TYPE 14. GRAINS COMPOUND, OF FEW COMPONENTS OF EQTTAT, SIZE. 205 



Dijckia remiitiflora Otto. {Bromcliacca'.) Dry endosperm. — Coniijound grains splicrica,! to oval, 

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

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

 width al)out lf)/.i. Separated-grains with acute angles and margins, with a cavity at 

 the hilum which is somewhat nearer the pressure facets and from which 1 to 3 fissur(!s 

 radiate towai'd the angles. Size about li/x. Isolated spherical or oval simple grains are 

 also observed. 



Pistia texensis Klotsch. (Aroidea;.) Dry endosperm. — Compound grains s])herical, oval, rarely 

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

 14ju. Separated-grains, size 2 to 6;u; the larger ones with a small central cavity. 



Pisiia straliotes Linn. (Aroidece.) Dry endosperm. — Sei)arated-graiiis occasionally \nt\\ a small 

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

 TIh^ starch-grains of Ijoth 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. 



Aponogetun dislachyum Thumb. (AlismacecB.) Dry endosperm. — Separated-grains with one curved 

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

 grains (only a few intact ones present); size about 18^; 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 22.5m; with eccentric hiliun and occasionally with several fissures radiating 

 toward the distal end. 



Corylus avellana Linn. (Corylacea.) Fresh immature cotyledons. — Compound grains consisting of 

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

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

 angular with rounded angles increase considerably in size about Bfi. Simple almost round or 

 oval grains are also found. Size about 6/i. 



Nectandra rodicEi 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 cavity is observed 

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

 pressure facets), eccentricity about one-third. Size 8 to 22/i. 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 G almost equal components. Separated-grains with a slightly eccen- 

 tric cavity from which several short fissures diverge; size about IB/x. Simple eccentric 

 inverted-conical grains are also present. 



Scabiosa atropurpurea Linn. (Dipsacacew.) Frcsli immature endosperm. — Grains rouniled or rounded- 

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

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

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

 transparent, colorless contents. 



Atropa belladonna Linn. {Solanacece.) Fresh immature seed-coats. — Grains spherical-oval and 

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

 consisting of 2 to 8 components are also jjresent. 



/Egiceras 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 18m; 

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

 facets. Starch very plentiful. 



Lucuma rivicoa Gart. fil. {Sapotacem.) Dry cotyledons. — Compound grains consisting of 2 to 4, 

 rar(!ly 8, equal or un(!(iual components. Size about 28m. Separated-grains with 1 curved 

 surface and 1 to 4 pressure facets. Size 4 to 15m; the larger ones have a small (cavity and 

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

 or shortened-conical grains are also present. Length about 20m; with a cavity toward the 

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

 eccentric-conical type (type 7). 



