TYPE 14. GRAINS COMPOUND, OF FEW COMPONENTS OF EQUAL SIZE. 265 



Dyckin remoliflora Otto. (Bromeliacece.) Dry endosperm. Compound grains spherical to oval, 

 usually of almost regular shape, about twice as long as broad, consisting of 2 to 10 and 

 12 nearly equal components which are often regularly arranged. Length about 24;u, 

 width about Ifl/u. Separatinl-grains with acute angles and margins, with a cavity at 

 the hihun which is somewhat nearer the pressure facets and from which 1 to 3 fissures 

 radiate toward the angles. Size about 14^. Isolated spherical or oval simple grains are 

 also observed. 



Pistia (c.vensis Klotsch. (Aroidece.) Dry endosperm. Compound grains spherical, oval, rarely 

 shortened-conical ; consisting of 2 to 12 and 20 almost equal components. Size aljout 11 to 

 14ju. Se])arated-grains, size 2 to Gyu; the larger ones with a small central cavity. 



Pistia stratiotes Linn. (Aroidew.) Dry endosperm. Separated-grains occasionally with a small 

 central cavity; size 2 to 8/u. Compound grains few, consisting of 2 to 8 components. 

 The starch-grains of both species of Pistia form a wall-like layer in the endosperm cells. 

 The lumen is filled with a substance which takes a golden yellow stain when treated 

 with iodine. 



Aponogeton distachyum Thumb. (Alismaceoe.) Dry endosperm. Separated-grains with one curved 

 surface and 1 to 3 pressure facets; usually with a small cavity. Size 2.5 to llyu. Compound 

 grains (only a few intact ones present); size about ISyu; consisting of 2 to 5, rarely 10, compo- 

 nents. According to Payen (Ann. Sc. Nat., 1838, ii, 25, pi. 6, fig. 23), the size of the sep- 

 arated-grains is 22.5^; with eccentric hilum and occasionally with several fissures radiating 

 toward the distal end. 



Corylus avellana Linn. {Corylacece.) Fresh immature cotyledons. Compound grains consisting of 

 2 to 8 almost equal components, which are irregularly arranged; small and falling apart 

 easily. After the compound grains have fallen to pieces the separated-grains which are 

 angular with rounded angles increase considerably in size about 5/i. Simple almost round or 

 oval grains are also found. Size about 6ju. 



Nectandra rodioei Schomburgh; Fructus bebeeru. (Thymelacece.) Dry cotyledons. Compound grains 

 of 2 to 4, rarely more, almost equal components which are arranged regularly. Separated- 

 grains isodiametric to twice as long as broad; instead of the hilum a small cavitj' is observed 

 from which 2 short fissures occasionally radiate toward the jjroximal end (the ones with 

 pressure facets), eccentricity about one-third. Size 8 to 22yLi. A few rounded or shortened- 

 conical simple grains are also present; the hilum is toward the thicker end. Therefore they 

 belong to the eccentric-conical type (type 7). 



Laurus nobilis Linn. (Lauracece.) Dry cotyledons. Compound grains almost round to elongated- 

 oval, consisting of 2 to 6 almost equal components. Separated-grains with a slightly eccen- 

 tric cavity from which several short fissures diverge; size about 15,u. Simple eccentric 

 inverted-conical grains are also present. 



Scabiosa atropurpurea Linn. (Dipsacacece.) Fresh immature endosperm. Grains rounded or rounded- 

 angular; size about 4/i. The greater number of these are probably separated-grains; the 

 smaller number are simple. Some larger compound grains consisting of 2 to 8 almost equal 

 components are also observed. The starch forms a lining to the wall of the cells, which have 

 transparent, colorless contents. 



Atropa belladonna Linn. (Solanacew.) Fresh immature seed-coats. Grains spherical-oval and 

 rounded-angular; size about 6 to 8^. Many of them are separated-grains. Compound grains 

 consisting of 2 to 8 components are also present. 



jEgiceras majus Gart. {Myosinacece.) Dry cotyledons. Compound grains consisting of 2 to 4, rarely 

 8, usually equal components which are arranged regularly. Separated-grains, size 4 to 18/^; 

 with a small cavity from which fissures radiate toward the circumference of the pressure 

 facets. Starch very plentiful. 



Lucuma rivicoa Gart. fil. (Sapotacece.) Dry cotyledons. Compound grains consisting of 2 to 4, 

 rarely 8, equal or unequal components. Size about 28;u. Separated-grains with 1 curved 

 surface and 1 to 4 pressure facets. Siz(! 4 to 15ix; the larger ones have a small cavity and 

 single radial fissures; eccentricity about one-half, rarely one-third. Isolated simjjle, rounded 

 or shortened-conical grains are also present. Length about 20/x; wth a cavity toward the 

 thicker end, from which 2 fissures radiate toward the narrowed end. Starch belongs to the 

 eccentric-conical type (type 7). 



