1886. | BOTANICAL GAZETTE. 169 
to Alaska. The seeds are said by Dr. J. S. Newberry to form the principal 
Winter subsistence of the Indians. 
5. N. sagittifolium Pursa.—Flowers small, about an inch 
across when expanded : sepals 5: petals dilated upward, about ¢ 
lines long by 1} wide : stamens 4 or 5 rows; the anthers about 3 
their length: stigmas 11-15 ridges on a disk with crenate mar- 
gins: fruit ovoid, without a neck under the disk, the largest an 
inch in length: leaves olive-green, smooth, oblong, rarely ovate, 
broadly obtuse at the apex, sagittate, the sinus Jy the length of 
the leaf; the floating varying from 8 to 15 inches long by 2 to 3 
broad ; the submerged larger and more numerous: the petals 
sometimes transformed into stamens.—Pursu, 370. 
Confined to the Southern Atlantic States from North Carolina to Florida- 
; ANATION oF PLaTe VI.—The figures are drawn from herbarium 
specimens and are enlarged one-third. 
Sepal of N. advena. 2. Two formsof petals of same, both common, one 
showing the nectary on the back. 3. Stamenofsame. 4. Stigmatic disk of 
* pa 
— 
. 
& . rubrodiscum. 6. Two forms of petals of same, m- 
mon, one showing the nectary. 7. Stamen of same tic disk of 
same. 9. Petal and stamen of the European N, luteum. 10 alo al- 
ti tic disk ofsame. 14,15. Petals 
: lum. 16. Fruit of N. rubrodiscum. 1 
Fruit of N. Kalmianum, one of the berries oblique, as is frequently the case In 
Grasses of Yellowstone National Park. I. 
F. LAMSON SCRIBNER AND FRANK TWEEDY. 
The following grasses were collected by Mr. Tweedy, of the 
U. S. Geological Survey, during the seasons of 1884-85, and he 
has also furnished the notes upon the distribution of the species. 
Sets of the grasses here enumerated were sen Gray, 
to the Academy of Natural Sciences of Philadelphia, and to the 
. 8. Department of Agriculture. 
1, (263, 580.) PanicuM DICHOTOMUM Linn. var. PUBESCENS 
Gray, Man. p. 649. P. pubescens Lam., Michx. Flor. 1.49; Torr. 
Flor. U. S. 144; Steud. Gram. 86. P. thermale Boland. Proc. 
