ROSA IN NORTH DAKOTA 139 



7. Rosa deseria. Vide Midi. Nat. II., 156, (1912). 

 8. Rosa poetica sp. nov. 



Arbustum fere metrale, spinis gracilibus, sed firmis, rectis, 

 neque basim versus valde ampliatis, sub stipuliis permancntiori- 

 bus, et ramis nitidis, obscure fuscis vestitum. Stipulae superne 

 glabrae, subtus pubescentes, setis apice glandulosis marginatae. 

 Racliis et nervus medianus inferior folii, petioli et petioluli glandulis 

 magis minusve stipitatis hispidi. Praeterea rachis apicibus glandu- 

 losis setosa est, et spinosa. Foliola 7-9, petiolulata, ovalia, basi 

 magis minusve cuneata, apice obtuso vel acuto, bis serrata subtus 

 resinosa. Sepala integra vel lobata. Flores corymbosi vel solitarii. 

 Receptaculum rubrum, globulare vel pyriforme, apice elongate, i 

 cm. diametro. 



Shrub nearly meter-high, with slender, but firm, straight 

 prickles, not considerably thickened at base, quite persistent 

 beneath the stipules, and with shining, dark-brown branches. 

 Stipules glabrous above, pubescent beneath, margined with 

 glandular-tipped setae. Leaf-rachis, lower median leaflet-nerve, 

 petioles and petiolules hispid with more or less stipitate glands. 

 Rachis, in addition, bristly with glandular tips, prickly. Leaflets 

 7-9, petiolulate, oval, with more or less cuneate base and obtuse 

 or acute apex, doubly serrate, glabrate above, pubescent and 

 resinous beneath. Flowers corymbose or solitary. Sepals entire 

 or lobed. Receptaculum red, globular or pyriform, with pointed 

 apex, I cm. in diameter. 



This plainly distinct ally of R. Fendleri was collected by the 

 writer on August 23, 19 13, on the banks of the Missouri, not far 

 from Bismarck, Burleigh County. 



9. Rosa terrens. Vide Midi. Nat. II., 155, (1912). 



Considered distinct on account of its enormous spines, etc., 



but perhaps correctly suggested by Dr. P. A. Rydberg as identical 



with R. Maximiliani Ness., though this species has a large yellow 



fruit, as stated in Rydberg's Flora of Montana, 255 (1900.) 



10. Rosa suhnuda. Vide Midi. Nat. II. 153. (1912). 



II. Rosa naiadum sp. nov. 



Caudex et rami lignei obscure fusci, nitidi, aeque atque rami 

 herbacei spinis fragilibus, rectis, e basi compressis, erectis vel 

 pronis, infrastipularibus ceteris permanentioribus vestiti, vel 

 paene vel omnino nudi. Stipulae amplae, marginibus denticulatis 



