f. ; petiole. 
Fig. 41. Podophyllum peltatum, L. ; flowering stem. 
Fig. 42. Epimedium pinnatum, Fisch. ; typical region of petiole. 
Fig. 43. Nandina domestica, Thunb. ; segment of petiole. 
Fig. 44. Nandina domestica, Thunb. ; segment of stem. 
Fig. 45. Berberidopsis corallina, Hook f. ; typical region of petiole. 
Fig. 46. Berberidopsis corallina , Hook f. ; lower region of petiole. 
Fig. 47. Berberidopsis corallina , Hook f. ; union of leaf-bundles with stem-cylinder. 
Fig. 48. Hydrastis canadensis , L. ; flowering stem. 
Figs. 49-52. Berberis A quifolium, Pursh. ; successive stages in passage from typical part of 
petiole (Fig. 49) to union of leaf-base with stem (Fig. 52). 
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