266 DIFFERENTIATION AND SPECIFICITY OP STARCHES. 



Lucuma sp. (pcrh.ips Lucuma cainito A. DC.) {Sapotacem.) Dry cotyledons. — Compound grains 

 consisting of 2 to 4, occasionally more, components which are usually equal. Size about 20/i. 

 Separated-grains, with 1 to 3 and 4 pressure facets; size 3 to 12,u; the larger ones have a 

 small cavity with single fissures radiating toward the angles; eccentricity about one-half. 



Lucuma sp. (Sapotacece.) Dry cotyledons. — Compound grains rounded to oblong, occasionally 

 somewhat irregular, 2.5 times as long as broad, consisting of 2 to 12 and more almost equal 

 components. Length about 23,u, thickness about 18/i. Separated-grains with one curved 

 surface and several pressure facets; with one large or small cavity; size 2 to 10/^. Some sim- 

 ple grains are also fovmd. 



Myrislica moschata Thumb. (Myristicacew.) Dry endosperm. — Compound grains rounded to elon- 

 gated-oval, occasionally somewhat compressed, consisting of 2 to 10, rarely more, equal 

 components which are usually arranged regularly. Size about 27fx. Separated-grains, size 

 4 to 15/i; with a small central cavity from which single short fissures occasionally proceed. 



Myrislica salicifolia Willd. (MyristicacecB.) Dry seed. — Compound grains almost round to obloug, 

 consisting of 2 to 10 and 16 usually equal components which are arranged quite regularly. 

 Size about 34;lj. Separated-grains frequently with a small central cavity from which short 

 fissures radiate; size 5 to 18^. 



Poeonia. {Ranuncxdacece.) Fresh unripe endosperm of various species. — Compound grains spherical 

 or oval, consisting of 2 to 4 and 6, rarely 8, components which are usually equal. Size about 

 16|U. Separated-grains size 3 to 12ju. Isolated spherical or oval simple grains are also present. 

 Seeds have sprouted and are either still gi-een or have become red, and are entirely filled with 

 starch. At complete maturity they contain no trace of starch, but a great deal of oil. 



Corydalis lutea DC. {Fumariaceoe.) Fresh placenta of itmnature fruit. — Separated-grains rounded- 

 angular; size about 5/i. Compound grains consisting of 2 to 8 components are also found. 

 Starch quite plentiful. 



Brassica 7iapus Limi. {Brassicacem or Cruciferce.) Fresh endosperm, cotyledons, and seed-coats of 

 immature unripe seeds. — Separated-grains with 1 curved surface and 1 to 4 pressure facets; 

 size 8 to 12m. The few compound grains which have not fallen apart consist of 2 to 4 almost 

 equal components. Simple grains of incomplete formation are also observed. 



Carolinea princeps Linn. (Malvacece.) Dry cotyledons. — Compound grains consisting of 2 to 6 com- 

 ponents which sometimes are equal and regularly or often unequal and irregularly arranged ; 

 1 large and 1 to 4 small components. Separated-grains with 1 curved surface and 1 to 4 

 pressure facets; with a small central cavity and single radial fissures. Size about 15 to 20/i; 

 also simple eccentric-conical grains are also observed. 



Heritiera littoralis Ait. (StercuUacecB.) Dry cotyledons. — Compound grains spherical elongated- 

 lanceolate, frequently somewhat irregular, 3 times as long as broad, consisting of 2 to 12 or 

 more components which are almost equal and usually arranged regularly (rarely in a simple 

 row). Size about 23/i. Separated-grains with a central cavity from which short fissures 

 radiate. Size 4 to lOyu. Some simple spherical grains are also observed. 



Theohroma cacao Linn. (Stercidiacece.) Dry cotyledons. — Separated-grains roimded-angular, fre- 

 quently with 1 curved surface and 1 to 3 pressure facets. Size about 8/i. Compound grains 

 consisting of 2 to 4, rarely more, almost equal components. The cells are filled with oil in 

 which the starch-grains are scattered. 



Thea bohea Linn. (Camelliacece.) Dry cotyledons. — Compound grains consisting of 2 to 4, rarely 8 

 components, which are usually equal and regularly arranged (of which 3 are usually ari'anged 

 lineally, 3 and 4 in one plane). Size about 20 to 25;a. Separated-grains, size 4 to 9 and 12//; 

 instead of a hilum a small cavity is observed from which fissures usually radiate toward the 

 surface of the pressure facets. Simple grains of incomplete formation are also found. 



Triphasia aurantiola Lour.; Limonia trifollata Linn. {Rutacew.) Dry cotyledons. — Grains consist- 

 ing of 2 to 4 and 8 components of different sizes. Separated-grains usually with 1 to 3 pres- 

 sui-e facets and a small cavity ; size 3 to Six. A few simple rounded and rounded-oval grains, 

 size about 9ju, are also present. The seeds are quite conspicuous and seem to bo mature. 

 The cells are filled with starch, and have little or no oil. 



Trichilia micrantha Benth. (Meliacew.) Dry cotyledons. — Compound grains rounded to oblong, 

 frequently irregular, consisting of 2 to 8 and 12 components which are usually equal. Size 

 about 15 to 20/i. Separated-grains, size 3 to ll/z; the larger ones have a small central cavity. 



