276 DIFFERENTIATION AND SPECIFICITY OF STARCHES. 



Urochloa dcprcssa Stcud. (Graminacea.) Dry endosperm. — Compmuid grains isodiiiinctric to oblong, 

 more or loss polyhedral as the result of pressure, reticulateil-granular or granular; size aboiit 

 20ai- Separated-grains round or rounded-angular; size 0.7 to 2.5/li. 



ArundincUa nepnlends Trin. {GraminacecE .) Dry endosperm. — Compound grains spherical, or oval, 

 or low cone-shaped (not angular) ; two-fifths to as thick as long; reticulated-granular or almost 

 homogeneous; consisting of 4 to 1000 or more components; size about 30;u. Separated- 

 grains size 2 to 6/i; the larger ones polyhedral, and have a cavity. 



Dichelaehnc vulgaris Trin. (GraminacecB.) Dry endosperm. — Compound grains rounded, elliptical, 

 oblong, conical; delicately granular; consisting of 1000 or more components; size about IS^u. 

 Separated-grains rounded; size 0.5 to 2/j. 



Urachne parviflora Trin.; Piptatherum muUiflorum Beauv. {Graminacece.) Dry endosperm. — Com- 

 pound grains round or oval, consisting of 6 to 1000 or more equal components; size about 18^. 

 Separated-grains rounded-angular, the larger ones polyhedral, usually with a central cavity; 

 size 2 to ly.. 



Stipa papposa Nees. (Graminacea;.) Dry endosperm. — Separated-grains rounded-angular, the larger 

 ones polyhedral, and have a cavity; size 2 to 6 and l/x. Of compound grains only fragments 

 and a few complete ones remain. 



Stipa gigantea Lagasc. (Graminacew.) Dry endosperm. — Separated-grains rounded-angular, the 

 • larger ones with a small cavity ; size 1 to 4/x. Only a few compound grains are present. Simple 

 centric-lenticular grains are also found. 



Stipa pennata Linn. {Graminacew.) Dry endosperm. — Separated-grains rounded-angular or poly- 

 hedral; size 2 to 4ju. Compound grains are only observed within the cells. 



Lasiagrostis calamagrostis; Stipa calamagrostis Whlbrg. (Graminacea.) Dry endosperm. — Com- 

 poimd grains roimd or oval, frequently slightly angular, as a result of pressure; reticulated- 

 granular; falling apart easily; size about \5n. Separated-grains usually polyhedral, fre- 

 quently have a cavity; size 2 to 9 and ll;u. Grains which are probably simple are found among 

 the above; size 9 to 11 and IS/x; ^^^th central cavity and occasionally single radial fissures. 



Aristida hystrix Liim. (Graminacew.) Dry endosperm. — Separated-grains, size 1.5 to Gyu; the smaller 

 ones rounded, larger ones polyhedral, and have a cavity. Comjiound grains embedded in 

 protoplasm are only observed within the cells of thin sections of the tissue; they are rounded 

 or rounded-angular; size abovit 15 to 20/i. 



Aristida amplissima Trin.; Aristida slipiformis I^am. (Graminacew.) Dry endosperm. — Separated- 

 grains polyhedral, and have a cavity; size 2 to lOyu. A few free compountl grains which in 

 thin sections can be distinctly seen within the protoplasm, which latter takes a yellow color 

 when treated with iodine. Grains spherical, oval, or roimded-angxdar; reticulated; size 

 about 28yu. 



Aristida plumosa Linn. (Graminacew.) Dry cndo.'ipcrm. — SojjaratcMl-graiiis polyheth-al; the larger 

 ones have a cavity; size 2 to S/z. Not many distinct compound grains; round, oval, or ellip- 

 tical; reticulate, or reticulated-granular; size about 26/i. 



Aristida funicidata Trin.; Aristida kotschyi Hochst. (Graminacew.) Dry endosperm. — Separated- 

 grains, size 1 to 5^; smaller ones rounded, larger ones polyhedral, and have a cavity. 

 Compound grains few, round or oval. 



Nardus stricta Linn. (Graminacew.) Dry endosperm. — Compound grains spherical or oval (not an- 

 gular), three-fifths to as thick as long, and consisting of 4 to 300 components; size about 

 18//. Separated-grains rounded-angular, the larger ones polyhech'al, and have a cavity; 

 size 1.5 to 5;u. 



/Egopogon cenchroidcs Willd. (Graminacew.) Dry endosperm. — Separated-grains polj'hedral, the 

 larger ones have a cavity; size 2.5 to 7n. A few compoimd grains are free and some are 

 indistinctly observed within the cells; round or oval and more or less angular as a result of 

 pressure; size about 20yu. 



Mgopogon midtisetus Trin. (Graminacew.) Dry endosperm. — Starch as in the preceding. Size of 

 the separated-grains 2 to 6;u. 



Lycurus phalaroides Humb. Bonpl. (Graminacew.) Dry endosperm.- — Separated-grains polyhedi'al, 

 and have a cavity; size 2 to 10/i. Compound grains are observed indistinctly witliin the 

 cells, and also a few free grains; isodiametric or oval, more or less polyhedral due to pressure; 

 size about 25^. 



