

NEW PLANTS FROM NORTH DAKOTA 1 43 



form and has weak spines of variable length (2-5 mm.). The 

 type is in my herbarium and identical with No. 49, Fasc. V. of 

 Petrak's Cirsiotheca Uni versa, where it has been introduced 

 under the name of Cirsium Flodniannii Petrak. It was collected 

 by J. C. Blumer near Minot, Ward County: "America borealis," 

 North Dakota, in pratis siccis, arenosis prope pagum "Minot," 

 9-12. IX. 1911. 



Erigeron asper var. subinteger var. nov. 



Quaedam folia denticulata. 

 Some leaves denticulate. 



Sparingly on prairies at Kulm, La Moure County, where it 

 was collected by Dr. J. F. Brenckle on May 15, 19 12. 



Grindelia squarrosa var. quasiperennis var. nov. 



Folia denticulata, basin versus angustata. 

 Leaves denticulate, narrowed toward the base. 

 Occasionally found within Benson County, in barren, alka- 

 line soil. 



Amelanchier macrocarpa sp. nov. 



Arbustum 0.5-2 m. altum. Folia recentiora tomento pallido, 

 flavido-albo, mox calvescente dense operta, surculi autem recentes, 

 pedunculi, pedicelli, petioli, nervi mediani foliorum laminae 

 inferioris tardissime detersi. Folia suborbiculari-oblonga, basi 

 rotunda vel subcordata vel raro acutula, apice rotundato vel 

 retuso vel mucronato, recentia in longitudinem plicata, 2-6 cm. 

 longa, 1.5-4.5 cm. lata, vetustiora firmissima, candide et saturate 

 viridia, vehementer venosa, praecipue in marginis partibus duobus 

 e tribus inaequaliter serrato-dentata, dentibus apice callosis, alia 

 autem folia dentibus paucis minimis aliaque marginibus integris 

 vestita. Petala circiter 8 mm. longa, obovata. Pedicelli fructiferi 

 3-10 mm. longi. Pomum succulentum, dulce ,atrum vel atropur- 

 pureum, 10 mm. diametro, ab Idibus Juniis per mensem Julium 

 maturum. Flores de Aprili ulteriore ad Junium priorem apparent. 



Shrubs 0.5-2 m. high. The young leaves densely covered with 

 a pale yellowish-white tomentum, soon becoming glabrate, but 

 the young twigs, peduncles, pedicels, petioles and median nerves 

 of the leaves on the lower side clearing off very late. Leaves 

 suborbicular-oblong, with rounded or subcordate or rarely acutish 

 base, and with rounded or retuse or mucronate apex, folded length- 



