﻿Prof. Bailey on the Crystals found in Plants. 



23 



Leguminos-e, Cassia Chama?crista. 



jEschynomene aspei 



? 



In the bark of the plant, used 

 by the Chinese in making what is called rice paper. 

 Lathyrus sativus. 



Pisum 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.1 The crystals 

 Csesalpina Brasiliensis, Brazil wood. >may be found 



HaematoxylonCampeachianum, 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 Leguminosae which I have examined, that I 

 have no doubt they belong to the whole family. 

 Pinus strobus. In its bark may be found latex vessels 

 crowded with minute crystals, which are right rhom- 

 boidal prisms of 70° and 1 10° ; 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. 



Platanace,e, Platan us occidental is. Crystals abundant in the bark. 



Rhamnaceje, Rhamnus catharticus. 



Rosacea, Sub-Order Pomea. 



Crataegus. Crystals of form A predominate in Ro 



PlNACE-E, 



Pyrus. 

 Cydonia. 



saceae, but bunches (form B) are also 

 mingled with them in the same plant. 



Sub-Order Amygdalce. 

 Prunus. 

 Cerasus. 

 Rosaceje VERiE, Rosa rubiginosa. In the sweet brier the oblique rhom- 

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

 Rosa Carolina. 

 Spiraea salicifolia. 



u 



tomentosa. 



Rubus odoratus. Bunches also. 



