TYPE 1. GRAINS SIMPLE, CENTRIC, SPHERICAL. 201 



Uniola latifolia Michx. {Graminacece.) Dry seed. Grains rounded, usuallj' more or less polyhedral 

 owing to pressure, slightly if at all compressed, usually hollow. Size about 20ju. 



Chusquea cumingii. Nees. (Graminacece.) Dry seed. Grains rounded, angular with rounded corners 

 to polyhedral; the larger ones with central cavity and some with radial fissures. Size about 

 15/i. No indications of compound grains within the cell. 



Orthodada laxa Beauv. {Graminacece.) Dry seed. Grains angular with rounded corners, or poly- 

 hedral; lamellae, if any, delicate, homogeneous, or very slight. Size about 35 to 40/i. The 

 prcjtoplasmic cells, the outlines of which are often quite indistinct, are filled with two kinds 

 of grains of unequal size, the smaller lying in between the larger. 



Hemarthriu fascicidata Kunth. {Graminacew.) Dry seed. Grains spherical or oval-.spherical, usually 

 polyhedral, or sometimes angular owing to pressure; the larger ones with usually a small 

 central cavity and several radial fissures. Size about 15/i. 



Rotthcella arundinacea Hochst. {Graminacece.) Dry seed. Grains spherical or oval-spherical, some- 

 times angular owing to pressure; the larger ones usually with a small central cavity, and 

 frequently with several radial fissures. Size about lO/i. Some compound grains of few com- 

 ponents (tj'pe 14). 



Manisuris granularis Swartz. (Graminacece.) Dry seed. Grains rounded or angular with rounded 

 corners, frequently spherical or oval-spherical; the larger ones with a central cavity, and 

 usually with a few radial fissures. Size about 12ii. 



Andropogon dissitifloriis Mich.x. {Graminacece.) Dry seed. Grains sjiherical or oval-spherical, and 

 angular with rounded corners; with a central cavity and radial fissures. Size about 15;u. 

 Single separated-grains with one curved surface and one to three pressure facets indicate 

 the former existence of compound grains. 



Andropogon contortus Linn.; Heteropogen contorlus R. and S. (Graminacece.) Dry seed. Grains 

 rounded or angular to polyhedral owing to pressure; with a small central cavity, and some 

 radial fissures. Size about 15 to 21yu. 



Andropogon dircrsiflorus Steud. (Graminacece.) Dry seed. Grains angular, with rounded corners, 

 to polj'hedral; with small central cavity and a few radial fissures. Size about 16 to 21yu. 



Andropogon leucostachyus Humb., Bonp.; Hypogyniumcajnpestre 'Nees. (Graminacece.) Dry seed. 

 Grains spherical, rounded-oval, or angular with rounded corners; with central cavity and 

 radial fissures. Size about 20yu. Among them isolated compound grains consisting of a few 

 components may be found; also separated-grains with one curved and 1 to 3 plane surfaces; 

 cavity with single radial fissures. 



Andropogon iscluemum Linn. (Graminacece.) Dry seed. Grains spherical, or with rounded corners, 

 or polyhedral; with small central cavity and a few radial fissures. Size about 13;u. No 

 compound grains; a few separated-grains, as in Andropogon leucostachyus, appear to be present. 



Andropogon umbrosus Hochst. (Graminacece.) Dry seed. Grains rounded, more or less angular 

 to polyhedral, owing to pressure; with small central cavity and single radiating fissures. 

 Size about 15 to 19^. 



Andropogon laguroidesTiC (Graminacece.) Dry seed. Grains spherical, oval -spherical, and angu- 

 lar with rounded corners; with large or small cavity and ridial fissures. Size about \T^^l. 

 Some separated grains with 1 to 3 pressure facets appear to be present. 



Andropogon argenteus DC. (Graminacece.) Dry seed. Grains spherical, frequently somewhat 

 angular o^sdng to pressure; with rather large cavity. Size about 14ju. Seeds not entirely 

 ripe. 



Andropogon cernus Roxb. ; Sorghum cernus Willd. (GraminacecE.) Dry seed. Grains as in above, 

 solid or with small central cavitj' and single radiating fissure; sometimes split by the fissures 

 into what appear to be separate grains. Size about 13;u. Some grains have a granular surface. 



Andropogon sorghum Brot.; Sorghum vulgare Pers. (Graminacece.) Dry and fresh seed. Grains 

 sjiherical or oval-spherical, sometimes more or less polyhedral owing to pressure; fresh, 

 with distinct central hilum, rarely with radial fissures; dry, usually with central cavity from 

 which fissures radiate. Size aijout 11 to 15/j. According to Payen, the diameter is 30/i. 

 Among these are found compound grains of 2 to 4 or 5 part-grains. 



Andropogon aciculatus Retz.; Chrysopogon aciculatus Trin. (Graminacece.) Dry seed. Grains spher- 

 ical or rounded-oval; with large or small central cavity from which frequently fissures radiate. 

 Size about llju. Among these are found some doublets and triplets. 



