IOWA ACADEMY OF SCIENCES. 223 



(2) Seeds not terete. 



Shining, oblong, four lines long. 



B. canadensis. 

 Light brown, oblong, three lines long. 



B. amurensis 

 Light brown, ovate, four to five lines long. 



B. vulgaris. 

 Light brown, obovoid, ten lines long. 



B. nquifolium. 

 Dark brown, oblong, curved, four to five lines long, small. 



B. repens. 

 Brown oblong, curved at base, four lines long, large. 



B. nervosa. 

 h. Seeds reddish, hilum white. 



Diphylleia cymosa. 



EXPLANATION OF PLATES. 



Abbreviations used for diflferent parts of seed: e, epidermal cell; n, nutrient layer; 

 o, osteosclerid layer; v, pigment layer; a, aleurone layer; en, endosperm; ip, inner 

 integument; em, embryo, 



Plate XII Fig. I. Berberis laxiflora B. canadensis; ia, seed; h, hilum. Fig. 2. B, 

 esculenta, (Hort.). Fig. 3. Form of B. cerasina. Fig. 4. B. cerasina. Fig. 5. B. 

 thunbergii; 5a, seed; 5b, seed; h, hilum; r. rapln; c, cotyledons. Fi?. 6 Diphyl- 

 leia cymosa. Fig. 7. B. vulgaris; 7a, seed; 75, seed; r, raphe; m, micropyle; h, 

 hilum, Fie. 8. B. amurensis. Fig. 9. B. aquifolia. Fig. 10. B. repens. Fig. 11. B. 

 nervosa. Fig. 12. Oaulophyllum thalictroides. Fig. 13. Podophyllum peltatum. 

 Fig. 14. B. canadensis. Fig. 15. Jeffersonia binata; a, arel; h, hilum. 



Plate XIII. Fig. I. Berberis nervosa. Fig. II. Form of B. cerasina. Fig. III. Podo- 

 phyllum peltatum. Fig. IV. B. repens. 



Plate XIV. Fig. I. B. canadensis. Fig. II. B. thunbergii. Fig. III. Jeffersonia binata. 



Plate XV. Fig. I. B. vulgaris. Fig. II. Diphylleia cymjsa. Fig. III. B. aquifoUum. 

 Fig. IV. Oaulophyllum. 



Plate XVI. Fig. I. Form ot Berberis vulgaris. Fig. II. B. amurensis. Fig, III. Fruit 

 B. vulgaris; lllb, seed; h, hilum; III c, cross section of seed; c, embryo; en, 

 endosperm. 



