69 



CHESTNUT. 



1. Size. Grains occur in two sizes, the larger being 15 — 



30)u long; the smaller, 1 — S/j. long. 



a. No intermediate sizes found usually, 



2. Form. Very irregular, pear-shaped, ellipsoidal, kidney- 



shaped, club-shaped, often pointed, 

 a. Aggregates of 2 — 3 grains occasionally 

 present. 



3. Laminae. Indistinct or lacking. 



4. Hilimi. Round or elongated, often cleft. 



5. Polarization Crosses. Distinct. 



6. Selenite Plate. Dull play of colors evident. 



J CLOVE FRUIT. 



1. Size. Grains usually from 10 — 40^1 in diameter. 



2. Form. Pear-shaped or segmented forms often occur. 



a. No aggi-egates. 



3. Laminae. Distinct and delicate. 



4. Hilum. Distinct, small. 



a. Always in broad end. 



b. Sometimes cleft. 



