Article (website)  (2007)  
 
Rosa spithamea S.Watson
Possible Synonyms (working list):
R. adenocarpa Greene Leafl. Bot. Observ. Crit. 2: 261. 1912:... [hips of spithamea, but prickles and leaflet shape of bridgesii]

(1912)  Page(s) 261, Vol. II.  
 
In the article, "Certain Western Roses"
Rosa adenocarpa Dwarf and almost herbaceous, simple and upright above the almost entirely subterranean woody part, only 4 to 7 inches high, with about 4 leaves and 1 to 3 terminal small flowers; stem slender, wholly glabrous and unarmed, or in a few with here and there a short stout straight prickle: leaflets 5, rarely 7, very unequal, very broadly obovate to nearly orbicular, petiolulate, coarsely, incisely and somewhat doubly serrate, apparently glabrous...rachis...destitute of prickles but quite densely glandular-villous; stipules not very broad, their lobes...strongly glandular-serrulate; fruit quite strongly armed with gland-tipped prickles.
Singular species, despite all its peculiar characteristics, a genuine member of this gymnocarpous group, known only as collected on Mount Grayback in southwestern Oregon, 15 June, by C.V. Piper.