TYPE 8. GRAINS SIMPLE, ECCENTRIC, CUNEIFORM, OR FLATTENED. 221 



Atnijris sylmlica Jacq. (Burscracccv.) Dry cotyledons. — Grains rounded, oval, conical, two-thirds to 

 almost as thick as long; no lamellaj; at the thick end, instead of the hilum, a small cavity 

 with single fissures is observed; eccentricity one-third and one-fourth. Length about 17/i, 

 width Vifi. There arc also present compound grains of 2 to 4 (rarely more) equal or uneciual 

 components, and numerous separat<?d grains (4 to 12) with 1 curved surface and 1 to 3 pres- 

 sure facets; with a small cavity and radial fissures. 



Amyris species. (Burseracew.) Dry cotyledons. — Grains rounded, oval, ellipsoid, shortened-conical, 

 occasionally somewhat angular; half to as broad as long; the larger grains have a small cavity 

 and single radial fissures. The cavity central, if one-half eccentric, then it is at the thicker en(l. 

 Length about 15;u, mdth about 12/^. Among these are compound grains of 2 to 4 or more equal 

 or unequal components with one curved surface and 1 to 3 pressure facets ; a small central cavity 

 and single radial fissures are present. Cells are entirely filled Avith starch; little or no oil. 



Peganum harmala Linn. {Rutaccce.) Dry unripe seeds. — Grains rounded, oval, shortened-conical, 

 frequently more or less irregular; no lamellse; instead of the hilum, sometimes a small cavity, 

 occasionally with short radial fissures, usually near the thick, rarely at the thinner end. 

 Length about 14//. Compound grains of 2 to 5 equal or unequal components. Starch plen- 

 tiful in unripe seeds; ripe ones contain oil, but no starch. 



Memecylon capense Eckl. (Melastomacece.) Dry cotyledons. — Grains conical, oval, frequently unsym- 

 metrical, and oblique or curved; one-half to almost as thick as long; no lamellae; a longitudinal 

 slit with single transverse fissures; or a small cavity with radial fissures; the cavity is at the 

 thick end, and eccentric about one-half to one-fourth. Length about 16 to 20/i, thickness 

 about lofi. There are also present compound grains of few usually equal components. (See 

 tyioe 14.) 



Memecylon amplexicaule Roxb. (Melastomacece.) Dry cotyledons. — Grains as in the preceding, but 

 less conical and more symmetrical. Also similar compound grains. 



Syzygium guineense DC. (Myrlacece.) Dry cotyledons. — Grains oval-spherical to elongated-oblong, 

 occasionally somewhat irregular; two-fifths to almost as thick as long, the broader ones 

 slightly compressed; lamellje numerous, delicate, sometimes not distinct, the innermost ones 

 complete, the outer ones unilateral; instead of the hilum, there is a small cavity from which 

 single fissures radiate, chiefiy in the direction of the long radius; hilum end usually thick- 

 ened, the distal end sometimes narrower and thinner, and sometimes wider, also either taper- 

 ing or of equal thickness. Length about 34 to 42;u, tliiekness about 2.5/^. 



Carophylliis aromalicu.s Linn. {Myrlacece.) Dry cotyledons. — Grains ol>long or elongated-conical; 

 usually two-fifths to three-fifths as broad as long; the broadest ones slightly compressed; 

 lamella? delicate; only the innermost ones complete; a small cavity is usually present instead of 

 a hilum, and frequently a lengthwise slit wWh single ol)liquc fissmcs; thickened at the hilum 

 end, distal end narrowed and at the same time pointed or rounded, or rartiy broadened and 

 compressed into a knife-like edge, and besides often cut off obliquely; eccentricity about 

 one-fifth to one-sixth. Lengtli about 36/^. 



Jambosa vulgaris DC. (Myrlacece.) Dry cotyledons. — Grains usually conical, and circular in trans- 

 verse section; the longer ones about half as thick as long; the shorter ones thicker and some- 

 times rounded-triangular; usually without lamellge, more rarely with few indistinct lamellje, 

 only the innermost ones being complete; instead of a hilum, a cavity is observed with a 

 longitudinal slit, and sometimes with radial fissures; the cavity is at the thicker end, about 

 one-sixth eccentric. Length about 30 to 34/i. 



Amphicarpcea monoica Nutt. (Leguminosce.) Dry cotyledons. — Grains rounded-oval or conical; half 

 to as broad as long; the broader ones sometimes slightly compressed; instead of a hilum, a 

 small cavity with single, delicate, short fissm-es is usually observed; thickened at the hilum end; 

 distal end tapering and conical, rarely broadened and squared. Length about 44/i. Seraicom- 

 pound grains of 2 to 5 part-grains and compound ones of few usually equal components. 



Type 8. Grains Simple, Eccentric, Cuneiform, or Flattened. 



Lamellae coarsest and most numerous on one side, and finest and fewest on the diametrically 

 opposite side. Grains usually broader at the distal end, at the anterior end narrowed and compressed ; 

 either equally thick throughout, or more frequently thicker at the anterior end, and at the distal 



