290 DIFFERENTIATION AND SPECIFICITY OF STARCHES. 



Barchnja obhmijn Wall. (NyDipIuraccn'.) Dry endosperm. — C'oinpoiincl grains rounded or oval, 

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

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

 the larger ones polyhedral and with a central cavity. 



Frankcnia pulvenilentn Andr. (Frankeniacea;.) Dry seeds. — Separated-grains almost rounded, 

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

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



Mesembryanthemum pinnatifidum Linn. fil. {Ficmdecc or Mesembryacece.) Dry endosperm. — Com- 

 pound grains spherical 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^; thickness about 20/i. Separated-grains rounded-angular. Size 



1 to 3m. 



Tetragonia expansa Ait. {Ficoidem or Mesembryacece.) Dry endosperm. — Compound grains oval, 

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

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

 Length about 60yu, thickness about 27/i. Separated-grains rounded-angular to polyhedral. 

 Size 1.5 to 5;u. Also isolated simple spherical grains, size about 12/u, are observed, as well as 

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

 (in doublets about lOfi). 



Aizoon hispanicum Linn. {Ficoidece or Mesembryacece.) Dry endosperm. — Separated-grains rounded 

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

 of polyhedral grains M'hich resemble compound grains may occasionally be seen. Size 

 about 16/u. 



Aizoon caiiariense Linn. {Ficoidece or M esembryacca: .) Dry endosperm. — Separated-grains round or 

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

 pound grains were observed. 



Triavthcma monogijnum Linn. {Ficoidece or Mcsembnjacece.) Dry endosperm. — Compoimd grains, 

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

 central cavity. Size 1 to 5a(. 



Portulaca megalantha Steud. ; Porhdaca grandiflora Hook. {Portulacacece.) Dry endosperm. — Sep- 

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

 grains and broken fragments of larger ones are also present. 



Talimnn patens Willd. {Portulacacew.) Dry endosperm. — Compoimil grains rounded or oval, two- 

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

 Size about 18^. Separated-grains romided-angular to almost polyhedral. Size 1.5 to 4ju. 



Calandrinia conipressn Schrad. {Portulacacece.) Dry endosperm. — Separated-grains rounded or 

 rounded-angular. Size 1 to 3^. No compound grains observed. The menabrane of the 

 endosperm cells is stained blue with iodine. 



Claylonia perfoliata Don. {Portidacacece.) Dry endosperm. — Compound grains oval or lanceolate, 

 frequently narrowed at both ends and spindlc-shajjed, 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 16//. Separated-grains 

 round. Size 1 to 2^. 



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



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

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



Mollugo cerviana Seringe. {Ficoidece or Mesembryacece.) Dry endosperrti. — Separated-grains poly- 

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



2 to 8/u. No compoimd grains could be distinctly observed. 



Pharnaceum verticillaluni Spreng.; Mollugo verticillata Linn. {Ficoidece or Mesembryacece.) 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 20/n. Separated-grains rounded- 

 angular or polyhedral. Size 2 to in. 



