810 



STARCHES OF CANNACE^. 



Differentiation of Certain Starches of the Genus Canna. Continued. 



Histological Characteeistics. Continued. 

 Hilum Form, Number, and Posilion. Continued. 



C. edulis: Form small, not very distinct, single, round, 

 occasionally double; no fissures. Position usually 

 very eccentric. 



C. var. (Kunigen Charlotte): Form very small, fairly 

 distinct, round, single, may be multiple, never 

 fissured. Position usually very eccentric, from ex- 

 treme margin to 0.16 to 0.11 of longitudinal axis. 



C. var. {President Carnot): Form small, distinct, round or 

 rarely elliptical, never fissured, usually single, may 

 be multiple. Position usually very eccentric, from 

 extreme margin to 0.16 to 0.11 of longitudinal axis. 



C. var. (L. E. Baity): Form fairly distinct, small, round 

 or rarely lenticular, single or rarely multiple, never 

 fissured. Position usually very eccentric, from 

 extreme margin to 0.16 to 0.11 of longitudinal axis. 



C. var. (Mrs. Kate Grey): Form fairly distinct, small, 

 round or lenticular, single or may be double, 

 occasionally fissured, fissures small and shallow. 

 Position usually very eccentric, from extreme 

 margin to 0.16 to 0.11 of longitudinal axis. 



C. var. {Jea7i Tissot): Form distinct, small, round or 

 rarely lenticular, single or rarely multiple, rarely 

 fissured, fissures small and shallow. Position 

 usually eccentric from extreme margin to 0.16 to 

 0.11 of longitudinal axis. 



C. var. (J. D. Eisele): Form fairly distinct, small, round, 

 single or rarely multiple, rarely fissured, fissures 

 small and shallow. Position usually eccentric, from 

 extreme margin to 0.16 to 0.11 of longitudinal axis. 



Lamella: General Characteristics and Number. 



C. warszewiczii: Very distinct, regular, fairly coarse 

 circles or arcs of circles. About 48 to 50 on larger 

 grains. 



C roscoeana: Very distinct, regular, coarse circles or arcs 

 of circles. More distinct and slightly coarser than 

 those of C. warszeinczii. About 45 on larger grains. 



C. jnuscrfolia: Very distinct, regular, coarse circles or arcs 

 of circles. More distinct and slightly coarser than 

 those of C. xcarszewiczii. About 60 on larger grains. 



C. edulis: Very distinct, regular, coarse circles or arcs 

 of circles. A little fiiner than those of C. loarsze- 

 wiczii. About 85 on larger grains. 



C. var. (Konigen Charlotte): Very distinct, fairly regular, 

 fine circles or arcs of circles, sometimes wavy, 

 not so fine and not so distinct near the distal end. 

 About 65 to 70 on larger grains. 



C. var. {President Carnal): Very distinct, fine, fairly 

 regular circles or arcs of circles, sometimes wavy, 

 not so fine and more distinct at the distal end. 

 About 70 on larger grains. 



C. var. (L. E. Bally): Distinct, fine, fairly regular circles 

 or arcs of circles, sometimes wavy, not so fine but 

 of the same distinctness at distal as at proximal 

 end. About 60 to 70 on larger grains. 



C. var. {Mrs. Kate Grey): Distinct, fine, fairly regular 

 circles or arcs of circles, wavy, not so fiine and more 

 distinct at distal end. About 65 on larger grains. 



C. var. {Jean Tissol): Very di-stinct, fine, fairly regular 

 circles or arcs of circles, occasionally wavy, not so 

 fine bvit of the same distinctness at the distal end. 

 About 60 on larger grains. 



C. var. (J. D. Eisele): Very distinct, fine, fairly regular 

 circles or arcs of circles, sometimes wavy, not so 

 fine and more distinct near the distal end. About 

 55 on larger grains. 



Size. 



C. warszetviczii: From 15 to 70^, commonly 50^. 



C. roscoeana: From 13 to 88m, commonly 60m. 



C. muscpfolia: From 15 to S2m, commonly 55m. 



C. edulis: From 15 to 120m, commonly 60m. 



Histological Characteristics. Continued. 



Size. Continued. 



C. var. {Konigen Charlotte): From 8 to 90m, commonly 45m. 

 C. var. {President Carnot): From 6 to 76m, commonly 50m. 

 C. var. {L. E. Bally): From 6 to 70m, commonly 35m. 

 C. var. {Mrs. Kale Grey): From 7 to 68m, commonly 40m. 

 C. var. {Jean Tissot): From 5 to 60m, commonly 40m. 

 C. var. {J. D. Eisele): From 6 to 78m, commonly 44m. 



Polabiscopic Properties. 

 Figure. 



C. warszewiczii: Very eccentric, very distinct, usually 

 clear-cut, sometimes irregular, lines rather broad, 

 usually only 1 or 2 lines visible for whole length, 

 if 1 line it is longitudinal, and if 2 lines they are 

 oblique. Lines often bent or otherwise distorted, 

 or occa-sionally bisected. 



C. roscoeana: Essentially the same as in C warszewiczii. 



C. muscefolia: Essentially the same as in C. warszewiczii. 



C. edulis: Essentially the same as in C. warszewiczii. 



C. var. {Konigen Charlotte): Essentially the same as in 

 C. warszeinczii. 



C. var. {President Carnot): Essentially the same as in 

 C. warszewiczii. 



C. var. {L. E. Bally): Essentially the same as in C. 

 warszewiczii. 



C. var. {Mrs. Kate Grey): Essentially the same as in 

 C. warszewiczii. 



C. var. {Jean Tissot): Essentially the same as in C. 

 warszewiczii. 



C. var. {J. D. Eisele): Essentially the same as in C. 

 warszewiczii. 



Degree of Polarization. 



C. warszewiczii: Very high. 



C. roscoeana: Very liigh, liigher than in C. warszewiczii. 



C. muscefolia: Very high, slightly higher than in C. 



warszewiczii. 

 C. edulis: Very high, higher than in C. warszewiczii. 

 C. var. {Konigen Charlotte): High, not so high as in C. 



warszewiczii. 

 C. var. {President Carnot): High, not so high as in C. 



warszewiczii. 

 C. var. {L. E. Bally): High, not so high as in C. wars- 

 zewiczii. 

 C. var. {Mrs. Kale Grey): Very high, not quite so high 



as in C. jvarszetoiczii. 

 C. var. {Jean Tissol): High, not so high as in C. ivars- 



zewiczii. 

 C. var. {J. D. Eisele): Very high, the same as in C. 



warszewiczii. 



Polarization with Selenite Quadrants and Colors. 



C. warszewiczii: Quadrants fairly well defined, fairly regu- 

 lar in form, unequal in size. Colors usually pure. 

 C. roscoeana: Quadrants the same as in C. warszewiczii. 



Colors very pure. 

 C. muscefolia: Quadrants the same as in C. u'arszewiczii. 



Colors pure. 

 C. edulis: Quadrants the same as in C. warszewiczii. 



Colors very pure. 

 C. var. {Konigen Charlotte): Quadrants the same as in 



C. warszewiczii. Colors usually pure. 

 C. var. {President Carnot): Quadrants the same as in 



C. warszewiczii. Colors usually pure. 

 C. var. (L. E. Bally): Quadrants the same as in C. 



warszewiczii. Colors usually not pure. 

 C. var. {Mrs. Kale Grey): Quadrants the same as in C. 



warszewiczii. Colors usually not pure. 

 C. var. {Jean Tissot): Quadrants the same as in C. 



warszewiczii. Colors usually not pure. 

 C. var. (J. D. Eisele): Quadrants the same as in C. 



warszetviczii. Colors usually pure. 



