TYPE 10. GRAINS COMPOUND, MANY COMPONENTS. 279 



Pappophonim macroslachjum Noes. {Graminacew.) Dry cndoftperm. — Separated-grains size 3 to 8 

 and 10m ; polyhedral or with 1 curved surface and 1 to 5 pressure facets ; usually with a large 

 or a small cavity. Nageli observed only a few compound grains, and also spherical or oval 

 simple grains. 



Poppophorum nigricans R. Br. (Graminacew.) Dry endosperm. — Com])ound grains spherical or 

 oval, consisting of 2 to 10 or more equal components; size about 30 and Siiix. Separated- 

 grains size 5 to 20 and 25m; usually with one curved surface and 1 to 5 pressure facets; rarely 

 entirely polyhedral (only outlined by ]iressin-e facets) ; with a central cavity and radial fissin-es. 

 Simple centric-spherical grains are also jiresent. The compouinl grains of Poppophorum 

 nigricans properly belong to type 14. Thej' are i)laced here because of their relationshij) to 

 the other two species. 



Ptiloneilema plumosun Steud.; Eutriana abyssinica R. Br. (Graminacece.) Dry endosperm. — Sep- 

 arated-grains polyhedral, frequently mth a small cavity and also single delicate radial fis- 

 sures; size 3 to 12m. The majority of the compound grains have fallen apart, the few remain- 

 ing ones are polyhech-al as the result of pressure. 



Echinaria capitata Desf. {Graminacecc.) Dry endosperm. — Compound grains (few intact ones still 

 present), spherical or oval, frequently somewhat angular; size about 34m. Separated-gi-ains 

 polyhedral with sharp borders and angles; size 4 to 18m. 



Ctenium elegans Kunth. {Graminacew.) Dry endosperm. — Separated-grains solid or with a central 

 angular cavity, frequently with 1 curved surface and 1 to 5 pressiu-e facets, many of them 

 entirely polyhedral. The majority of the compound grains have fallen apart, those remain- 

 ing are rounded or oval, consisting of 2 to about 20 components; size about 12m. Simi)le 

 grains few, spherical, or rounded-oval, solid or with a small central cavity; size about IOm- 



Ctenium chapadense Trin. {Graminacew.) Dry endosperm. — Separated-grains, size about 11m; 

 frequently polyhedral (only outUned by pressure facets); many of them have one curved 

 surface and 3 to 5 pressure facets; the larger ones have an angular cavity from which short 

 radial fissui-es proceed. Very few compound grains are present. 



Microchloa setacea R. Br. {Graminacew.) Dry endosperm. — Separated-grains polyhedral, the majority 

 with a large or a small cavity; size 3 to 10m. Only a few free compound grains are present; 

 oval or almost polyhech-al ; size about 20 to 25m. 



Chloris pelrwa Thmnb. ; Eustachys petrwa Desv. {Graminacew.) Dry endosperm. — Separated-grains 

 polyhedral, the larger ones with a central cavity; size 2 to 9m. All the compound grains ha\-e 

 fallen apart. 



Chloris submutica Humb. Bonp.; Eustachys submulica R. and S. {Gramijiacew.) Dry endosperm. — 

 Compound grains spherical or oval, reticulated; size about 24^. Separated-grains rounded- 

 angular to polyhedral; rarely with a small cavity in the larger ones; size 2 to 8m. 



Clenopsis pectinella Taris.; Festuca Nop. Del. {Graminacew.) Dry endosperwt.— Separated-grains 

 rounded or rounded-angular; size 0.8 to 3m, a few compound grains are still foimd, granular; 

 size about 14m. 



Eleusine coracana Gart. (Graminacew.) Dry endosperm. — Separated-grains polyhech-al, only outlined 

 by pressure facets or with one curved surface and several pressm-e facets, with sharj) margins 

 and angles; the larger ones have a small central cavity from which several fissures frequently 

 radiate toward the angles; size 4 to 13m. The greater number of the compound grains have 

 fallen apart; the remaining ones are spherical or oval, about 30m in length, and consist of 2 to 

 50 and lOO equal components, which when few in number (4 to 10) show a regular arrangement. 



Dactyloctenium wgyptiacum Willd. (Graminacew.) Dry endosperm. — Compound grains spherical or 

 oval (not at all angular), granular or reticulated-granular; size about 15 to 21m. Separat(!d- 

 grains rounded-angular to polyhedral; the larger ones with a small cavity; size 1.5 to 5.5m. 



Cynodon dactylon Pers.; C. linearis Willd. (Graminacew.) Dry endosperm. — Separated-grains poly- 

 hedral, usually with a small or large angular cavity; size 2.5 to 8m. A few free compound 

 gi-ains are oljscrved, oval or nearly polyhedral; size about 20m. 



Chondrosium sp. (Graminacew.) Dry endosperm. — SeiJarated-grains rounded-angular to poly- 

 hedral; size 2 to 5m. Only a few compound grains are observed. 



Sparlina cynosuroides Willd. (Graminacew.) Dry endosperm. — Sepai-ated-grains jiolyluulral, several 

 with a small cavity. Only a few intact compound grains still present, consisting of 2 to 12 

 components. 



