250 DIFFERENTIATION AND SPECIFICITY OF STARCHES. 



Cucumis salivis Linn. {Cucurhitacece.) Fresh unripe cotyledons. Grains rounded, rarely angular. 

 Size about 5 to G/i. Starch rather plentiful. 



Vatica robusta Steud.; Shorea robusta Roxb. (Dipterocarpacea:.) Dry cotyledons. Grains oval, 

 elliptical, shortened-conical, rarely rounded-oval to oblong; occasionally somewhat angular, 

 two-fifths to two-thirds as broad as long; the larger ones frequently have a cavity or a slit. 

 Length about 11/^, thickness about Sfi. These grains may belong to the eccentric-conical 

 type (tjTe 7). 



Thea bohea Linn. (Camelliacew.) Dry cotyledons. Grains spherical or roundetl-oval, rarely oval; 

 instead of a hilum there is a small central cavity with radial fissures; the cavity is usually 

 central, rarely one-half to two-thirds eccentric. Size about 16 to 19yu. The starch probably 

 belongs to the eccentric-conical tyj^e. Some compound grains of few unequal components 

 are also observed as in type 14. 



Calophyllum lanceolatum Blume. (GuttifercB.) Dry cotyledons. Grains spherical or slightlj' angular; 

 majority with a small central cavity. Size about 10 to 12/i. Some compound grains of 

 2 to 3 equal components are also observed. 



Calophyllum tacainahaca Willd. {Guttiferce.) Dry cotyledons. Grains mostly rounded. Size about 

 6^. Isolated larger, oval ones. Size about 13/u or more. Starch appears to be in the process 

 of solution; oil very plentiful. 



Acer laurinum Hook. (Lapindacece.) Dry cotyledons. Grains rounded or oval. Size 8 to lOyu. Many 

 are distinctly separated-grains with one curve and 1 to 3 pressure facets, others appear to 

 be simple. Many of them are probably in the process of solution, so that the stai-ch may 

 disappear at maturity of the seed; oil plentiful. 



Acer pseudoplanatus Liim. (Lapindacece.) Fresh, unripe, still very green cotyledons. Grains rounded, 

 rarely oval, usually more or less angular. Size about 5 to 7ju. Starch rather plentiful. 



Banisteria sp. {Malpighiacece.) Dry cotyledons. Grains rounded to almost polyhedral. Size about 

 5jx. The starch-grains lie singly or very few in the cells, which are filled with plastids of 

 rounded, angular shape. 



Aleurites moluccana Willd. (Euphorbiacece.) Dry seeds. Grains spherical, sUghtly angular, or poly- 

 hedral; a small central cavity is found in the larger ones. Size about l/x. 



Aleurites sp. {Eiiphorbiacew.) Dry cotyledons. Grains spherical to oval, sometimes slightly irregular 

 or angular. Size about 11/j. Starch not very plentiful, and embedded between plastids. 

 The albumen adhering to the seed coats was not examined. 



Ochna lucida Lam. (Ochnacem.) Dry cotyledons. Grains rounded, oval, elliptical, many somewhat 

 angular; half to as thick as long; the larger ones have a small cavity. Length about 5 to 6yu, 

 thickness about ifi. The seeds are probably not fully developed. Protoplasm and rounded 

 or angular plastids were found along with the starch. Fatty oil seems to be wanting. 



Ochna squarrosa Linn. {Ochnacece.) Dry cotyledons. Grains rounded, oval, frequently angular; 

 the bi'oad ones slightly compressed; the larger ones have a small central cavity. Size about 

 7m. Some oil is present. 



Ammannia latifuUa Linn. (Lythracece.) Dry seeds. Grains spherical, or almost so, with small cen- 

 tral cavity from which single fissures occasionally radiate. Size about 10^. Some doublets 

 are also observed. Besides the oil the seeds contain varying amounts of starch, or some- 

 times none. 



Ammannia vesicatoria Roxb.; Ammannia baccifera Linn. (Lythracem.) Dry seeds. Grains rounded 

 or oval, occasionally somewhat angular or irregular; the broad ones slightly or not at 

 all compressed; with a small, almost central, cavity, and some single radial fissures. Size 

 about 10 to 13/i. Some doublets and triplets are found among the simple grains. The 

 seeds of both species contain much oil. Starch, which occurs in varying quantities, is 

 proljably found in special cells. On pressing the seeds the oil comes out first, and later 

 the starch. 



Galega biloba Sweet. {Leguminosw.) Dry cotyledons. Grains rounded or oval, sometimes irregular. 

 Size about 4 to 5^. Starch is not very plentiful, in addition much protoplasm and little 

 oil is present. 



Arachis hypogcea Linn. {Leguminosw.) Dry cotyledons. Grains spherical, with a small central 

 cavitj'. Size about 12//. Much oil is also found. 



