Plate II. 



Fig. 34. Elevated stoma from the stem of Lagenaria vulgaris, g, guard- 

 cells ; e, epidermal cells ; a, res})iratory cavity. Zeiss, 4 x D. 



Fig. 35. Transverse section through an angled portion of an old «tem of 

 Luffa cyUndrica, showing the sliar[) ridge consisting of collenchyma. 

 e, epidermis ; cl, collenchyma ; ct, cortex ; sc, sclerenchyma ; p, 

 peripheral phloem ; p' , axial phloem ; x, xylem ; m , medullary ray. 

 Zeiss, 2xB. 



Fig. 3(J, Transverse section through a keeled portion of an old stem ot 

 Moniordica Charantia, showing the shar[) ridge consisting of a newly 

 formed secondary fibro-vascular bundle, e, epidermis ; cl, collen- 

 chyma ; /, newly formed secondary fibro-vascular bundle ; p, 

 peripheral phloem ; p, axial phloem ; x, xylem of the primary 

 bundle ; sc, sclerenchyma of the primary bundle ; sc', sclerenchyma 

 of the secondary bundle; rn, medullary ray. Zeiss, 1 x B, 



Fig. 37. Rhizome of 3'Ieîothria Japonica gathered in May. At each node 

 three scales are developed, which are destined respectively to be a 

 shoot (.s), a leaf {I), and a tendril {I). Natural size. 



Fig. 38. Starch-grains from the rhizome of Gymnostemma cissoides. Zeiss, 

 4xL). 



