VASCULAR PLANTS OF NORTH DAKOTA 



237 



1277. Eupatorium gryposepalum (Wallr.) Lunell. Agrimonia 

 gryposepala Wallr. Beitr. Bot. 1 49. (1840). A. hirsuta Bickn. 

 Bull. Torr. Bot. Club 23:509. (1896). Turtle Mountains. 



583. Rubus pubescens Raf. in Med. Repos. N. Y. Sec. III:n. 

 333. (1811). 



1278. Rosa alcea Greene, Leaflets 11:63. (1910). Devils 

 Lake. 



1279. RosaEngelmanniS. Wats. Gard. & For. 2:376. (1889). 

 N. D. ace. to Rydb. Fl. R. M. 19 17. 



1280. Rosa Woodsii Lindl. Mon. Ros. 21. (1820). N. D. ace. 

 to Rydb. Fl. R. M. 1917. 



Insert next before 598, Amelanchier macrocarpa: 



1 28 1. Amelanchier leptodendron Lunell, sp. nov. 



Analytical Key. 



Leaves ovate or obovate, at least in the young leaves acute 

 at both ends; racemes and petals small; a tree A. leptodendron 



Leaves oblong with rounded apex and rounded or subcordate 

 base; racemes and petals large; a shrub.... A. macrocarpa 



Arbor teres, 3-5 m. alta, cortice piano cinereo, ramulis canis vel rubro- 

 fuscis. Folia matura perviridia, utrimque glabra, firma, ovata — obovata, 

 circumferentia basin versus plerumque angustata, magis minusve acuta vel 

 cuneiformis, apice acuto, margine dimidio superiore irregulari-dentato. 

 Florum racemi 2-3 cm. longi, pedicelli 0.5 — icm. longi, sepala triangulari- 

 lanceolata vel latiora, petala spathulata, 5-6 mm. longa. Racemi pomiferi 

 5cm. longi. Pomumparvum, 5mm. diametro. Gemmae hiemales pubescentes. 



A slender tree (scarcely appearing as a brush, as I have been unable to 

 discover any branching-out from the ground), 3-5111. high, with smooth, ashy 

 gray bark and gray or reddish twigs." Leaves after maturity bright green, 

 glabrous on both sides, firm, ovate — obovate, the proportions varying in 

 centimeters 7:6, 7:5.5, 6:4.5, 6:4, 5:4, 5:3, 4:5.4, 4:5.3, and 4:3, the outline 

 generally becoming narrowed or more or less acute or cuneiform toward the 

 base, with an acute apex at least in young leaves (a rounded or notched apex 

 often caused by some injury to the top), and an irregular dentation of the 

 margin from the middle to the apex. Besides, mature leaves present quite 

 variable outlines. Flowering racemes 2-3 cm. long, pedicals 0:5 — icm. long; 

 sepals triangular-lanceolate or broader; petals spathulate, 5-6mm. long. 

 Fruiting raceme 5cm. long. Pome small, 5mm. in diameter (but only one 

 seen). Winter buds pubescent. 



Apt to be found on hillsides covered with a dense wooded vegetation. 

 The type was collected by the writer on May 15 and Sept. 3, 1918 in the 

 Turtle Mountains of Rolette Co. 



Insert after no. 599, Oxyacantha chrysocarpa: 



1282. Oxyacantha mollis (T. &. G.) Lunell. Crataegus mollis 



