290 DIFFERENTIATION AND SPECIFICITY OF STARCHES. 



Barchnja nblongn Wall. {Ny7nphceaceoc.) Dry endosperm. Compound grains rounded or oval, 

 usually polyhedral as a result of pressure, reticulate, consisting of 20 to over 800 compo- 

 nents. Size about 26ju. Separated-grains 2 to 8/i in size; the smaller ones rounded-angular, 

 the larger ones polyhedral and with a central cavity. 



Frmikenia jmlvendenta Andr. {Frankeniacece.) Dry seeds. Separated-grains almost rounded, 

 frequently clinging to each other like flakes of snow. Size 0.7 to 2/i. No compound grains 

 could be positively distinguished. The starch is probably found in the endosperm. 



Mesembryanthemum pinnatifidmn Linn. fil. {Ficoidece or Mcsembryacew.) Dry endosperm. Com- 

 pom^d grains sjjherical to oblong, one-third to as thick as long, frequently angular or even 

 polyhedral, as result of pressure, granular or homogeneous, containing over 5000 compo- 

 nents. Length about 36;u; thickness about 20/x. Separated-gi'ains rounded-angular. Size 



1 to 3m. 



Tetragonia expansa Ait. (Ficoidece or Mesemhryacece.) Dry endosperm. Compound grains oval, 

 elliptical, or conical, one-fourth to three-fom-ths as thick as long; polyhedral as result of 

 pressure, reticulated-granular or almost homogeneous, consisting of over 4000 components. 

 Length about 60m, thickness about 27^. Separated-grains rounded-angular to polyhedral. 

 Size 1.5 to 5fi. Also isolated simple spherical grains, size about 12^, are observed, as well as 

 compound grains of few components, which increase in size as the grains are less compound 

 (in doublets about lO/i). 



Aizoon hispanicum Linn. (Ficoidece or Mesemhryacece) Dry endosper^n. Separated-grains rounded 

 to polyhedral. Size 1 to 3 and 4^. Completely filling the endosperm cells, in which groups 

 of polyhedral grains which resemble compound grains may occasionally be seen. Size 

 about 16^. 



Aizoon canaricnsc Linn. (Ficoidece or Mesemhryacece.) Dry endosperm. Separated-grains round or 

 rounded-angular. Size 0.5 to hardly 2^. Completely filling the endosperm cells. No com- 

 pound grains were observed. 



Trianthema vumogynum Linn. (Ficoidece or Mesemhryacece.) Dry endosperm. Compound grains, 

 rounded. Size 10 to 12^. Separated-grains rounded to polyhedral, the larger ones have a 

 central cavity. Size 1 to 5ai. 



Portulaca megalantha Steud.; Portvlaca grandiflora Hook. (Portulacacece.) Dry endosperm. Sep- 

 arated-grains rounded-angular to acute-polyhedral. Size 1.5 to 6/^. A few small compound 

 grains and broken fragments of larger ones are also present. 



Talimmi patens Willd. (Porhdacacea'.) Dry endosperm. Compound grains roimded or oval, two- 

 thirds to as thick as long, reticulated-granular, consisting of 4 to over 600 components. 

 Size about ISju. Separated-grains rounded-angular to almost jiolj'hedral. Size 1.5 to 4/i. 



Calandrim'a co7nprc.'<sa, Schrad. (Portulacacece.) Dry endosperm. Separated-grains rounded or 

 rounded-angular. Size 1 to 3m. No compound grains observed. The membrane of the 

 endosperm cells is stained blue with iodine. 



Claytonia perfoliata Don. (Portulacacecv.) Dry endosperm. Compound grains oval or lanceolate, 

 frequently narrowed at both ends and spindle-shaped, one-fifth to two-thirds as thick as 

 long, somewhat polyhedral by means of pressure, granular or homogeneous, consisting of 

 100 to over 6000 components. Length about 46m, thickness about 16m. Separated-grains 

 round. Size 1 to 2m. 



Monocosmia corrigioloides Fenzl. (Portulacacece.) Dry endosperm. Compound grains round to 

 lanceolate, one-fourth to as thick as long, often angular by means of pressure and even poly- 

 hedral, granular or almost homogeneous, consisting of over 8000 components. Length 

 about 45m, thickness about 20m. Separated-grains round or rounded-angular. Size 1 to 3m. 



Montia minor Gmel. (Portulacacece.) Dry endosperm. Separated-grains rounded or rounded- 

 angular. Size 0.7 to almost 3fi. No compound grains are present. 



Mollugo cerviana Seringe. (Ficoidece or Mesemhryacea'.) Dry endosperm. Separated-grains poly- 

 hedral, the larger ones compressed to about half their width, with a central cavity. Size 



2 to 8m. No compoimd grains could be distinctly observed. 



Pharnaceum verlicillatum Spreng.; Mollugo verticillala Linn. (Ficoidece or Mesemhryacece.) Dry endo- 

 sperm. Compound grains rounded or oval, three-fifths to just as thick as long, reticulated- 

 granular, consisting of 4 to over 800 components. Size about 20m. Separated-grains rounded- 

 angular or polyhedral. Size 2 to 4m. 



