1902] BRIEFER ARTICLES 227 



III. GENETIC CLASSIFICATION OF METASPERMS. 



A. Seeds with parthenogenetic embryos. 



A. Parthenosperm. 

 I. Both embryo and endosperm parthenogenetic. 



I. Euparthenosperm (i) 

 II. One plant, either embryo or endosperm, not parthenogenetic. 



11. Hemiparthenosperm 



a. Endosperm result of fecundation, embryo parthenogenetic 



a, Parthenembryosperm 



1. Effective pollen arising in same flower with seed. 



1. Autembryosperm (a) 



2. Effective pollen arising in neighboring flower on same stock. 



2. Geitonembryosperni (3) 



3. Effective pollen arising in flower of another stock. 



3. Xenembryosperm (4) 



4- Effective pollen arising upon stock of another species or variety, 



4. Bastardembryosperm (5) 

 b. Embryo the result of fecundation, endosperm parthenogenetic. 



b. Parthenendosperm 



1. Effective pollen arising in same flower with seed. 



1. Autendosperm (6) 



2. Effective pollen arising in neighboring flower on same stock. 



2. Geitonendosperm (7) 



3. Effective pollen arising in flower of another stock. 



3. Xenendosperm (8) 



4. Effective pollen arising upon stock of another species. 



B. Seeds with no parthenogetic embryos. 



4. Bastardendosperm (9) 



B. Gamosperm 



a. Embryos arising through autogamy. 



b. Embryos arising through allogamy. 



a. Autosperm (10) 



b, Allosperm 



I. Embryos arising through geitonogamy. 



r. Geitonosperm (11) 



2. Embryos arising through xenogamy. 



c. Embryos hybrid. 



2. Xenosperm (12) 

 c. Bastardosperm (13) 



The figures 1-13 following the names designate fundamental seed 

 types all of which theoretically might arise upon a single plant- Nat- 

 ■'^rally, however, seeds of one or two types will be produced in abun- 

 dance by the individuals of a species, while others will be extremely 



