VASCULAR PLANTS OF NORTH DAKOTA 409 
dates of migration can be given only in special articles on the 
subject, and without such methodical study no satisfactory results 
can be obtained. I have in many published articles in the 
AMERICAN MiIpLAND NATURALIST attempted a complete state- 
ment of the migratory habits of the birds of Notre Dame, Indiana. 
To these articles, then, I refer my auditors for an exact account of 
present conditions of migration. 
Thus the story of-our birds ends. To have done ful justice 
to the subject would require a volume. I have aimed at giving 
only a summary of my observations—and this mostly in what 
related to the distribution and migration of our birds. The more 
interesting, but not more important, part of a bird’s life—its 
habits—I have barely touched upon, chiefly because hitherto my 
study of birds’ habits has been incidental, and can not be thor- 
oughly done without neglecting the other departments. I hope 
to take up this part of ornithology when I shall have finished my 
study of the migration and distribution of our birds. 
ENUMERANTUR PLANTAE DAKOTAE SEPTEN- 
TRIONALIS VASCULARES.— VI. 
ENUMERAVIT J. LUNELL. 
The Vascular Plants of North Dakota.—VI. 
With Notes by J. Lunell. 
504. Biauricula intermedia (Guersent) Lunell. 
Iberits intermedia Guersent. Bul. Soc. Philom. III, 169, t. 21, 
(1811). 
Occasionally escaped. Leeds. 
i PPV spicscorides. Ui. 666. Pints, XOX? “072 Tour. 
Els. 184. (1694). ‘Anguillara, Matthioli, etc. Linn. Syst. (1735), 
Gen. (1737 and 1754). 
505. Lepidium densiflorum Schrader, Ind. Sem. Gott. 4. 
(1835). 
Lepidium intermedium A. Gray, Man. Ed. 2. (1856). 
Leeds, Sheyenne. 
506. Lepidium ramosissimum A. Nels. in Bull. Torr. Bot. 
Club. 26: 124. (1899.) 
Leeds. 
