257 
Glands of the Plumbagineae. 
Fig. 18. Leaf of Statice axillaris , nat. size. 
Fig. 19. Leaf of Statice cylindrifolia, nat. size. 
Fig. 20. A group of mucilage-glands in the axil of the leaf of S. macrorrhabdos. 
b, basal cells ; c, cap cells ; m, mucilage. 
Fig. 21. Vertical section of a mucilage-gland of S. rosea , *35 mm. in diameter. 
Fig. 22. Stalked mucilage-gland (axillary) found in Statice sareptana. 
Fig. 23. Branch of Armeria vulgaris from an estuarine mud-flat. Nat. size, cr, 
surface-level of the soil. 
Fig. 24. Tap-root and crown of a seedling of Armeria chilensis. Nat. size. 
Fig. 25. A mucilage-gland of the same, swollen by imbibition of water in 
preparation. 
Fig. 26. Upper portion of the epidermis of the inner side of the bract-sheath of 
A. vulgaris bearing mucilage (c), intermediate ii g), and Mettenian glands (g). 
s, stoma. is -4 mm. in diameter. 
Fig. 27. A mucilage-gland (axillary) of Aegialitis annulata , -5 mm. in diameter. 
PLATE XII. 
Fig. 28. Mucilage-glands in the axil of a leaf of Vogelia indica var. socotrana , 
.62 mm. in diameter. 
Fig. 29. Upper portion of a sepal of Vogelia pendula. gl, glands on the inner 
face. Enlarged. 
Fig. 30. A calycine gland of V. pendula , -17 mm. in diameter. 
Fig. 31. A mucilage-gland of Acantholimon cabulicum , *17 mm. in diameter. 
Fig. 32. A mucilage-gland in the axil of a young leaf of Plumbago zeylanica, 
.28 mm. in length, b, basal cells, c, secreting cells. 
Fig- 33. Intermediate gland in the axil of the leaf of Plumbago europaea , 
.2 mm. in length, ac, Nebenzellen. 
Fig. 34. Portion of the margin of the leaf of Plumbago micrantha , bearing 
multicellular glands. 
Fig. 35. A marginal gland of the same, fully developed. 
Fig. 36. Upper part of the calyx of Plumbago rosea bearing stalked glands. 
Enlarged. 
Fig. 37. Conical intrusion of the stalk of the calycine gland of Plumbago 
scandens. 
Figs. 38, 39. Optical sections of the head and the stalk of a nearly sessile' 
external calycine gland of Plumbago rosea. 
Figs. 40, 41. Head (-13 mm. in diameter) and stalk of internal calycine gland 
of Plumbago zeylanica. 
Fig. 42. Trough formed by the fused bases of the cotyledons of Armeria 
vulgaris, mg, mucilage-gland. 
Fig. 43. A mucilage-gland from the cotyledonary trough of Armeria vulgaris. 
Figs. 44, 45. Basal cells of young mucilage-glands in the same position. 
Fig. 46. A developing mucilage-gland, -i mm. in diameter, in the same 
position, showing nuclei ( n ) and nucleoli. 
Fig. 47. Seedling Armeria vulgaris , not yet above ground, nat. size. 
S 
