Prof. Bailey on the Crystals found in Plants. 23 



Legtjminos^, Cassia Chamsecrista. 



^schynomene aspera ? In the bark of the plant, used 

 by the Chinese in making what is called rice paper. 

 Lathyrus sativus. 

 Pisura maritimum. In the ashes of the leaf; the veins 



are beautifully marked out by the crystals. 

 Pisum sativum. 

 Viccia cracca. 

 Phaseolus. 



Lespedeza frutescens. 

 Trifolium pratense. 



Pterocarpus santalinus, red sandal wood."! The crystals 

 Csesalpina Brasiliensis, Brazil wood. f may be found 

 HsematoxylonCampeachianum, logwood J in abundance 



in the ground dye-stuffs of commerce. 

 Gleditschia triacanthus. 



Robinia pseudacacia. In vast numbers in the liber. 

 And many others. 

 Crystals of form A occur in such profusion in all spe- 

 cies of Leguminosse which I have examined, that I 

 have no doubt they belong to the whole family. 

 PiNACE^, Pinus strobus. In its bark may be found latex vessels 



crowded with minute crystals, which are right rhom- 

 boidal prisms of 70° and 110°; these are perhaps 

 secondary to form A. (See fig. 12.) In Torreya 

 taxifolia the bark contains long vessels covered with 

 minute rhombic crystals. (Fig. 14.) The wood of 

 the Pine tribe is remarkably free from crystals. 

 PlatanacejE, Platanus occidentals. Crystals abundant in the bark. 

 Rhamnaceje, Rhamnus catharticus. 

 Rosacea, Sub-Order Pomece. 



Crataegus. Crystals of form A predominate in Ro- 



Pyrus. sacese, but bunches (form B) are also 



Cydonia. mingled with them in the same plant. 



Sub-Order AmygdalcB. 

 Prunus. 

 Cerasus. 

 RosACEiE VER^, Rosa rubiginosa. In the sweet brier the oblique rhom- 

 bic prism unmodified is not unfrequent- (See fig. 4.) 

 Rosa Carolina. 

 Spirsea salicifolia. 

 " tomentosa. 

 Rubus odoratus. Bunches also. 



