NOTES AND OBSERVATIONS. 157 
EXPLANATION OF PLATES. 
The figures were drawn by Miss Grace E. Johnson from 
specimens in the herbarium of the Missouri Botanical 
Garden, or, in case of the details, from the author’s 
sketches. 
Plate 46. Kalistroemia parviflora.— Branch, one-half size; fruit, from 
above, < 24; carpel and style, from side, 5. 
Plate 47. Megapterium Oklahomense.— 1, Plant, one-half size; 2, fruit, 
natural size; 3, seed, X 8. Megapterium Fremontii.— 4, Seed, x 8. Megap- 
terium Missouriense.— 5, Seed of common form, X 8; 6, seed of Texan 
form, 8. 
Plate 48. Lilaeopsis Carolinensis.— 1, Portion of Joor plant, natural 
size; 2, portion of Langlois plant, natural size; 3, fruit, 8; 4, flower- 
ing umbel, 5. 
Plate 49. Euphorbia corollata Joorii.— Plant, natural size; seed, X 8; 
involucre and capsule, 5. 
Plate 50. Sagittaria arifolia aquatilis.— Plant, one-half size; stamens 
and immature achenes, < 8. 
