ON THE SUBSIDIAEY USES OF STIPULES 193 



mentioned those of the Vetch (Vicia sativa), which 

 secrete honey, especially when the sun shines. 



The stipular glands of Viburnum have been already 

 described (ante, p. 40). 



In the Myrtacece, again, we have cases of glandular 

 stipules. In Psidium Cattleyanum they consist of one 

 to four subulate processes, or of one rather membranous 

 and colourless, trifid or tridentate piece. They scarcely 



FIG. 312. TROP^EOLUM CILIATUM, showing leaf and stipule. Nat. size. 



seem to be protective, but the outer process is generally 

 tipped with a globule of fluid. 



The remarkable Peruvian species of Tropoeolum 

 already mentioned (T. ciliaturri) has curious ciliated and 

 apparently gland-tipped orbicular stipules (fig. 312). 



Glandular stipules also occur in some Lythrariece, 

 Leguminosce, Linacece, Onagrariece, Cucurbitacece, Dros- 

 eracecv, Balsams and Cruciferce. 



o 



