156 AMERICAN MIDLAND NATURALIST 
prickles of different size which especially on the sterile branches 
become very large and of a formidable appearance. Stipules with 
broad, glandular-serrulate wings, glabrous or glabrate. Leaf- 
rachis tomentulose with occasional prickles. Leaflets dark green, 
obovate or oval, obtuse, with a cuneate base, serrate to. somewhat 
below the middle, 2-3 cm. long, petiolulate, softly pubescent 
beneath, glabrate above, 7-11 (the last pair smaller, attached 
where the upper margins of the wings of the stipule join the 
rachis, their petiolules sometimes running parallel to the rachis, 
one of these leaflets often wanting). Flowers not seen, corymbose. 
Sepals lanceolate, entire or lobed, white-woolly within and on 
the margins, glandular-hispid on the back. Fruit globular, 1-cm. 
in diameter. 
Collected by the writer on a bare gravelly desert-like plain 
at Pleasant Lake, Benson County, on August 14, I9II. 
Rosa deserta sp. nov. 
Circiter 5 dm. alta, spinis mediocriter fortibus, sparsis, ferme 
rectis neque longitudine admodum variabilibus armata, caudices 
obscure cani, rami obscure fusci. Stipulae comparate amplis- 
simae, integrae vel glanduloso-serrulatae, glabrae. Rachis folii 
glabra, spinulis forsan armata, propemodum capillaris. Foliola 
7 (foliolis 1 vel 2 minoribus saepe additis et inter alas stipulae 
affixis), conspicue petiolulata, late vel anguste obovata, basi 
cuneata vel rotundata et apice obtusa, basi excepta serrata, 
5-12 mm. longa, ambobus lateribus glabra. Pedunculi 0.5~1 
cm. longi. Flores mihi ignoti, perparvi autem, ut conjici potest, 
corymbosi vel solitarii. Receptaculum glabrum. Sepala lan- 
ceolata, integra vel lobata, interne et marginaliter albido-lanata, 
tergo glanduloso-hispido et parallelo-venoso. ~ Fructus ruber, 
globularis vel pyriformis, 6-10 mm. diametro. 
About 5 dm. high, armed\with moderately strong, scattered, 
nearly straight prickles, not very variable in size, the main stems 
a dull gray, the branches a dull brown. Stipules proportionately 
very ample, entire or glandular-serrulate, glabrous. Leaf-rachis 
glabrous with occasional prickles, almost capillary. Leaflets 7 
(often with a single or a pair of smaller additional leaflets attached 
between the wings of the stipules), markedly petiolulate, broadly 
to narrowly obovate, with cuneate or rounded base and obtuse 
apex, serrate except at the base, 5-12 mm. long, glabrous on both 
